AIA/NAS 1287-2011 pdf download NUT, EXTENDED WASHER, HEXAGON, SELF-LOCKING, LOW HEIGHT, C’BORE
MATERIAL:
ALLOY STEEL PER AMS6304, 800 °F
M252 HEAT RESISTANT NICKEL BASE ALLOY PER AMS5756, 1 ,400 °F
HEAT TREATMENT:
ALLOY STEEL – 41 -48 HRC
NICKEL BASE ALLOY – 36-42 HRC
6 COMPLETELY REVISED
ALLOY STEEL – NICKEL-ZINC ALLOY PLATE AND HYDROGEN EMBRITTLEMENT RELIEF PER AMS2417NICKEL BASE ALLOY – SILVER PLATE FOR 800 F USE PER AMS2410 TO A .0002 MINIMUM THICKNESSON SURFACES WHICH CAN BE TOUCHED BY A .7500 (3/4-INCH) BALL.THREADS SHALL SHOWCOMPLETE COVERAGE,BUT THICKNESS REQUIREMENT ON THREADS IS WAIVED
EXAMPLES OF PART NUMBER:
NAS1287-3:NUTALLOY STEEL..1900-32 THREAD SIZENICKEL-ZINC ALLOY PLATE800NAS1287C3:NUTM252.1900-32 THREAD SIZESILVER PLATE1400F
NOTES:
PERFORMANCE: 800F PER NASM25027.1,400°F PER NASM7873 TO 1.200F
THREADS: THREADS IN ACCORDANCE WITH AS8879 BEFORE LUBRICATION. THREADS IN ACCORDANCEWITH MIL-S-7742 ARE ACCEPTABLE UNTIL 31 DECEMBER 1969.
MAXIMUM TEMPERATURE LIMITATIONS:NAS1287-3: 800 F; USE WITH NAS1292J THRU NAS1296J OR NAS1322J THRU NAS1326J PINS ONLY.NAS1287C3: 1.400 F: USE WITH NAS1292R THRU NAS1296R OR NAS1322R THRU NAS1326R PINSONLY ON OVERSIZE PINS USE WASHERS TO PREVENT SHANK NUT INTERFERENCE
DIMENSIONS IN INCHES AND APPLY AFTER FINISH UNLESS OTHERWISE SPECIFIED.
THIS STANDARD TAKES PRECEDENCE OVER DOCUMENTS REFERENCED HEREIN.
UNLESS OTHERWISE SPECIFIED, PART INVENTORY MANUFACTURED TO PREVIOUS REVISIONS OF THEAPPLICABLE DRAWING OR SPECIFICATION MAY BE PROCURED AND USED UNTIL STOCK IS DEPLETED
REFERENCED DOCUMENTS SHALL BE THE ISSUE IN EFFECT ON DATE OF INVITATIONS FOR BID
DIMENSIONING AND TOLERANCING PER ANSI Y14.5M-1982.
MINIMUM “H” LIMITED ONLY BY STRENGTH REQUIREMENTS OF SPECIFICATIONS NASM25027 ANDNASM7873
WRENCHING HEIGHT MUST BE ADEQUATE TO MEET NASM25027 WRENCHING TORQUE REQUIREMENTS
PROCUREMENT SPECIFICATION:
NASM25027 EXCEPT AS NOTED.ALL NUTS SHALL MEET QUALIFICATION AND INSPECTIONREQUIREMENTS. MANUFACTURERS SHALL PROVIDE EVIDENCE OF QUALIFICATION WHEN REQUIREDTESTING SHALL BE PERFORMED BY MANUFACTURER OR INDEPENDENT LABORATORY. PROCURINGAGENCY MAY CONDUCT CONFIRMING QUALIFICATION TESTS NO QPL SHALL BE ESTABLISHED

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