AIA/NAS 679-2010 pdf download NUT, SELF-LOCKING, HEXAGON, LOW HEIGHT
MATERIAL:
STEEL:
SEE PROCUREMENT SPECIFICATION.
CRES: A286 PER AMS5525, NON-MAGNETIC.
FINISH:
STEEL: CADMIUM PLATE PER AMS-QQ-P-41 6 PLUS AN APPROVED DRY FILM LUBRICANT. TYPE AND CLASS OF PLATING IS OPTIONAL IF LUBRICATED NUTS WILL MEET THE SALT SPRAY REQUIREMENTS OF AMS-QQ-P-41 6, TYPE II.
CRES: SILVER PLATE FOR 800° F USE PER AMS2410 TO A .0002 MINIMUM THICKNESS ON SURFACES WHICH CAN BE TOUCHED BY A .7500 (3/4-INCH) BALL. THREADS SHALL SHOW COMPLETE COVERAGE, BUT THICKNESS REQUIREMENT ON THREADS IS WAIVED.
CRES: APPROVED DRY FILM LUBRICANT FOR 450° F USE.
CODE:
DASH NO. SUFFIXED BY “W” = INTERNAL WRENCHING (SIZES 04, 06, 08, 3 AND 4 ONLY). INSERT “X” IN LIEU OF “A” IN THE 450°F STEEL CODE FOR CADMIUM PLATED STEEL NUTS WITHOUT LUBRICANT.
EXAMPLE OF PART NUMBERS:
NAS679A4 = .2500-28 NUT, ALL METAL CONSTRUCTION, INTERNAL WRENCHING NOT REQUIRED.
NAS679A4W = .2500-28 NUT, ALL METAL CONSTRUCTION, WITH INTERNAL WRENCHING FEATURE.
NAS679C4 = .2500-28 NUT, ALL METAL CONSTRUCTION OF A286 CRES, SILVER PLATED FOR 800°F USE,INTERNAL WRENCHING FEATURE NOT REQUIRED.
NAS679C4MW = .2500-28 NUT, ALL METAL CONSTRUCTION OF A286 CRES, WITH AN APPROVED DRY FILM LUBRICANT, INTERNAL WRENCHING FEATURE, FOR 450°F USE.
NAS679X4 = .2500-28 NUT, ALL METAL CONSTRUCTION, INTERNAL WRENCHING NOT REQUIRED, WITHOUT LUBRICANT.
NOTES:
/1 / MINIMUM “A” LIMITED ONLY BY STRENGTH REQUIREMENT OF SPECIFICATION.
/2/ DIMENSIONS “H” AND “ØL” APPLICABLE TO INTERNAL WRENCHING TYPE, CODE W, ONLY.
/3/ THREADS IN ACCORDANCE WITH AS8879 BEFORE LUBRICATION. THREADS IN ACCORDANCE WITH MIL-S-7742 ARE ACCEPTABLE UNTIL 31 DECEMBER 1 969.
/4/ MAGNETIC PERMEABILITY OF CRES NUTS SHALL BE LESS THAN 2.0 (AIR = 1 .0) FOR A FIELD STRENGTH
H = 200 OERSTEDS USING A MAGNETIC PERMEABILITY INDICATOR PER ASTM A 342/A 342M (TEST METHOD 3) OR EQUIVALENT.
/5/ PLUS TOLERANCE ON DIMENSION “H” SHALL BE +.005 AND +.006 ON SIZES 04 AND 06 RESPECTIVELY.
(6) AXIAL STRENGTH REQUIREMENTS PER NASM25027 TABLE I VALUES FOR REGULAR STEEL NUTS.
(7) UNLESS OTHERWISE SPECIFIED, PART INVENTORY MANUFACTURED TO PREVIOUS REVISIONS OF THE APPLICABLE DRAWING OR SPECIFICATION MAY BE PROCURED AND USED UNTIL STOCK IS DEPLETED.
(8) DIMENSIONS APPLY AFTER FINISH UNLESS OTHERWISE SPECIFIED.
(9) DIMENSIONS IN INCHES.
(1 0) THIS STANDARD TAKES PRECEDENCE OVER DOCUMENTS REFERENCED HEREIN.
(1 1 ) REMOVE ALL BURRS AND SHARP EDGES.
(1 2) DIMENSIONING AND TOLERANCING PER ANSI Y1 4.5M-1 982.

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