Howmet Fastening Systems
Howmet Fastening Systems
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RLR Type lockrings have been inactive for new design since 1969 and are superseded by the improved "RLRR" type lockrings.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

RLR27SG8 N/A 27 N/A 416 CRES N/A ASTM A581 or ASTM A582 N/A None N/A Passivate N/A 0.138 in
RLR28SG8 N/A 28 N/A 416 CRES N/A ASTM A581 or ASTM A582 N/A None N/A Passivate N/A 0.138 in
RLR31SG9 N/A 31 N/A 416 CRES N/A ASTM A581 or ASTM A582 N/A None N/A Passivate N/A 0.145 in
RLR33SG9 N/A 33 N/A 416 CRES N/A ASTM A581 or ASTM A582 N/A None N/A Passivate N/A 0.145 in
RLR38SG9 N/A 38 N/A 416 CRES N/A ASTM A581 or ASTM A582 N/A None N/A Passivate N/A 0.145 in
RLR43SG9 N/A 43 N/A 416 CRES N/A ASTM A581 or ASTM A582 N/A None N/A Passivate N/A 0.145 in
RLR47SG10 N/A 47 N/A 416 CRES N/A ASTM A581 or ASTM A582 N/A None N/A Passivate N/A 0.161 in
RLR56SG11 N/A 56 N/A 416 CRES N/A ASTM A581 or ASTM A582 N/A None N/A Passivate N/A 0.176 in
RLR64SG11 N/A 64 N/A 416 CRES N/A ASTM A581 or ASTM A582 N/A None N/A Passivate N/A 0.176 in
RLR72SG11 N/A 72 N/A 416 CRES N/A ASTM A581 or ASTM A582 N/A None N/A Passivate N/A 0.176 in
RLR82SG12 N/A 82 N/A 416 CRES N/A ASTM A581 or ASTM A582 N/A None N/A Passivate N/A 0.193 in
RLR90SG12 N/A 90 N/A 416 CRES N/A ASTM A581 or ASTM A582 N/A None N/A Passivate N/A 0.193 in
RLR100SG12 N/A 100 N/A 416 CRES N/A ASTM A581 or ASTM A582 N/A None N/A Passivate N/A 0.193 in
RLR124SG12 N/A 124 N/A 416 CRES N/A ASTM A581 or ASTM A582 N/A None N/A Passivate N/A 0.193 in
RLR160SG12 N/A 160 N/A 416 CRES N/A ASTM A581 or ASTM A582 N/A None N/A Passivate N/A 0.193 in
RLR18SM6 N/A 18 N/A 303 CRES N/A ASTM A581, ASTM A582 or AMS 5640 N/A None N/A Passivate per AMS2700 N/A 0.099 in
RLR21SM6 N/A 21 N/A 303 CRES N/A ASTM A581, ASTM A582 or AMS 5640 N/A None N/A Passivate per AMS2700 N/A 0.099 in
RLR23SM7 N/A 23 N/A 303 CRES N/A ASTM A581, ASTM A582 or AMS 5640 N/A None N/A Passivate per AMS2700 N/A 0.123 in
RLR27SM8 N/A 27 N/A 303 CRES N/A ASTM A581, ASTM A582 or AMS 5640 N/A None N/A Passivate per AMS2700 N/A 0.138 in
RLR31SM9 N/A 31 N/A 303 CRES N/A ASTM A581, ASTM A582 or AMS 5640 N/A None N/A Passivate per AMS2700 N/A 0.145 in
RLR33SM9 N/A 33 N/A 303 CRES N/A ASTM A581, ASTM A582 or AMS 5640 N/A None N/A Passivate per AMS2700 N/A 0.145 in
RLR43SM9 N/A 43 N/A 303 CRES N/A ASTM A581, ASTM A582 or AMS 5640 N/A None N/A Passivate per AMS2700 N/A 0.145 in
RLR47SM10 N/A 47 N/A 303 CRES N/A ASTM A581, ASTM A582 or AMS 5640 N/A None N/A Passivate per AMS2700 N/A 0.161 in
RLR56SM11 N/A 56 N/A 303 CRES N/A ASTM A581, ASTM A582 or AMS 5640 N/A None N/A Passivate per AMS2700 N/A 0.176 in
RLR64SM11 N/A 64 N/A 303 CRES N/A ASTM A581, ASTM A582 or AMS 5640 N/A None N/A Passivate per AMS2700 N/A 0.176 in
Unit of Measure
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