3020-00-222-2664

LINK,ROLLER CHAIN

3020-00-222-2664 (3020002222664, 002222664)
Part Numbers (19 listings): MILSTD421-60-14C2CLA | 9995579 | ASA60CL | TYPE60CL | B5235H | 6261K195 | C320433 | 60CL | BKCL60 | 32138 | C60M | 171014 | 32040 | 3116-635-2M | 3116-635-2P | 60-CON | DC12-1 | 141-2A | 9000K |
Summary

FSG 30 / FSC 3020

DEMIL: A

DEMIL INT:

HMIC: N

Date Created: 1 Jan 1961

Unit Weight: 0.1 lbs

Unit Size: None

Unit Pack Cube: 0.007 cu ft

MSDS: None

Hazmat: None

Request a Quote


;


MASTER CROSS REFERENCE LIST (MCRL) | NSN 3020-00-222-2664 Submit RFQ
Manufacturer Part NumberRNCCRNVCManufacturer NameCAGE
MILSTD421-60-14C2CLA2 - Definitive Specification or Standard Document2 - Production ItemMILITARY STANDARDS  96906    CAGE 96906  
99955795 - Replaced / Discontinued1 - Incomplete Part NumberU S ARMY AVIATION AND MISSILE  18876    CAGE 18876  
ASA60CL5 - Replaced / Discontinued1 - Incomplete Part NumberAMERICAN NATIONAL STANDARDS  80204    CAGE 80204  
TYPE60CL5 - Replaced / Discontinued1 - Incomplete Part NumberAMERICAN NATIONAL STANDARDS  80204    CAGE 80204  
B5235H5 - Replaced / Discontinued1 - Incomplete Part NumberDEERE & CO  75160    CAGE 75160  
6261K1955 - Replaced / Discontinued1 - Incomplete Part NumberMCMASTER-CARR SUPPLY COMPANY  39428    CAGE 39428  
C3204335 - Replaced / Discontinued1 - Incomplete Part NumberDIAMOND CHAIN CO  72625      
60CL5 - Replaced / Discontinued1 - Incomplete Part NumberJEFFREY CO THE  80217      
BKCL605 - Replaced / Discontinued9 - No Longer UsedBLAW KNOX CORP  70945      
321385 - Replaced / Discontinued9 - No Longer UsedMOBILE TECHNOLOGIES INC  0F2K0      
C60M5 - Replaced / Discontinued9 - No Longer UsedBAUGHMAN MFG CO  90293      
1710145 - Replaced / Discontinued9 - No Longer UsedVICTOR FLUID POWER INC  51387      
320405 - Replaced / Discontinued9 - No Longer UsedVICTOR FLUID POWER INC  51387      
3116-635-2M5 - Replaced / Discontinued9 - No Longer UsedAMERICAN LAUNDRY MACHINERY INC  02432    CAGE 02432  
3116-635-2P5 - Replaced / Discontinued9 - No Longer UsedAMERICAN LAUNDRY MACHINERY INC  02432    CAGE 02432  
60-CON5 - Replaced / Discontinued9 - No Longer UsedEMERSON POWER TRANSMISSION  76474      
DC12-15 - Replaced / Discontinued9 - No Longer UsedWHITNEY CHAIN OPERATION POWER  81130      
141-2A5 - Replaced / Discontinued9 - No Longer UsedAMF INC WORLD HEADQUARTERS  02470      
9000K5 - Replaced / Discontinued9 - No Longer UsedWHITE FARM EQUIPMENT CO  81240      
171014C - Advisory Reference1 - Incomplete Part NumberHAMPTON HYDRAULICS LLC  62410      
171014C - Advisory Reference1 - Incomplete Part NumberHAMPTON HYDRAULICS LLC  62410      
Code Definitions

2 - Definitive Specification or Standard Document

Reference Number Category Code (DRN_2910)


Definitive Government Specification or Standard Designator Reference. A part number, style number, or type designator included in or developed in accordance with a Government specification or standard which has the effect of fully identifying an item of supply. This code shall also be used for a Government specification or standard which, although not including part numbers, style numbers, or type designators, covers a single item of upply. These reference numbers may be coded with Reference Number Variation Code (RNVC) 1 in accordance with volume 2, paragraph 2.9.2.n.(4).

