TM-9-2510-247-13-P
FIFTH WHEEL TOWING DEVICE MODEL 250M
TECHNICAL MANUAL; OPERATOR’S, UNIT, AND DIRECT SUPPORT MAINTENANCE MANUAL, REPAIR PARTS AND SPECIAL TOOLS LIST
JULY 2004
TM-9-2510-247-13-P - Page 489 of 522
TM 9-2510-247-13&P
0089 00
5.
TIGHTENING METAL FASTENERS - Continued
Table 7.
Torque Ranges
STATED RANGE
MOST EFFECTIVE RANGE
0-600 lb-ft (0-813.60 Nm)
150-450 lb-ft (203.40-610.20 Nm)
0-170 lb-ft (0-230.52 Nm)
44-131 lb-ft (59.67-177.64 Nm)
15-75 lb-ft (61.02-101.70 Nm)
30-60 lb-ft (40.68-81.36 Nm)
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6.
FASTENER SIZE AND THREAD PATTERN
Threaded fasteners are categorized according to diameter of the fastener shank. Thread styles
are divided into broad groups, the two most common being coarse (Unified Coarse-UNC) and fine (Unified
Fine-UNF0. These groups are defined by the number of threads per inch on the bolt shanks. In addition,
threads are categorized by thread class (Table 8), which is a measure of the degree between threads of bolt or
screw (external threads) and threads of the attaching nut or tapped hole (internal threads of the attaching nut or
tapped hole) (internal threads). The most common thread class for bolts and screws is Class 2.
LENGTH
(BOLT SHANK)
THICKNESS
OR HEIGHT
OF HEAD
BODY LENGTH
NOMINAL DIAMETER
THREAD
RUNOUT
LENGTH
THREAD
LENGTH
GRIP
LENGTH
HEIGHT
OF NUT
LENGTH
(BOLT SHANK)
THICKNESS
OR HEIGHT
OF HEAD
BODY LENGTH
NOMINAL DIAMETER
THREAD
RUNOUT
LENGTH
THREAD
LENGTH
GRIP
LENGTH
HEIGHT
OF NUT
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