Item # R1104SF6, R1100 Series Inserts - Ring Locked, Solid Coarse External Threads On Howmet Aerospace

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Unit of Measure

Insert Type	N/A Solid
Series	N/A R1100
Material Type	N/A 17-4PH CRES
Material Specification	N/A AMS 5643
Heat Treat	N/A COND H1025
Finish	N/A Passivate per AMS2700
Lockring Rosan Part Number¹	N/A RLRR21SA6
Lockring Military Part Number²	N/A MS51990-104P
Internal Thread Lock	N/A No
A - Dia ±.005	N/A 0.197 in
B - External Thread	N/A 0.2500-20
B - External Thread - Major Diameter	N/A 0.2428-0.2500 in
B - External Thread - Pitch Diameter	N/A 0.2178-0.2198 in
B - External Thread - Minor Diameter	N/A 0.1824-0.1909 in
C ±.015	N/A 0.380 in
D ±.015	N/A 0.250 in
K - Dia	N/A 0.228-0.237 in
L ±.015	N/A 0.080 in
M - Dia ±.010	N/A 0.185 in

Aluminum Step Drill Part Number³	N/A RCDC21-201
Magnesium Step Drill Part Number⁴	N/A RCADC21-201
Basic Tap Size⁵	N/A 0.2500-20 UNC
Wrench Part Number	N/A R1104W
Lockring Drive Tool Part Number	N/A R1104D
Removal Drill Size⁶	N/A 19/64

N/A

The external thread has a special pitch diameter and minor diameter which installs into a AS8879 class 3B, FED-STD-H28/2 class 3B, or National class 3 tapped hole.
4130 Steel, 1117 Steel, 303 CRES, A286 CRES indicate standard materials.
125 Microinch Ra for surface roughness per ANSI/ASME B46.1, except:
- 250 Microinch Ra for serration
- 100 Microinch Ra for cut threads
- 63 Microinch Ra for ground or rolled threads.
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 Mating lockring is not included with insert. It must be ordered separately.
² Mating lockring is not included with insert. It must be ordered separately.
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 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.
⁵ Taps and Removal drills are available for order.
⁶ Taps and Removal drills are available for order.

Insert Type