5 - Replaced / Discontinued

Reference Number Category Code (DRN_2910)


Secondary Reference. Any additional number, other than a primary number (codes 1,2,3,4) informative reference (code 6) or vendor item drawing reference (code 7) assigned to an item of production or supply by a commercial or Government organization, which represents the same item of production or supply to which the National Stock Number (NSN) was assigned. The reference number may have had an RNCC of 1, 2, 3, 4 or 7 but has since been replaced in the item-of-supply concept of the NSN by another primary number.

C - Advisory Reference

Reference Number Category Code (DRN_2910)


Advisory Reference. A number assigned to an item of production or supply not included in the item-of-supply concept to which the NSN has been assigned (e.g., an item that may have been used in the preproduction equipment design which has since been redesigned or replaced). Use of this RNCC is restricted to conditions where cross-reference is required to establish identification to an item of supply. Additionally, there is not direct relationship of the reference number to the NSN other than a Service/Agency individual decision. (RNCC shall be used only in conjunction with RNVC 1.

2 - Production Item

Reference Number Variation Code (DRN_4780)


A design control or other reference number that is an item-identifying number for an item of production, or a source control reference or a specification or standard part, type, or similar reference number that is an item-identifying number for an item of supply.

1 - Incomplete Part Number

Reference Number Variation Code (DRN_4780)


A design control or other reference number that does NOT identify an item of production without the use of additional information, or a specific part, type, or similar reference number does NOT identify or item of supply without the use of additional information.

9 - No Longer Used

Reference Number Variation Code (DRN_4780)


A specification, standard, or other reference number which is superseded, canceled, obsolete or discontinued and is coded Reference Number Category Code (RNCC) 5; a reference number for information only coded RNCC 6; or a reference number coded RNCC D.


FLIS - SEG A - IDENTIFICATION | NSN 3020-00-222-2664 Submit RFQ
FSGFSCNIINFIIGINCCRITICALITYTYPE OF ITEMMRCDEMILHMICEDCPMICADPECDATE CREATED
303020002222664A2350004488X1ANU1 Jan 1961
Code Definitions

30

Federal Supply Group (FSG_3994/FSC_WI_FSG_3996)


Mechanical Power Transmission Equipment

3020

Federal Supply Class (FSC_3994/FSC_WI_FSC_3996)


Gears, Pulleys, Sprockets, and Transmission Chain

002222664

National Item Identification Number (NCB_CD_4130/I_I_NBR_4131)


NSN 3020-00-222-2664

A23500

Federal Item Identification Guide (FIIG_4065)

04488

Item Naming Code (INC_4080)

1 Jan 1961

NIIN Assignment Date (DT_NIIN_ASGMT_2180)

X

Item Criticality (CRITL_CD_FIIG_3843)


The item does not have a nuclear hardened feature or any other critical feature such as tolerance, fit restriction or application.

1

Type of Item Identification (TYP_II_4820)


Full Descriptive Item Identification

A

Demilitarization Code (DEMIL_CD_0167)


Non-MLI/ Non-SLI — Demilitarization not required.

N

Hazardous Material Indicator Code (HMIC_0865)


Indicates there is no data in the HMIRS and the NSN is in a FSC not generally suspected of containing hazardous materials.

U

Precious Metals Indicator Code (PMIC_0802)


Precious Metal Content is unknown.


Similar & Related NSN Parts

FLIS - SEG B - MOE RULE DATA | NSN 3020-00-222-2664 Submit RFQ
MOE RuleFormer MOEAMCAMSCNIMSCIMCIMC ActivityAACDSORCollaboratorsReceiversEffective Date
G12000L1 Apr 1991
G77000L1 Apr 1991
G90000L1 Apr 1991
YB011 Apr 1991
ZC011 Apr 1991
ZH011 Apr 1991
ZK011 Apr 1991
ZT011 Apr 1991
ZU011 Apr 1991
ZR011 Jul 1997
ZW011 Nov 1998
A920A1811GZCDAJAZ1 Aug 2006
FXGCFXAX1GZSX1 Aug 2006
MC40MC011GZPA1 Aug 2006
N9BCNICD1GZGHGTKEHD1 Aug 2006
ZX011 Aug 2012
Code Definitions

0

Acquisition Method Code (AMC_2871)


Not Established

L

Acquisition Advice Code (AAC_2507)


LOCAL PURCHASE (NON-STOCKED ITEMS) Defense Logistics Agency (DLA)/GSA/Service/Agency-managed items authorized for local purchase as normal means of support at base, post, camp or station level. Item not stocked in wholesale distribution system of IMM/Service/Agency ICP.

