Howmet Fastening Systems
Howmet Fastening Systems
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Technical Support +1 310 784 6409
Email: HFSTechSupport@howmet.com
Website: www.hfs.howmet.com
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RLR Type lockrings have been inactive for new design since 1969 and are superseded by the improved "RLRR" type lockrings. "RLR" type lockrings will be provided for existing designs, however, it will normally be advantageous from a price and delivery standpoint to substitute the "RLRR" type lockring (ref. MS51990).

RLR Series Lock Rings
Unit of Measure
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Item #

Basic Lockring Size

Material Type

Material Specification

Heat Treat

Finish

C - Thickness

RLR16SU5 N/A 16 N/A A286 CRES N/A AMS 5731 or AMS 5732 or AMS 5734 or AMS 5737 N/A 269 HB Min N/A Passivate per AMS2700 N/A 0.084 in
RLR18SU6 N/A 18 N/A A286 CRES N/A AMS 5731 or AMS 5732 or AMS 5734 or AMS 5737 N/A 269 HB Min N/A Passivate per AMS2700 N/A 0.099 in
RLR21SU6 N/A 21 N/A A286 CRES N/A AMS 5731 or AMS 5732 or AMS 5734 or AMS 5737 N/A 269 HB Min N/A Passivate per AMS2700 N/A 0.099 in
RLR23SU7 N/A 23 N/A A286 CRES N/A AMS 5731 or AMS 5732 or AMS 5734 or AMS 5737 N/A 269 HB Min N/A Passivate per AMS2700 N/A 0.123 in
RLR27SU8 N/A 27 N/A A286 CRES N/A AMS 5731 or AMS 5732 or AMS 5734 or AMS 5737 N/A 269 HB Min N/A Passivate per AMS2700 N/A 0.138 in
RLR28SU8 N/A 28 N/A A286 CRES N/A AMS 5731 or AMS 5732 or AMS 5734 or AMS 5737 N/A 269 HB Min N/A Passivate per AMS2700 N/A 0.138 in
RLR31SU9 N/A 31 N/A A286 CRES N/A AMS 5731 or AMS 5732 or AMS 5734 or AMS 5737 N/A 269 HB Min N/A Passivate per AMS2700 N/A 0.145 in
RLR33SU9 N/A 33 N/A A286 CRES N/A AMS 5731 or AMS 5732 or AMS 5734 or AMS 5737 N/A 269 HB Min N/A Passivate per AMS2700 N/A 0.145 in
RLR38SU9 N/A 38 N/A A286 CRES N/A AMS 5731 or AMS 5732 or AMS 5734 or AMS 5737 N/A 269 HB Min N/A Passivate per AMS2700 N/A 0.145 in
RLR43SU9 N/A 43 N/A A286 CRES N/A AMS 5731 or AMS 5732 or AMS 5734 or AMS 5737 N/A 269 HB Min N/A Passivate per AMS2700 N/A 0.145 in
RLR47SU10 N/A 47 N/A A286 CRES N/A AMS 5731 or AMS 5732 or AMS 5734 or AMS 5737 N/A 269 HB Min N/A Passivate per AMS2700 N/A 0.161 in
RLR56SU11 N/A 56 N/A A286 CRES N/A AMS 5731 or AMS 5732 or AMS 5734 or AMS 5737 N/A 269 HB Min N/A Passivate per AMS2700 N/A 0.176 in
RLR64SU11 N/A 64 N/A A286 CRES N/A AMS 5731 or AMS 5732 or AMS 5734 or AMS 5737 N/A 269 HB Min N/A Passivate per AMS2700 N/A 0.176 in
RLR72SU11 N/A 72 N/A A286 CRES N/A AMS 5731 or AMS 5732 or AMS 5734 or AMS 5737 N/A 269 HB Min N/A Passivate per AMS2700 N/A 0.176 in
RLR82SU12 N/A 82 N/A A286 CRES N/A AMS 5731 or AMS 5732 or AMS 5734 or AMS 5737 N/A 269 HB Min N/A Passivate per AMS2700 N/A 0.193 in
RLR90SU12 N/A 90 N/A A286 CRES N/A AMS 5731 or AMS 5732 or AMS 5734 or AMS 5737 N/A 269 HB Min N/A Passivate per AMS2700 N/A 0.193 in
RLR100SU12 N/A 100 N/A A286 CRES N/A AMS 5731 or AMS 5732 or AMS 5734 or AMS 5737 N/A 269 HB Min N/A Passivate per AMS2700 N/A 0.193 in
RLR124SU12 N/A 124 N/A A286 CRES N/A AMS 5731 or AMS 5732 or AMS 5734 or AMS 5737 N/A 269 HB Min N/A Passivate per AMS2700 N/A 0.193 in
RLR160SU12 N/A 160 N/A A286 CRES N/A AMS 5731 or AMS 5732 or AMS 5734 or AMS 5737 N/A 269 HB Min N/A Passivate per AMS2700 N/A 0.193 in
RLR16S3C5 N/A 16 N/A 718 CRES N/A AMS 5662 N/A 230 KSI UTS Min N/A Passivate per AMS2700 N/A 0.084 in
RLR18S3C6 N/A 18 N/A 718 CRES N/A AMS 5662 N/A 230 KSI UTS Min N/A Passivate per AMS2700 N/A 0.099 in
RLR21S3C6 N/A 21 N/A 718 CRES N/A AMS 5662 N/A 230 KSI UTS Min N/A Passivate per AMS2700 N/A 0.099 in
RLR23S3C7 N/A 23 N/A 718 CRES N/A AMS 5662 N/A 230 KSI UTS Min N/A Passivate per AMS2700 N/A 0.123 in
RLR24S3C7 N/A 24 N/A 718 CRES N/A AMS 5662 N/A 230 KSI UTS Min N/A Passivate per AMS2700 N/A 0.112 in
RLR27S3C8 N/A 27 N/A 718 CRES N/A AMS 5662 N/A 230 KSI UTS Min N/A Passivate per AMS2700 N/A 0.138 in
Unit of Measure
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