Item # RAJ107SN9L, RJ100 Inserts - Ring Locked, Coarse Internal and Coarse External Threads On Howmet Aerospace

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Unit of Measure

Insert Type	N/A Standard
Series	N/A RJ100
Material	N/A 4340 Steel (Alternate 4140 Steel)
Finish	N/A Cadmium Plate per AMS-QQ-P-416, Type II, Class 3
Material Specification	N/A AMS-S-5000 or AMS-S-5625
Military Part Number	N/A MS51991-107
Lockring Part Number	N/A RLRR33SA9
Lockring Military Part Number	N/A MS51990-107P
Internal Thread Lock	N/A Yes
A - Internal Thread, Class 3B	N/A 0.3125-18 UNJC
B - External Thread	N/A 0.5000-13
B - External Thread - Pitch Diameter	N/A 0.4506-0.4531 in
B - External Thread - Minor Diameter	N/A 0.3963-0.4087 in
C ± .015	N/A 0.560 in
D ± .015	N/A 0.360 in
Heat Treat	N/A 160-180 KSI UTS
E ± .015	N/A 0.200 in
F - Diameter	N/A 0.370 in
G - Diameter	N/A 0.396 in
H - Diameter	N/A 0.324-0.339 in
J - Number of Teeth	N/A 24.000
K +2º -1º	N/A 102.000 º
L - Diameter +.007 -.002	N/A 0.407 in
M - Diameter +.005 -.004	N/A 0.380 in
N ± .015	N/A 0.120 in

Aluminum Step Drill Part Number¹	N/A RCDC33-422
Magnesium Step Drill Part Number²	N/A RCDAC33-422
Basic Tap Size	N/A 0.5000-13UNC
Wrench Part Number	N/A R1107W
Locking Drive Tool	N/A RA107D
Removal Drill Size³	N/A V

N/A

The external thread has a special pitch diameter and minor diameter which installs into a AS8879 class 3B, MIL-S-7742 class 3B, or National class 3 tapped hole.
Inserts are installed and removed in accordance with MS51995.
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 should 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 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.
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 Removal Drills are not supplied by Howmet.

Insert Type