AIA/NAS 1789-2010 pdf download NUT, SELF-LOCKING, PLATE, SIDE BY SIDE, FLOATING, LOW HEIGHT, REDUCED RIVET SPACING, CBORED, 1 60 KSI, 450° F, 800° F
MATERIAL:
STEEL – CARBON OR ALLOY HEAT TREATED SAE1 030 OR BETTER; NEITHER THE SULFUR NOR PHOSPHORUS CONTENT SHALL EXCEED .050% BY WEIGHT.
CRES – A286 PER AMS5525, AMS 5732, AMS5735, AMS5737 OR AMS5853. /7/
FINISH: STEEL – CADMIUM PLATE PER AMS-QQ-P-41 6, TYPE II, CLASS 2.
CRES – SILVER PLATE FOR 800˚F USE PER AMS2410 TO A .0002 MIN THICKNESS ON SURFACE WHICH CAN BETOUCHED BY A .750 DIAMETER BALL. THREADS SHALL SHOW COMPLETE COVERAGE, BUT THICKNESS REQUIREMENTS ON THREADS IS WAIVED.
PASSIVATE PER AMS2700, METHOD 1 , CLASS 4 ALL CRES PARTS BEFORE THE APPLICATION OF DRY FILM LUBRICANT.
LUBRICANT:
MOLYDISULFIDE (MoS 2 ) DRY FILM LUBRICANT PER NASM25027. THE INCLUSION OF A LUBRICANT ON THE BASKETS OF DRY FILM LUBRICATED NUTS IS OPTIONAL.
CODE:
“-” STEEL, CADMIUM PLATED WITH DRY FILM LUBRICANT.
“C” IN PLACE OF DASH INDICATES CRES NUTS WITH SILVER PLATE.
“K” SUFFIXED TO THE DASH NUMBER INDICATES DIMPLED RIVET HOLES.
“M” SUFFIXED TO THE DASH NUMBER INDICATES CRES NUTS, WITHOUT SILVER PLATE,
WITH DRY FILM LUBRICANT.
“W” SUFFIXED TO THE DASH NUMBER INDICATES PROJECT WELD NIBS FOR CRES SILVER PLATED PARTS ONLY (NO SILVER PLATE ON WELD NIBS).
“X” IN PLACE OF DASH INDICATES CADMIUM PLATED NUTS WITHOUT DRY FILM LUBRICANT.
EXAMPLES OF PART NUMBERS:
STEEL
NAS1 789-4 = .2500-28 UNJF-3B THREAD, PLAIN RIVET HOLES, CADMIUM PLATED WITH DRY FILM LUBRICANT.
NAS1 789-4K = .2500-28 UNJF-3B THREAD, DIMPLED RIVET HOLES, CADMIUM PLATED WITH RY FILM LUBRICANT.
NAS1 789X4 = .2500-28 UNJF-3B THREAD, PLAIN RIVET HOLES, CADMIUM PLATED AND WITHOUT DRY FILM LUBRICANT.
NAS1 789X4K = .2500-28 UNJF-3B THREAD, DIMPLED RIVET HOLES, CADMIUM PLATED AND WITHOUT DRY FILM LUBRICANT.
CRES
NAS1 789C4 = .2500-28 UNJF-3B THREAD, PLAIN RIVET HOLES, SILVER PLATED.
NAS1 789C4K = .2500-28 UNJF-3B THREAD, DIMPLED RIVET HOLES, SILVER PLATED.
NAS1 789C4W = .2500-28 UNJF-3B THREAD, WELD NIBS, SILVER PLATED.
NAS1 789C4M = .2500-28 UNJF-3B THREAD, PLAIN RIVET HOLES, DRY FILM LUBRICATED.
NAS1 789C4MK = .2500-28 UNJF-3B THREAD, DIMPLED RIVET HOLES, DRY FILM LUBRICATED.
NOTES:
/1 / MARK “C” ON CRES PARTS, LOCATION OPTIONAL.
/2/ RAISED OR DEPRESSED DOT FOR 1 60 KSI IDENTIFICATION, LOCATION OPTIONAL.
/3/ MFR’S ID, LOCATION OPTIONAL.
/4/ 2K MINIMUM DIAMETER CLEARANCE FOR ATTACHING RIVETS.

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