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THREAD: AS8879
MATERIAL:
4037 alloy steel per AMS 6300 (UNS G40370). Heat treat - Rc 39-43.
8740 alloy steel per AMS 6322 (UNS G87400). Heat treat - Rc 39-44.
FINISH: Cadmium plate per AMS-QQ-P-416, Type II, Class 2 and Kaynar K76 water soluble lubricant (cetyl alcohol).
PERFORMANCE: NASM25027, except as follows:
  1. Axial tensile strength as tabulated.
  2. Maximum locking torque as tabulated.
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Item #

A - MAX

B - MIN

C - MIN

D - MIN

H - MAX

M - MIN

W

Axial Tensile Strength (LBS. MIN)

Locking Torque (IN-LBS. MAX)

Approx. Weight (LBS/100)

Thread

H51132-06K7 N/A 0.244 N/A 0.214 N/A 0.207 N/A 0.168 N/A 0.200 N/A 0.060 N/A 0.189-0.181 N/A 1150 N/A 15 N/A 0.120 N/A 0.1380-32 UNJC-3B
H51132-3K7 N/A 0.322 N/A 0.292 N/A 0.277 N/A 0.194 N/A 0.240 N/A 0.090 N/A 0.251-0.243 N/A 2460 N/A 15 N/A 0.190 N/A 0.1900-32 UNJF-3B
H51132-4K7 N/A 0.416 N/A 0.390 N/A 0.348 N/A 0.254 N/A 0.380 N/A 0.090 N/A 0.313-0.305 N/A 4580 N/A 20 N/A 0.350 N/A 0.2500-28 UNJF-3B
H51132-5K7 N/A 0.512 N/A 0.480 N/A 0.419 N/A 0.317 N/A 0.320 N/A 0.090 N/A 0.376-0.367 N/A 7390 N/A 30 N/A 0.600 N/A 0.3125-24 UNJF-3B
H51132-6K7 N/A 0.605 N/A 0.573 N/A 0.491 N/A 0.379 N/A 0.360 N/A 0.090 N/A 0.439-0.430 N/A 11450 N/A 40 N/A 0.900 N/A 0.3750-24 UNJF-3B
H51132-8K7 N/A 0.805 N/A 0.773 N/A 0.631 N/A 0.518 N/A 0.480 N/A 0.090 N/A 0.564-0.553 N/A 21110 N/A 80 N/A 1.780 N/A 0.5000-20 UNJF-3B
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