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THREAD: AS8879
MATERIAL: A286 corrosion resistant steel per AMS5732 (UNS S66286) or AMS5737.
HEAT TREAT: Rc 33-44.
FINISH: Passivate per AMS2700 and Kaylube molybdenum disulfide dry lubricant coat per AS5272, Type I.
PERFORMANCE: NASM25027, except maximum locking torque and axial tensile strength as tabulated. Thread locking and breakaway values shall apply for five reusability cycles, on a titanium bolt.
APPLICATION: For use on standard to .032 oversize shank bolts.
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: KFN670-5S.
NOTES: "C" and "W" dimensions apply before forming self-locking feature.
Unit of Measure

Specifications

A - MAX

 N/A 0.425

B - MIN

 N/A 0.398

C - MIN

 N/A 0.348

D

 N/A 0.288-0.284

H - MAX

 N/A 0.331

M

 N/A 0.117-0.107

W

 N/A 0.313-0.305

Axial Tensile Strength (LBS. MIN)

 N/A 5000

Rec'm Seating Torque (LBF-IN)

 N/A 110-130

Minimum Breakaway Torque (LBF-IN)

 N/A 3.5

Maximum Installation (LBF-IN)

 N/A 15

Approx. Weight (LBS/100)

 N/A 0.410

Packaging

 N/A Spindle

Thread Type

 N/A Unified

Configuration 1

 N/A 6 Point

Simplified Material

 N/A CRES

Strength

 N/A 160KSI - 1100Mpa

Temperature

 N/A 450°F - 235°C

Thread

 N/A 0.2500-28 UNJF-3B