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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

Lockring Howmet Part Number

RLRR38SB9

Lockring Military Part Number

MS51990-108P
Internal Thread Lock1 Yes

A - Internal Thread, Class 3B

0.3750-24 UNJF

B - External Thread

0.5000-20

B - External Thread - Pitch Diameter

0.4678-0.4698 in

B - External Thread - Minor Diameter

0.4325-0.4409 in

C - Length ±.015

0.620 in

D ±.015

0.420 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.