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  • Nut, Self - Locking, Double Hex, High Tensile, 180.000 PSI, 250° F 
MATERIAL: Alloy steel AISI 8740 or equivalent.

FINISH : Cadmium plate AMS-QQ-P-416, Type II, class 2.

LOCKING INSERT: Gold color nylon (250° F max. performance).

MAGNETIC PARTICLE INSPECTION: Parts individually inspected in accordance with military specification MIL-I-6868.

THREADS: In accordance with AS 8879.

PERFORMANCE : NASM 25027, except Min Tensile Strenght equivalent at to 180.000 PSI at 98% of the basic pitch diameter, for sizes -4, -5 and the basic diameter for sizes -6 and larger. The values tabuled above will be obtained when Tensile tested on a Bolt having a minimum Tensile Strength of 200.000 PSI.

APPLICATION: This design is suited for application involving high strength Bolts such as NASM 21250 and the 20004 Series.

Contact Howmet for the diameter/type in manufacturing.
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Item #

A -.000 / -.010

C - REF

H - MAX

V - REF

W - MAX

W - MIN

Thread

Part Family

N/A 0.531 Inch N/A 0.420 Inch N/A 0.334 Inch N/A 0.090 Inch N/A 0.376 Inch N/A 0.367 Inch N/A 0.2500-28 UNJF-3B N/A DHN 35
N/A 0.593 Inch N/A 0.491 Inch N/A 0.396 Inch N/A 0.090 Inch N/A 0.439 Inch N/A 0.430 Inch N/A 0.3125-24 UNJF-3B N/A DHN 35
N/A 0.687 Inch N/A 0.562 Inch N/A 0.453 Inch N/A 0.099 Inch N/A 0.502 Inch N/A 0.492 Inch N/A 0.3750-24 UNJF-3B N/A DHN 35
N/A 0.781 Inch N/A 0.633 Inch N/A 0.516 Inch N/A 0.107 Inch N/A 0.564 Inch N/A 0.553 Inch N/A 0.4375-20 UNJF-3B N/A DHN 35
N/A 0.875 Inch N/A 0.704 Inch N/A 0.563 Inch N/A 0.118 Inch N/A 0.627 Inch N/A 0.616 Inch N/A 0.5000-20 UNJF-3B N/A DHN 35
N/A 0.968 Inch N/A 0.774 Inch N/A 0.625 Inch N/A 0.127 Inch N/A 0.690 Inch N/A 0.679 Inch N/A 0.5625-18 UNJF-3B N/A DHN 35
N/A 1.062 Inch N/A 0.882 Inch N/A 0.672 Inch N/A 0.136 Inch N/A 0.783 Inch N/A 0.772 Inch N/A 0.6250-18 UNJF-3B N/A DHN 35
N/A 1.250 Inch N/A 1.059 Inch N/A 0.781 Inch N/A 0.185 Inch N/A 0.940 Inch N/A 0.928 Inch N/A 0.7500-16 UNJF-3B N/A DHN 35
N/A 1.438 Inch N/A 1.200 Inch N/A 0.953 Inch N/A 0.219 Inch N/A 1.064 Inch N/A 1.052 Inch N/A 0.8750-14 UNJF-3B N/A DHN 35
N/A 1.625 Inch N/A 1.343 Inch N/A 1.125 Inch N/A 0.328 Inch N/A 1.190 Inch N/A 1.177 Inch N/A 1.000-14 UNJS-3B N/A DHN 35
N/A 1.875 Inch N/A 1.556 Inch N/A 1.296 Inch N/A 0.438 Inch N/A 1.377 Inch N/A 1.364 Inch N/A 1.125-12 UNJF-3B N/A DHN 35
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