HOW TO USE TORQUE TABLE -726250994

TM 9-2320-364-34-1

D-3. HOW TO USE TORQUE TABLE (CONT).

(2)

Measure out one inch with a ruler and count

the number of threads per inch.

(3)

Under the heading SIZE, look down the left

hand column until you find the diameter of

the screw you are installing (there will

usually be two lines beginning with the

same size).

(4)

In the second column under SIZE, find the

number of threads per inch that matches the

number of threads per inch you counted in

Step 2. (Not required for metric screws).

(5)

To find the grade screw you are installing,

match the markings on the head to the

correct picture of CAPSCREW HEAD

MARKINGS on the torque table.

(6)

Look down the column under the picture

you found in Step 5. until you find the

torque limit (lb-ft or N.m) for the diameter

and threads per inch of the screw you are

installing.

(7)

Use wet torque values.

Table D-1. Torque Limits For Wet Flange Nuts

DIAMETER

THREADS

TORQUE

SPIRALOCK FLANGE

NUT MARKINGS

PER INCH

N.m

GRADE 8

IN.

LB-FT

1/4

6.35

5/16

7.94

3/8

9.65

1/2

12.70

110

149

5/8

15.87

210

285

3/4

19.05

375

508

Table D-2. Torque Limits For Wet Socket Head Cap Screws

TORQUE IN FT. LBS. (CAP SCREWS) LUBED

SIZE

SOC HD OR 12 PT

SOC FLAT HD

SOC HEAD/12 PT.

.10-24

2.5

.25-20

.31-18

.38-16

.50-13

.56-12

106

SOC FLAT HEAD

.62-11

212

106

.75-10

375

187

1.00-8

781

D-2