Appendix D. TORQUE VALUE

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Section II. EXPENDABLE/DURABLE SUPPLIES AND MATERIALS LIST - continued

TM-55-1905-223-24-1 Main Propulsion Engine for Landing Craft Utility (LCU) NSN 1905-01-154-1191 Manual

APPENDIX D

TM 55-1905-223-24-1

APPENDIX D

TORQUE VALUES

D-1. Scope. SAE capscrews are graded according to the strength of the capscrew. They are marked on the

head so the correct strength and torque value are known. The tables in this appendix will list the capscrew

markings with correct torque values as well as values for pipe plugs and metric bolts.

CAUTION

If replacement capscrews are of a higher grade than originally

supplied, adhere to torque specifications for that placement.

NOTES

1. Always use the torque values listed when specific torque values are not available.

2. Do not use these listed values in place of those specified in other sections of this manua;l special

attention should be observed when using SAE Grade 6, 7 and 8 capscrews.

3. This listing is based on use of clean, dry threads.

4. Reduce torque by 10% when engine oil is used as a lubricant.

5. Reduce torque by 20% if new plated capscrews are used.

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

capscrews torque and must attain two capscrew diameters of thread engagement.

D-1