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Unit of Measure

Insert Type

N/A Standard

Series

N/A RDJ900

Material Type

N/A 4340 Steel (Alternate 4140 Steel)

Material Specification

N/A MIL-S-5000 (MIL-S-5625)

Heat Treat

N/A 160-180 KSI UTS

Finish

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

Lockring Rosan Part Number

N/A RLRR31SA9

Internal Thread Lock

N/A Yes
A - Internal Thread, Class 3B1 N/A 0.3125-18 UNJC

B - External Thread

N/A 0.4375-20

B - External Thread - Pitch Diameter

N/A 0.4053-0.4073 in

B - External Thread - Minor Diameter

N/A 0.3700-0.3784 in

C - Dia ±.005

N/A 0.323 in

D ±.005

N/A 0.095 in

E - Length ±.015

N/A 0.560 in

F ±.015

N/A 0.380 in

N/A

  • The external thread has a special pitch diameter and minor diameter which installs into a MIL-S-8879 Class 3B, MIL-S-7742 Class 3B, or National Class 3 tapped hole.
  • Insert lengths shown are based on installation in 2024-T4 Aluminum and in such materials will accommodate tension loads up to the strength of a mating bolt heat treated to 145,000 PSI UTS. If this design criteria is required in parent materials of lower mechanical properties, longer insert lengths should be specified. Mating bolts have a thread engagement of 1.5 diameters or if insert has a thread lock, the bolt should extend through the insert 2 pitches including chamfer.
  • Mating lockring is not included with insert. It must be ordered separately.

  • 1 MIL-S-8879 Internal Thread