AIA/NAS 1081-2010 pdf download SETSCREW, SELF-LOCKING
* NOT PRACTICAL FOR TPE B CONE POINT SEE VIEW A CONE POINT CONFIGURATION LIMITS THE NUMBER OF THREADS
FOR LENGTHS ABOVE HEAVY LINE – SEE /5/.
MATERIAL:
STEEL, HIGH GRADE ALLOY 40L37, 4037 (UNS G40370), 4137 (UNS G41370), 4140 (UNS G41400), 41L408630 UNS G86300), OR 8740 (UNS G87400) HARDENED BY QUENCHING IN OIL FROM THE HARDENINGTEMPERATURE AND TEMPERED TO 45-53 HRC.
CORROSION RESISTANT STEEL PER AMS5640，TYPE 1 OR 2
FINISH:
STEEL – CADMIUM PLATE PER AMS-QQ-P-416,TYPE IICLASS 2.
CRES – PASSIVATE PER AMS2700.METHOD 1.CLASS 1.
NOTES:
/1 / SOCKET DEPTH: THE DEPTH OF SOCKET SHALL BE AS GREAT AS PRACTICABLE BUT VARYING CONDITIONS RENDER IT INADVISABLE TO SPECIFY DEFINITE VALUES FOR THIS DIMENSION.
/2/ SOCKET END OF SCREW SHALL BE FLAT AND CHAMFERED. THE CHAMFER SHALL EXTEND TO THE MINOR DIAMETER OF THE THREAD AND THE EDGE BETWEEN FLAT AND CHAMFER SHALL BE SLIGHTLY ROUNDED.
/3/ “M” DIMENSION SHALL CONFORM TO THE REQUIREMENTS OF NASM1 5981 EXCEPT AS NOTED. “N” AND “P” DIMENSIONS ARE THE MAXIMUM POINT PLUS ONE THREAD PITCH.
(4) SEE NASM565 FOR SET SCREWS WITHOUT SELF-LOCKING FEATURE.
/5/ MIL-DTL-1 8240 DOES NOT ESTABLISH REQUIREMENTS FOR SIZE .0860-56 SCREWS AND LENGTH OF THREADS LESS THAN “M”. ONLY POSITIVE INDICATION OF TORQUE IS REQUIRED FOR ITEMS ABOVE THE HEAVY LINE.
/6/ OMIT ELEMENT TYPE CODE WHENEVER POSSIBLE TO ALLOW AN OPTION.
(7) DIMENSIONS IN INCHES AND APPLY AFTER FINISH UNLESS OTHERWISE SPECIFIED. TOLERANCES UNLESS OTHERWISE SPECIFIED: DECIMALS ± .01 0
(8) PARTS THREADED PER MIL-S-7742 MAY BE FURNISHED FROM SUPPLIER’S STOCK UNTIL DECEMBER 1 5,1 974.
/9/ LEFT HAND THREADED PARTS SHALL BE MARKED WITH YELLOW PAINT OR DYE, ON THE RECESS END OF PART. OVERSPRAY ON THREADS IS ACCEPTABLE.
(1 0) REMOVE ALL BURRS AND SHARP EDGES.
(1 1 ) THIS STANDARD TAKES PRECEDENCE OVER DOCUMENTS REFERENCED HEREIN.

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