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  • KFN511 - 6 Point Self-Locking, Deep C'Bore
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.
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Request Information Compare Items Search by Specification

Item #

A - MAX

B - MIN

C - MIN

D

D

H - MAX

M

M

W

W

X

Axial Tensile Strength (LBS. MIN)

Rec'm Seating Torque (LBF-IN)

Max. Locking Torque

Approx. Weight (LBS/100)

Thread

N/A 0.330 N/A 0.295 N/A 0.277 N/A 0.228-0.224 N/A 0.228 in N/A 0.269 N/A 0.112-0.102 N/A 0.112 in N/A 0.251-0.243 N/A 0.251 in N/A 0.005 N/A 2750 N/A 40-50 N/A 11.000 lb·in N/A 0.210 N/A 0.1900-32 UNJF-3B
N/A 0.425 N/A 0.398 N/A 0.348 N/A 0.288-0.284 N/A 0.288 in N/A 0.331 N/A 0.117-0.107 N/A 0.117 in N/A 0.313-0.305 N/A 0.313 in N/A 0.005 N/A 5000 N/A 115-130 N/A 20.000 lb·in N/A 0.410 N/A 0.2500-28 UNJF-3B
N/A 0.525 N/A 0.497 N/A 0.419 N/A 0.350-0.346 N/A 0.350 in N/A 0.352 N/A 0.127-0.117 N/A 0.127 in N/A 0.376-0.367 N/A 0.376 in N/A 0.005 N/A 8300 N/A 200-250 N/A 45.000 lb·in N/A 0.610 N/A 0.3125-24 UNJF-3B
N/A 0.290 N/A 0.273 N/A 0.242 N/A 0.202-0.198 N/A 0.202 in N/A 0.251 N/A 0.112-0.102 N/A 0.112 in N/A 0.220-0.212 N/A 0.220 in N/A 0.005 N/A 2300 N/A 30-40 N/A 11.000 lb·in N/A 0.160 N/A 0.1640-32 UNJC-3B
N/A 0.330 N/A 0.295 N/A 0.277 N/A 0.228-0.224 N/A 0.228 in N/A 0.269 N/A 0.112-0.102 N/A 0.112 in N/A 0.251-0.243 N/A 0.251 in N/A 0.005 N/A 2750 N/A 40-50 N/A 11.000 lb·in N/A 0.210 N/A 0.1900-32 UNJF-3B
N/A 0.425 N/A 0.398 N/A 0.348 N/A 0.288-0.284 N/A 0.288 in N/A 0.331 N/A 0.117-0.107 N/A 0.117 in N/A 0.313-0.305 N/A 0.313 in N/A 0.005 N/A 5000 N/A 115-130 N/A 20.000 lb·in N/A 0.410 N/A 0.2500-28 UNJF-3B
N/A 0.525 N/A 0.497 N/A 0.419 N/A 0.350-0.346 N/A 0.350 in N/A 0.352 N/A 0.127-0.117 N/A 0.127 in N/A 0.376-0.367 N/A 0.376 in N/A 0.005 N/A 8300 N/A 200-250 N/A 45.000 lb·in N/A 0.610 N/A 0.3125-24 UNJF-3B
N/A 0.290 N/A 0.273 N/A 0.242 N/A 0.202-0.198 N/A 0.202 in N/A 0.251 N/A 0.112-0.102 N/A 0.112 in N/A 0.220-0.212 N/A 0.220 in N/A 0.005 N/A 2300 N/A 30-40 N/A 11.000 lb·in N/A 0.160 N/A 0.1640-32 UNJC-3B
N/A 0.330 N/A 0.295 N/A 0.277 N/A 0.228-0.224 N/A 0.228 in N/A 0.269 N/A 0.112-0.102 N/A 0.112 in N/A 0.251-0.243 N/A 0.251 in N/A 0.005 N/A 2750 N/A 40-50 N/A 11.000 lb·in N/A 0.210 N/A 0.1900-32 UNJF-3B
N/A 0.425 N/A 0.398 N/A 0.348 N/A 0.288-0.284 N/A 0.288 in N/A 0.331 N/A 0.117-0.107 N/A 0.117 in N/A 0.313-0.305 N/A 0.313 in N/A 0.005 N/A 5000 N/A 115-130 N/A 20.000 lb·in N/A 0.410 N/A 0.2500-28 UNJF-3B
N/A 0.525 N/A 0.497 N/A 0.419 N/A 0.350-0.346 N/A 0.350 in N/A 0.352 N/A 0.127-0.117 N/A 0.127 in N/A 0.376-0.367 N/A 0.376 in N/A 0.005 N/A 8300 N/A 200-250 N/A 45.000 lb·in N/A 0.610 N/A 0.3125-24 UNJF-3B
N/A 0.290 N/A 0.273 N/A 0.242 N/A 0.202-0.198 N/A 0.202 in N/A 0.251 N/A 0.112-0.102 N/A 0.112 in N/A 0.220-0.212 N/A 0.220 in N/A 0.005 N/A 2300 N/A 30-40 N/A 11.000 lb·in N/A 0.160 N/A 0.1640-32 UNJC-3B