1

Acquisition Method Code (AMC_2871)


Suitable for competitive acquisition. Potential sources shall include dealers/distributors. If sources are limited to the prime contractor and a subcontractor, a competitive code shall not be assigned unless both sources are expected to compete independently for contracts for the part.

G

Acquisition Method Suffix Code (AMSC_2876)


The Government has unlimited rights to the technical data, and the data package is complete. Valid AMCs: 1 and 2.

Z

Item Management Code (IMC_2744)


Integrated Management: Relinquishment of Service management of an item in designated commodity oriented Federal Supply Classes to the IMM (FSC manager) for management.

CD

Item Management Coding Activity (IMC_ACTY_2748)


U.S. Army War Reserve Command, New Cumberland, PA 17070-5008

SX

Item Management Coding Activity (IMC_ACTY_2748)


Oklahoma City Air Logistics Center, Tinker AFB, OK 73145-3043

PA

Item Management Coding Activity (IMC_ACTY_2748)


Marine Corps Logistics Base, Albany, GA 31704-1128

GH

Item Management Coding Activity (IMC_ACTY_2748)


Naval Inventory Control Point, Mechanicsburg, PA 17055-0788

KE Collaborators

Supplementary Collaborators (SUPPLM_COLLBR_2533)


Naval ICP, Philadelphia, PA 19111

HD Collaborators

Supplementary Collaborators (SUPPLM_COLLBR_2533)


Naval Inventory Control Point, Mechanicsburg, PA 17055-0788

AJ

Supplementary Receivers (SUPPLM_RCVR_2534)


U.S. Army Soldier's Biological and Chemical, Command, Natick, MA 01760

AZ

Supplementary Receivers (SUPPLM_RCVR_2534)


U.S. Army Tank-Automotive and Armaments, Command, Warren, MI 48397-5000


FLIS - SEG C - REFERENCE NUMBER | NSN 3020-00-222-2664 Submit RFQ
RNFCRNCCRNVCDACRNAACRNSCRNJCSADCMSDSHCCReference NumberCAGE
3226AXDMILSTD421-60-14C2CLA  96906   CAGE/96906
3516AXDC320433  72625  
51AAXB5235H  75160   CAGE/75160
3516AXDASA60CL  80204   CAGE/80204
3516AXDTYPE60CL  80204   CAGE/80204
3516AXD60CL  80217  
351ABDD9995579  18876   CAGE/18876
51EZZ6261K195  39428   CAGE/39428
596AXB171014  51387  
3596AXB32040  51387  
3596AXB3116-635-2M  02432   CAGE/02432
3596AXB3116-635-2P  02432   CAGE/02432
3596AXB141-2A  02470  
596ZZB32138  0F2K0  
3596AXBDC12-1  81130  
3596AXB9000K  81240  
3596AXBC60M  90293  
59EAXB60-CON  76474  
3596AXBBKCL60  70945  
C15ZZ9F171014  62410  
Code Definitions

3

Reference Number Format Code (RNFC_2920)


Number format is unknown. (Coded RNFC 3 by the Defense Logistics Information Service upon implementation of FLIS.)

2

Reference Number Category Code (RNCC_2910)


Definitive Government Specification or Standard Designator Reference. A part number, style number, or type designator included in or developed in accordance with a Government specification or standard which has the effect of fully identifying an item of supply. This code shall also be used for a Government specification or standard which, although not including part numbers, style numbers, or type designators, covers a single item of upply. These reference numbers may be coded with Reference Number Variation Code (RNVC) 1 in accordance with volume 2, paragraph 2.9.2.n.(4).

2

Reference Number Variation Code (RNVC_4780)


A design control or other reference number that is an item-identifying number for an item of production, or a source control reference or a specification or standard part, type, or similar reference number that is an item-identifying number for an item of supply.

6

Document Availability Code (DAC_2640)


The reference number is represented by technical documentation other than a drawing but the documentation was not available to the RNAAC, who may or may not be the submitting activity, at the time of submission of the reference number.

