TM-5-3990-263-13-P

PALLET, ADAPTER, BRIDGE, M15

TECHNICAL MANUAL; OPERATOR AND FIELD MAINTENANCE MANUAL INCLUDING REPAIR PARTS AND SPECIAL TOOLS LIST (RPSTL)

APRIL 2012

TM-5-3990-263-13-P - Page 590 of 728

HOW TO USE THE TORQUE TABLE - Continued

NOTE

Step (d) is not required for metric screws.

d.

Under the heading THREADS PER INCH, find the number of threads per inch that matches the number

you counted in Step (b).

e.

To find the grade of the screw you are installing, match the markings on the head of the screw to the

correct picture (Figure 3) under CAPSCREW HEAD MARKINGS on the torque table.

Figure 3.

Capscrew Head Markings.

f.

Look down the column under the picture you found in Step (e) until you find the torque limit (lb-ft or Nm)

for the diameter and threads per inch of the screw you are installing.

1.

Table 1 lists the torque limits for wet flange nuts.

Table

1.

Torque Limits for Wet Flange Nuts

SPIRALOCK

FLANGE NUT

MARKINGS

DIAMETER

THREADS

TORQUE

GRADE 8

IN.

mm

PER INCH

LB-FT

N·m

1/4

5/16

3/8

1/2

5/8

3/4

6.35

7.94

9.65

12.70

15.75

19.05

20

18

16

13

11

10

15

25

45

110

210

375

20

34

61

149

285

508

2.

Table 2 lists the torque limits for wet socket head capscrews.

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