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Unit of Measure

Series

N/A SFC S2

Stud Material

N/A 8740 Steel or 4130 Steel

Material Specification

N/A AMS 6322 or AMS-S-6758

Stud Heat Treat

N/A 26-34 HRc

Finish

N/A Cadmium Plate per AMS- QQ-P-416, Type II, Class 3

Lockring Drive Tool Part Number

N/A SFC25D16

Lockring Material

N/A 4130 Steel per AMS 6370, 4140 Steel per AMS 6382, or 8740 Steel per AMS 6322 FN-0208-80HT per ASTM B484, Grade I, Class C, Type I, (Powder Metal Nickel Steel)

Lockring Heat Treart

N/A 36-45 HRC for 4130 Steel, 4130 Steel, 4140 Steel, or 8740 Steel FN-02-80HT, Apparent Hardness 63 HRA Min

Nut End Type

N/A Drilled

T1 Nut End Thread Size AS8879

N/A 0.2500-28 UNJF-3A

T2 Nut End Thread Size AS8879

N/A 0.2500-20 UNJC 3A

T3 Thread Size AS8879

N/A 0.2500-20 UNJC 3B

B Min

N/A 0.375 in

C ±.020

N/A 0.610 in

D +.005 -.002

N/A 0.067 in

E

N/A 0.160 in

F - Min

N/A 0.623 in

G +.020 -.000

N/A 0.128 in

H - Min

N/A 0.750 in

J - Min

N/A 0.850 in

K +.003 -.000

N/A 0.337 in

M - Boss Dia Min

N/A 0.440 in

L ±.015

N/A 1.125 in

R - Ring Dia +.005 -.004

N/A 0.354 in

A Min. Full Thread Length

N/A 0.688 in

Notes

N/A
  • Nut End Length dimension is applicable when Lockring is against stop.
  • <5>Partial Cadmium Plating Coverage on serration area under lockring is acceptable.