Howmet Fastening Systems
Howmet Fastening Systems
Phone: Sales +1 800 992 4444
Technical Support +1 310 784 6409
Email: HFSTechSupport@howmet.com
Website: www.hfs.howmet.com
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Superseded by RL24( )7 for new design and applications where it is agreeable by customer to increase counterbore diameter. RL23( )7 will continue to be supplied for existing designs as required.

Unit of Measure

Specifications

Series

 N/A RL

Basic Lockring Size

 N/A 23
Material Type1 N/A 4340 Steel

Material Specification

 N/A AMS-S-5000

Heat Treat

 N/A 150-165 KSI UTS

Finish

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

A - Dia +.005 -.004

 N/A 0.389 in

B - Dia +.004 -.003

 N/A 0.266 in

C - Thickness

 N/A 0.123 in

D - Dia

 N/A 0.343 in

E - Nr. of External Serrations (Total Teeth), Approx

 N/A 24.000

F - Nr. of Internal Serrations

 N/A 17.000

Notes

N/A

  • Fillets rad 0.015 max.
  • Unless otherwise specified, break sharp edges 0.003-0.015, except serrations.
  • 1 The Preferred Alloy Steel Material is the 4130, 4140 or 8740 (SA code).