N/A 0.330 N/A 0.295 N/A 0.277 N/A 0.228-0.224 N/A 0.228 in N/A 0.269 N/A 0.112-0.102 N/A 0.112 in N/A 0.251-0.243 N/A 0.251 in N/A 0.005 N/A 2750 N/A 40-50 N/A 11.000 lb·in N/A 0.210 N/A 0.1900-32 UNJF-3B
N/A 0.425 N/A 0.398 N/A 0.348 N/A 0.288-0.284 N/A 0.288 in N/A 0.331 N/A 0.117-0.107 N/A 0.117 in N/A 0.313-0.305 N/A 0.313 in N/A 0.005 N/A 5000 N/A 115-130 N/A 20.000 lb·in N/A 0.410 N/A 0.2500-28 UNJF-3B
N/A 0.525 N/A 0.497 N/A 0.419 N/A 0.350-0.346 N/A 0.350 in N/A 0.352 N/A 0.127-0.117 N/A 0.127 in N/A 0.376-0.367 N/A 0.376 in N/A 0.005 N/A 8300 N/A 200-250 N/A 45.000 lb·in N/A 0.610 N/A 0.3125-24 UNJF-3B
N/A 0.290 N/A 0.273 N/A 0.242 N/A 0.202-0.198 N/A 0.202 in N/A 0.251 N/A 0.112-0.102 N/A 0.112 in N/A 0.220-0.212 N/A 0.220 in N/A 0.005 N/A 2300 N/A 30-40 N/A 11.000 lb·in N/A 0.160 N/A 0.1640-32 UNJC-3B
N/A 0.330 N/A 0.295 N/A 0.277 N/A 0.228-0.224 N/A 0.228 in N/A 0.269 N/A 0.112-0.102 N/A 0.112 in N/A 0.251-0.243 N/A 0.251 in N/A 0.005 N/A 2750 N/A 40-50 N/A 11.000 lb·in N/A 0.210 N/A 0.1900-32 UNJF-3B
N/A 0.425 N/A 0.398 N/A 0.348 N/A 0.288-0.284 N/A 0.288 in N/A 0.331 N/A 0.117-0.107 N/A 0.117 in N/A 0.313-0.305 N/A 0.313 in N/A 0.005 N/A 5000 N/A 115-130 N/A 20.000 lb·in N/A 0.410 N/A 0.2500-28 UNJF-3B
N/A 0.525 N/A 0.497 N/A 0.419 N/A 0.350-0.346 N/A 0.350 in N/A 0.352 N/A 0.127-0.117 N/A 0.127 in N/A 0.376-0.367 N/A 0.376 in N/A 0.005 N/A 8300 N/A 200-250 N/A 45.000 lb·in N/A 0.610 N/A 0.3125-24 UNJF-3B
N/A 0.290 N/A 0.273 N/A 0.242 N/A 0.202-0.198 N/A 0.202 in N/A 0.251 N/A 0.112-0.102 N/A 0.112 in N/A 0.220-0.212 N/A 0.220 in N/A 0.005 N/A 2300 N/A 30-40 N/A 11.000 lb·in N/A 0.160 N/A 0.1640-32 UNJC-3B
N/A 0.330 N/A 0.295 N/A 0.277 N/A 0.228-0.224 N/A 0.228 in N/A 0.269 N/A 0.112-0.102 N/A 0.112 in N/A 0.251-0.243 N/A 0.251 in N/A 0.005 N/A 2750 N/A 40-50 N/A 11.000 lb·in N/A 0.210 N/A 0.1900-32 UNJF-3B
N/A 0.425 N/A 0.398 N/A 0.348 N/A 0.288-0.284 N/A 0.288 in N/A 0.331 N/A 0.117-0.107 N/A 0.117 in N/A 0.313-0.305 N/A 0.313 in N/A 0.005 N/A 5000 N/A 115-130 N/A 20.000 lb·in N/A 0.410 N/A 0.2500-28 UNJF-3B
N/A 0.525 N/A 0.497 N/A 0.419 N/A 0.350-0.346 N/A 0.350 in N/A 0.352 N/A 0.127-0.117 N/A 0.127 in N/A 0.376-0.367 N/A 0.376 in N/A 0.005 N/A 8300 N/A 200-250 N/A 45.000 lb·in N/A 0.610 N/A 0.3125-24 UNJF-3B
N/A 0.290 N/A 0.273 N/A 0.242 N/A 0.202-0.198 N/A 0.202 in N/A 0.251 N/A 0.112-0.102 N/A 0.112 in N/A 0.220-0.212 N/A 0.220 in N/A 0.005 N/A 2300 N/A 30-40 N/A 11.000 lb·in N/A 0.160 N/A 0.1640-32 UNJC-3B
N/A 0.330 N/A 0.295 N/A 0.277 N/A 0.228-0.224 N/A 0.228 in N/A 0.269 N/A 0.112-0.102 N/A 0.112 in N/A 0.251-0.243 N/A 0.251 in N/A 0.005 N/A 2750 N/A 40-50 N/A 11.000 lb·in N/A 0.210 N/A 0.1900-32 UNJF-3B
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