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THREAD: AS8879
MATERIAL: A286 corrosion resistant steel per AMS5732 or AMS5737 (UNS S66286).
HEAT TREAT: Rc 33-44
FINISH:
  • KFN511C(*) - Passivate per AMS2700, cadmium plate per AMS-QQ-P-416, Type II, Class 2, plus cetyl alcohol lubricant.
  • KFN511DL(*) - Passivate per AMS2700 and Kaylube molybdenum disulfide dry lubricant coat per AS5272.
  • KFN511E(*) - Passivate per AMS2700, silver plate per AMS2410, plus cetyl alcohol lubricant.
  • KFN511J(*) - Silver plate per AMS2410.
  • KFN511K(*) - Lubeco 905 solid film lubricant.
  • KFN511V(*) - Lubeco 2123 solid film lubricant.
PERFORMANCE: KFS 1011, except as follows:
  • Axial tensile strength as tabulated.
  • Recommended seating torque as tabulated.
  • Maximum locking torque as tabulated.
  • Metallurgical examination (microstructure) required per 33A056.
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, or "SS" for parts on "short spindles" for use on lightweight K-Fast® automatic tools. Spindle packaged parts apply thru -5 nuts only.(Example: KFN511C3S or KFN511C3SS).
NOTES: "C" and "W" dimensions apply prior to 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

D

 N/A 0.288 in

H - MAX

 N/A 0.331

M

 N/A 0.117-0.107

M

 N/A 0.117 in

W

 N/A 0.313-0.305

W

 N/A 0.313 in

X

 N/A 0.005

Axial Tensile Strength (LBS. MIN)

 N/A 5000

Rec'm Seating Torque (LBF-IN)

 N/A 115-130

Max. Locking Torque

 N/A 20.000 lb·in

Approx. Weight (LBS/100)

 N/A 0.410

Finish

 N/A Passivate per AMS2700, Plus Kaylube Molybdenum Disulfide Dry Lubricant Coat per AS5272

Packaging

 N/A Bulk

Thread Type

 N/A Unified

Configuration 1

 N/A 6 Point

Simplified Material

 N/A CRES

Strength

 N/A 125KSI - 900Mpa

Temperature

 N/A 800°F - 425°C

Thread

 N/A 0.2500-28 UNJF-3B