AX

Reference Number Action Activity Code (RNAAC_2900)


Defense Supply Center Columbus, Columbus, OH 43216-5000

D

Reference Number Status Code (RNSC_2923)


Procurement authority of the manufacturer and reference number have not yet been checked. NOTE: This code is to be allocated to reference numbers still requiring checks on procurement authority.

5

Reference Number Category Code (RNCC_2910)


Secondary Reference. Any additional number, other than a primary number (codes 1,2,3,4) informative reference (code 6) or vendor item drawing reference (code 7) assigned to an item of production or supply by a commercial or Government organization, which represents the same item of production or supply to which the National Stock Number (NSN) was assigned. The reference number may have had an RNCC of 1, 2, 3, 4 or 7 but has since been replaced in the item-of-supply concept of the NSN by another primary number.

1

Reference Number Variation Code (RNVC_4780)


A design control or other reference number that does NOT identify an item of production without the use of additional information, or a specific part, type, or similar reference number does NOT identify or item of supply without the use of additional information.

A

Document Availability Code (DAC_2640)


The reference number is represented by an engineering drawing and the drawing is available for unlimited use. The drawing will be furnished by the activity identified by the RNAAC upon request.

BD

Reference Number Action Activity Code (RNAAC_2900)


U.S. Army Aviation and Missile Command, Redstone Arsenal, AL 35898-5230

E

Document Availability Code (DAC_2640)


The reference number is represented by engineering data other than an engineering drawing. The data is available for unlimited use and will be furnished by the activity identified by the RNAAC upon request.

ZZ

Reference Number Action Activity Code (RNAAC_2900)


USA

9

Reference Number Variation Code (RNVC_4780)


A specification, standard, or other reference number which is superseded, canceled, obsolete or discontinued and is coded Reference Number Category Code (RNCC) 5; a reference number for information only coded RNCC 6; or a reference number coded RNCC D.

B

Reference Number Status Code (RNSC_2923)


Manufacturer and/or reference number are not authorized for procurement. NOTE: This code may be used for obsolete or informative reference numbers only.

C

Reference Number Category Code (RNCC_2910)


Advisory Reference. A number assigned to an item of production or supply not included in the item-of-supply concept to which the NSN has been assigned (e.g., an item that may have been used in the preproduction equipment design which has since been redesigned or replaced). Use of this RNCC is restricted to conditions where cross-reference is required to establish identification to an item of supply. Additionally, there is not direct relationship of the reference number to the NSN other than a Service/Agency individual decision. (RNCC shall be used only in conjunction with RNVC 1.

5

Document Availability Code (DAC_2640)


The reference number is represented by a drawing, but the drawing was not available to the RNAAC, who may or may not be the submitting activity, at the time of submission of the reference number.

9F

Service / Agency Designator Code (SADC_4672)


CAGE Status Change


FLIS - SEG E - ITEM STANDARDIZATION DATA | NSN 3020-00-222-2664 Submit RFQ
ISCOriginatorNIIN StatusReplaced / Replacement ISCReplaced / Replacement OriginatorReplacement NIIN StatusReplacement DateReplaced / Replacement NSNDecision Date
2AX014 Jan 1971
Code Definitions

2

Item Standardization Code (ISC_2650)


An item authorized for procurement which has been included in an item reduction study and which initially does not replace an item not authorized for procurement. In addition, in generic relationships, a code 2 item is related to a code 1 item.

AX

Originator of Standardization Decision (ORG_STDZN_DEC_9325)


Defense Supply Center Columbus, Columbus, OH 43216-5000

0

NIIN Status Code (NIIN_STAT_CD_2670)


Item is active. File data coded KFD is forwarded. if this KFD data represents your item of supply, submit, if applicable, an LAD, LAU, or LCU transaction. Otherwise, use the National Stock Number (NSN) in your supply system.

14 Jan 1971

Standardization Decision Date (DT_STDZN_DEC_2300)


FLIS - SEG G - FREIGHT DATA | NSN 3020-00-222-2664 Submit RFQ
IntegrityOriginatingHMCLCLWCCTCCSHCADCACCASHLTLNMFCNMFC Sub ItemUFCFreight DescriptionRail Variance
576Z9AVZM132330X64340TRANSMISSIONS-CLUTCHES-PARTS-NOI
Code Definitions

XX

Originating Activity Code (ORIG_ACTY_CD_4210)


576

Water Commodity Code (WRT_CMDTY_CD_9275)


Metal and Metal Products, (less than 35 feet)

Z

Type Cargo Code (TYPE_CGO_CD_9260)


No special type of cargo code applicable

9

Special Handling Code (SP_HDLG_CD_9240)


No special handling required

A

Air Dimension Code (AIR_DIM_CD_9220)


Shipment is not a consolidation and does not exceed 72 inches in any dimension.

