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THREAD: AS8879
MATERIAL:
    • Nut

      8740 alloy steel per AMS-S-6049 AMS6322 (UNS G87400).

      4340 alloy steel per AMS5626 or AMS6415 (UNS G43400).

    4140 alloy steel per AMS-S-5000 AMS6382 (UNS G41400).
  • Washer
    No code, carbon steel per AMS5085 (UNS G10500).
    "C" code, A286 corrosion resistant steel per AMS5525 (UNS 566286).
HEAT TREAT:
    • Nut- Rc 39-43 per AMS-H-6875
    • Washer

      Rc 40-45 for carbon steel material.

    Rc 32 min. for A286 cres. material.
FINISH:
      KFN542-(*) - Nut and Washer - Cadmium plate per AMS-QQ-P-416, Type II, Class 2.

      KFN542C(*)DF

      Nut - Cadmium plate per AMS-QQ-P-416, Type II, Class 2 and dry film lubricant per AS5275.

      Washer - Passivate per AMS2700.

PERFORMANCE: KFS1009 except axial tensile strength as tabulated.
TEMPERATURE: 450&#176F
PACKAGING: Add "S" after dash number for spindle packaged nuts for use with K-Fast automatic tool (-05 thru -5 sizes only). Example: KFN542C(*)DFS.
NOTES:
  1. -05 size finish: Cadmium palted per AMS-QQ-P-416, Type II, Class 2, plus olive drab chromate finish for identification purposes.
  2. "C" and "W" dimensions apply before forming self-locking feature.
  3. Parts are supplied in assembled condition only.
Unit of Measure

Specifications

A - MAX

 N/A 0.363

C - MIN

 N/A 0.277

D

 N/A 0.228-0.223

H - MAX

 N/A 0.243

M

 N/A 0.097-0.087

P - MAX

 N/A 0.233

W

 N/A 0.251-0.243

Axial Tensile Strength (LBS. MIN)

 N/A 3470

Approx. Weight (LBS/100)

 N/A 0.240

Finish

 N/A Cadmium Plate per AMS-QQ-P-416, Type II, Class 2 plus Dry Film Lubricant per AS5275

Packaging

 N/A Bulk

Thread Type

 N/A Unified

Configuration 1

 N/A 6 Point

Configuration 2

 N/A Captive Washer

Simplified Material

 N/A Alloy Steel

Temperature

 N/A 450°F - 235°C

Thread

 N/A 0.1900-32 UNJF-3B