Item # RJ205SN7L, RJ200 Inserts - Ring Locked, Fine Internal and Coarse External Threads On Howmet Aerospace

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Unit of Measure

Insert Type	N/A Standard
Series	N/A RJ200
Material Type	N/A 4340 Steel (Alternate 4140 Steel)
Material Specification	N/A AMS-S-5000 or AMS-S-5625
Heat Treat	N/A 160-180 KSI UTS
Finish	N/A Cadmium plate per QQ-P-416, Type II, Class 3
Military Part Number	N/A MS51991-205
Lockring Rosan Part Number	N/A RLRR24SA7
Lockring Military Part Number	N/A AS51990-105P
Internal Thread Lock	N/A Yes
A - Internal Thread, Class 3B¹	N/A 0.1900-32 UNJF
B - External Thread	N/A 0.3125-18
B - External Thread - Pitch Diameter	N/A 0.2769-0.2789 in
B - External Thread - Minor Diameter	N/A 0.2373-0.2468 in
C - Overall Length ±.015	N/A 0.440 in
D - Thread Length ±.015	N/A 0.290 in
E ±.015	N/A 0.150 in
F - Dia	N/A 0.248 in
G - Dia	N/A 0.237 in
H - Dia	N/A 0.196-0.206 in
J - Number of Teeth	N/A 17.000
K +2º -1º	N/A 86.000 º
L - Diameter +.007 -.002	N/A 0.284 in
M - Diameter +.005 -.004	N/A 0.255 in
N ±.015	N/A 0.090 in

Aluminum Step Drill Part Number²	N/A RCDC24-257
Magnesium Step Drill Part Number³	N/A RCADC24-257
Basic Tap Size⁴	N/A 0.3125-18 UNC
Wrench Part Number	N/A R1105W
Lockring Drive Tool Part Number	N/A R205D
Removal Drill Size⁵	N/A F

N/A

The external thread has a special pitch diameter and minor diameter, which installs into an AS8879 Class 3B, FED-STD-H28/2 Class 3B, or National Class 3 tapped hole.
<3> Mating lockring is not included with insert. It must be ordered separately.
<4> For standard lenghts as shown in table, "C" overall length and "D" thread length applies. For non-standard lengths, "C" lengths is in 1/16 inch increments and "E" dimension applies in place of "D" dimension.
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.

Insert Type