V

Air Commodity Code (AIR_CMTY_HDLG_9215)


Vehicles, machinery, shop and warehouse equipment and supplies, including special tools and equipment, ground servicing and special purpose vehicles, marine equipment and supplies, repair and maintenance parts for the above.

Z

Air Special Handling Code (AIR_CMTY_HDLG_9215)


No special handling required.

M

Less Than Truckload (CLAS_RTNG_CD_2770)


85

132330

National Motor Freight Classification Number (NMFC Item Number) (NMFC_2850)

X

NMFC Sub Item Number (SUB_ITM_NBR_0861)

64340

Uniform Freight Classification (UFC_CD_MODF_3040)

TRANSMISSIONS-CLUTCHES-PARTS-NOI

Freight Description (FRT_DESC_4020)

Rail Variance

Rail Variance (RAIL_VARI_CD_4760)


No Variation. NMFC and UFCC Match.


FLIS - SEG H - MANAGEMENT DATA | NSN 3020-00-222-2664 Submit RFQ
Unit PriceMOESOSAACCIICQUPReparabilityUISLC
DASMSZUAZEA0
DFSMSZUANEA0
DMSMSZUAZEA0
DNSMSZUAEA0
DSSMSZUANEA0
Code Definitions

SMS

Source of Supply (SOS_CD_3690) or Source of Supply Modifier (SOSM_CD_2948)


Defense Logistics Agency, Enterprise Business Systems

Z

Acquisition Advice Code (AAC_2507)


INSURANCE/NUMERIC STOCKAGE OBJECTIVE ITEM. Items which may be required occasionally or intermittently, and prudence requires that a nominal quantity of materiel be stocked due to the essentiality or the lead time of the item. 1. The item is centrally managed, stocked, and issued. 2. Requisitions will be submitted in accordance with IMM/Service requisitioning procedures.

U

Controlled Item Inventory Code (CIIC_2863)


Unclassified

A

Quantity Unit Pack (QUP_6106)


10

Z

Reparability Code (REP_CD_DLA_2934 / REP_CD_CG_0709 / ERRC_CD_AF_2655 / RECOV_CD_MC_2891 / RECOV_CD_AR_2892 / MAT_CTL_NVY_2832)


ARMY: This is a nonreparable item. If condemned or economically unserviceable, then dispose at the level authorized replace the item; MARINE CORPS: Nonreparable item. When unserviceable, condemn and dispose at the level indicated by the first digit of the maintenance code; NAVY: Special Program Consumables

EA

Unit of Issue (UI_3050)


Each - A numeric quantity of one item of supply. Do not use if a more specific term applies, such as kit, set, assortment, assembly, group, sheet, plate, strip or length.

0

Shelf Life Code (SLC_2943)


TYPE I or TYPE II (Non-Deteriorative/No Shelf-Life) - An individual item of supply which is determined through an evaluation of technical test data and/or actual experience to be an item with a definite non-extendible period of shelf-life OR An individual item of supply having an assigned shelf-life time period that may be extended after completion of inspection/test/restorative action.

N

Reparability Code (REP_CD_DLA_2934 / REP_CD_CG_0709 / ERRC_CD_AF_2655 / RECOV_CD_MC_2891 / RECOV_CD_AR_2892 / MAT_CTL_NVY_2832)


AIR FORCE ERRC XB3: Stock Fund (Except Munitions); DLA: This item has been reviewed and a determination made that the item cannot or should not be restored to a serviceable condition from an unserviceable condition; NAVY: 1I cog not stocked print on demand flat forms

DA

Service / Agency Code (MOE_CD_2833)


Department of the Army

DF

Service / Agency Code (MOE_CD_2833)


Department of the Air Force

DM

Service / Agency Code (MOE_CD_2833)


U.S. Marine Corps

DN

Service / Agency Code (MOE_CD_2833)


