close
close
Please click here to view the Installation and Removal

Unit of Measure

Insert Type

N/A Blind

Series

N/A RJ2000

Material Type

N/A 303 CRES

Material Specification

N/A AMS-A582 or AMS 5640

Heat Treat

N/A None

Finish

N/A Passivate per AMS2700

Lockring Rosan Part Number

N/A RLRR28SA8

Lockring Military Part Number

N/A MS51990-106P

Internal Thread Lock

N/A No
A - Internal Thread, Class 3B1 N/A 0.2500-20 UNJC

B - External Thread

N/A 0.3750-16

B - External Thread - Pitch Diameter

N/A 0.3347-0.3372 in

B - External Thread - Minor Diameter

N/A 0.2906-0.3011 in

C - Length ±.015

N/A 0.620 in

D ±.015

N/A 0.450 in

E - Min. Full Thread Depth

N/A 0.310 in
Aluminum Step Drill Part Number2 N/A RCDC28-312S
Magnesium Step Drill Part Number3 N/A RCADC28-312S
Basic Tap Size4 N/A 0.3750-16 UNC

Wrench Part Number

N/A R1106W

Lockring Drive Tool Part Number

N/A R206D
Removal Drill Size5 N/A 5/16

N/A

  • The external thread has a special pitch diameter and minor diameter which installs into an AS8879 Class 3B, MIL-S-7742 Class 3B, or National Class 3 tapped hole.
  • Mating lockring is not included with insert, it must be ordered separately.
  • Unless otherwise specified dimensions are in inches & ASME Y14.5M.
  • When parent material surface is not flat or normal to axis of hole, provide a spotface for proper lockring entry.
  • Remove all burrs and sharp edges.

  • 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.