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Unit of Measure

Insert Type

Standard

Series

RJ300

Material Type

4130 Steel

Material Specification

AMS-S-6758, COND F

Heat Treat

125 KSI UTS min

Finish

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

Military Part Number

MS51991-313

Lockring Howmet Part Number

RLRR82SB12

Lockring Military Part Number

MS51990-113P
Internal Thread Lock1 Yes

A - Internal Thread, Class 3B

0.7500-16 UNJF

B - External Thread

1.1250-12

B - External Thread - Pitch Diameter

1.0716-1.0741 in

B - External Thread - Minor Diameter

1.0128-1.0260 in

C - Length ±.015

1.120 in

D ±.015

0.800 in
  • 1 AS8879 Internal Thread
  • 2 Step drills are designed for thru hole drilling. When used to drill a blind hole, it may be necessary to grind the drill to suit the depth required.
  • 3 Step drills are designed for thru hole drilling. When used to drill a blind hole, it may be necessary to grind the drill to suit the depth required.
  • 4 Taps are not supplied by Howmet.
  • 5 Removal drills are not supplied by Howmet.