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THREAD: AS8879
MATERIAL: 7075 aluminum alloy per AMS-QQ-A-225/9.
Aged to T73 condition per AMS277.
FINISH:
  • KFN626-(*) - Anodized per MIL-A-8625, Type II, Class 2, color black and K76 lubricant.
  • KFN626-(*)A - Anodized per MIL-A-8625, Type II, Class 2, color black and cetyl alcohol lubricant per A/DET0013.
PERFORMANCE: NASM25027, except as follows:
  • 1 cycle use.
  • Maximum locking torque and axial tensile strength to be met when tested with aluminum IVD coated titanium bolts with AS8879 threads having a reduced major diameter such as NAS6803 thru NAS6808.
  • Wrench torque as tabulated.
PACKAGING: Parts are normally supplied in bulk packaging. Add "S" after dash number for spindle packaged nuts for use with K-Fast® automatic tools. (Example: KFN626-4S).
NOTES: "C" and "W" dimensions apply before forming self-locking feature.
Unit of Measure

Specifications

A - MAX

 N/A 0.865

B - MIN

 N/A 0.777

C - MIN

 N/A 0.631

D - MIN

 N/A 0.504

H - MAX

 N/A 0.445

M

 N/A 0.110-0.100

S - MIN

 N/A 0.160

W

 N/A 0.564-0.553

Axial Tensile Strength (LBS. MIN)

 N/A 12500

Locking Torque (LBF-IN)

 N/A 80.0-18.0

Approx. Weight (LBS/100)

 N/A 1.260

Finish

 N/A Anodized per MIL-A-8625, Type II, Class 2, Color Black and K76 Lubricant

Packaging

 N/A Bulk

Thread Type

 N/A Unified

Configuration 1

 N/A 6 Point

Simplified Material

 N/A Aluminum

Strength

 N/A 80KSI - 550Mpa

Temperature

 N/A 250°F - 120°C

Thread

 N/A 0.5000-20 UNJF-3B