AIA/NAS 1423-2013 pdf download NUT, PLAIN, HEXAGON, DRILLED JAM, THIN
MATERIAL:
ALLOY STEEL: 41 30 (UNS G41 300) PER MIL-S-6758, COND D-1 , D-4 OR F-4 AMS6346, AMS6348, OR AMS6528; OR 4340 (UNS G43406) PER MIL-S-5000, COND C-1 OR C-4 AMS641 5 OR AMS6484.
CRES: A286 (UNS S66286) PER AMS5525, AMS5732, OR AMS5737.
HEAT TREATMENT:
41 30: 34-38 HRC (1 50 KSI MIN Ftu) PER AMS2759.
4340: NORMALIZE, HARDEN, AND TEMPER, 34-38 HRC (1 50 KSI MIN Ftu) PER AMS2759.
CRES: 1 50 KSI MIN Ftu PER AMS2759.
FINISH:
ALLOY STEEL: CADMIUM PLATE PER AMS-QQ-P-41 6, TYPE II, CLASS 2. PARTS ALREADY MADE WITH CLASS 3 PLATING MAY BE FURNISHED FROM SUPPLIERS’ STOCK UNTIL 1 5 SEPT, 1 974.
CRES: PASSIVATE PER AMS2700, METHOD 1 , CLASS 4.
CODE:
DASH NUMBER DESIGNATES THREAD SIZE AS NOTED IN TABLE I.
SUFFIX “LH” TO DASH NUMBER FOR LEFT HAND THREAD.
LETTER “C” IN LIEU OF DASH INDICATES CRES MATERIAL.
EXAMPLES OF PART NUMBER:
NAS1 423-4 = ALLOY STEEL NUT, CADMIUM PLATED, .2500-28 UNJF-3B
NAS1 423-4LH = ALLOY STEEL NUT, CADMIUM PLATED, .2500-28 UNJF-3B-LH (LEFT HAND THREAD)
NAS1 423C4 = CRES NUT, PASSIVATED, .2500-28 UNJF-3B