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 485 of 522

TM 9-2510-247-13&P

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TORQUE VALUES FOR THREADED FASTENERS

1.

SCOPE

This work package lists standard torque values, as shown in Table 5, and provides general

information for applying torque. Special torque values and tightening sequences are indicated in the

maintenance procedures for applicable components.

2.

GENERAL

a.

Always use the torque values listed in Table 5 when the maintenance procedure does not give

a specific torque value.

b.

Unless otherwise indicated, standard torque tolerance shall be + 10%.

c.

Torque values listed are based on clean, dry threads. Reduce torque by 10% when engine oil is

used as a lubricant. Reduce torque by 20% if new plated capscrews are used.

d.

Capscrews threaded into aluminum may require reductions in torque of 30% or more of Grade 5

capscrew torque. Capscrew threaded into aluminum must also attain two capscrew diameters of

thread engagement.

CAUTION

If replacement capscrews are of higher grade than originally supplied, use

torque specifications for the original. This will prevent equipment damage

due to overtorquing.

3.

TORQUE LIMITS

Table 5 lists dry torque limits, which are used on screws that do not have lubricants

applied to threads. Table 6 lists wet torque limits, which are used on screws that have high pressure lubricants

applied to threads.

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