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Unit of Measure

Insert Type

Standard

Series

RJ300

Material Type

303 CRES

Material Specification

ASTM A582 or AMS 5640

Heat Treat

None

Finish

Passivate per AMS2700

Lockring Howmet Part Number

RLRR38SB9

Lockring Military Part Number

MS51990-108P
Internal Thread Lock1 No

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.