Department of the Navy

DS

Service / Agency Code (MOE_CD_2833)


Defense Logistics Agency


FLIS - SEG W - PACKAGING DATA | NSN 3020-00-222-2664 Submit RFQ
SourcePICA / SICAPackaging CategoryStoragePreservationClean/DryINT QtyUnit WeightUnit SizeUnit Pack CubeItem WeightItem Dims
PP201AAA0.1 lbs0.007 cu ft
Preservation MaterialWrapping MaterialCushioning / DunnageCushioning ThicknessUnit ContainerIntermediate ContainerUnit Container LevelSpecial MarkingLevel A PackingLevel B PackingMinimal PackingOptional Procedure
4900000BVD300QQO
Code Definitions

P

Packaging Data Source Code (PK_DTA_SRC_CD_5148)


Primary Inventory Control Activity (PICA)

P

Primary / Secondary Inventory Control Code (PICA_SICA_IND_5099)


Primary Inventory Control Activity (PICA)

20

Method of Preservation Code (MTHD_PRSRV_CD_5160)


Preservative coating only (with greaseproof wrap, as required)

1

Cleaning and Drying Procedure Code (CLNG_DRY_PRC_5161)


Any suitable process that is not injurious to the item.

AAA

Intermediate Container Quantity (INTMD_CTN_QTY_5152)

0.1 lbs

Unit Pack Weight (UP_WT_5153)

0.007 cu ft

Unit Pack Cube (UP_CU_5155)

49

Preservation Material Code (PRSRV_MAT_CD_5162)


Vendor's protective grease or oil coating

00

Wrapping Material Code (WRAP_MAT_CD_5163)


No requirement

00

Cushioning and Dunnage Material Code (CUSH_DUN_MAT_5164)


No requirement

0

Thickness of Cushioning or Dunnage Code (THK_CUSH_DUN_5165)


Not Applicable

BV

Unit Container Code (UNIT_CTNR_CD_5166)


MIL-DTL-117, Type III, Class C, Style 1, medium duty, waterproof, greaseproof, opaque bag.

D3

Intermediate Container Code (INTMD_CTNR_CD_5167)


PPP-B-566, PPP-B-676, or ASTM-D5118, folding, setup or fiberboard box.

00

Special Marking Code (SP_MKG_CD_5169)


No special marking

Q

Packing Requirement Code - For Level A (Maximum) Packing (LVL_A_PKG_CD_5170)


Packing shall be accomplished in accordance with table C.II for the packing level specified. Closure sealing and reinforcement shall be in accordance with applicable specification for shipping container.

Q

Packing Requirement Code - For Level B (Intermediate) Packing (LVL_B_PKG_CD_5171)


Packing shall be accomplished in accordance with table C-II for the packing level specified. Closure sealing and reinforcement shall be in accordance with the appropriate shipping container specification.

O

Optional Procedure Indicator Code (OPTNL_PRO_IND_5173)


Options can be exercised as to specific method of preservation or DoD approved packaging materials to be used. However, basic preservation method shall be retained, supplemental data shall be complied with, and unit package dimensions shall not be increased by more than one inch. Equal or better protection shall be given the item and there shall be no increase in the package cost.


FLIS - SEG M/V - CHARACTERISTICS DATA | NSN 3020-00-222-2664 Submit RFQ
MRCDecoded RequirementClear Text Reply
CQBCMinimum Tensile Strength7050 POUNDS PER SQUARE INCH
AKGQNominal Pitch Distance0.750 INCHES
MATTMaterialSTEEL
AWWPLink Nominal Width Between Plates0.7000 INCHES
CTCRLink Pin Nominal Diameter0.2344 INCHES
AWSQLink Plate Nominal Thickness0.0938 INCHES
AWSMLink Plate Width0.615 INCHES NOMINAL
AWFNLink Row Quantity1
AJXTLink StylePIN
AWFWPin Fastening MethodCOTTER PIN AND RIVETED
ACHTPin Overall Length1.1100 INCHES NOMINAL

Questions?


Want to know more about our Defense Services?


Contact Us. We are here to help.


Questions?


Have any questions regarding a Request For Quote?


Contact Us. We are here to help.


Questions?


Ask about our Supply Management Services.


Contact Us. We are here to help.


Back to Top
Back to Top