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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RL Series Lock Rings
Unit of Measure
1 2 3 4 

Item #

Basic Lockring Size

Material Type

Material Specification

Heat Treat

Finish

C - Thickness

RL47SA8 N/A 47 N/A 4130 Steel or 4140 Steel or 8740 Steel N/A AMS 6370 (4130 Steel), AMS 6382 (4140 Steel), AMS 6322 (8740 Steel) N/A 36-45 HRc per AMS 2759 N/A Cadmium Plate per AMS-QQ-P-416, Type II, Class 3 N/A 0.130 in
RL47SM8 N/A 47 N/A 303 Se CRES N/A ASTM A582 or AMS 5640 N/A None N/A Passivate per AMS2700 N/A 0.130 in
RL47SU8 N/A 47 N/A A286 CRES N/A AMS 5731 or AMS 5732 or AMS 5734 or AMS 5737 N/A 32-40 HRc N/A Passivate per AMS2700 N/A 0.130 in
RL47S3C8 N/A 47 N/A 718 CRES N/A AMS 5662 N/A 230 KSI UTS Min N/A Passivate per AMS2700 N/A 0.130 in
RL47SS8 N/A 47 N/A 4340 Steel N/A AMS-S-5000 N/A 150-165 KSI UTS N/A Cadmium Plate per AMS-QQ-P-416, Type II, Class 3 N/A 0.130 in
RL47SA10 N/A 47 N/A 4130 Steel or 4140 Steel or 8740 Steel N/A AMS 6370 (4130 Steel), AMS 6382 (4140 Steel), AMS 6322 (8740 Steel) N/A 36-45 HRc per AMS 2759 N/A Cadmium Plate per AMS-QQ-P-416, Type II, Class 3 N/A 0.161 in
RL47SM10 N/A 47 N/A 303 Se CRES N/A ASTM A582 or AMS 5640 N/A None N/A Passivate per AMS2700 N/A 0.161 in
RL47SU10 N/A 47 N/A A286 CRES N/A AMS 5731 or AMS 5732 or AMS 5734 or AMS 5737 N/A 32-40 HRc N/A Passivate per AMS2700 N/A 0.161 in
RL47S3C10 N/A 47 N/A 718 CRES N/A AMS 5662 N/A 230 KSI UTS Min N/A Passivate per AMS2700 N/A 0.161 in
RL47SS10 N/A 47 N/A 4340 Steel N/A AMS-S-5000 N/A 150-165 KSI UTS N/A Cadmium Plate per AMS-QQ-P-416, Type II, Class 3 N/A 0.161 in
RL50SA6 N/A 50 N/A 4130 Steel or 4140 Steel or 8740 Steel N/A AMS 6370 (4130 Steel), AMS 6382 (4140 Steel), AMS 6322 (8740 Steel) N/A 36-45 HRc per AMS 2759 N/A Cadmium Plate per AMS-QQ-P-416, Type II, Class 3 N/A 0.099 in
RL50SM6 N/A 50 N/A 303 Se CRES N/A ASTM A582 or AMS 5640 N/A None N/A Passivate per AMS2700 N/A 0.099 in
RL50SU6 N/A 50 N/A A286 CRES N/A AMS 5731 or AMS 5732 or AMS 5734 or AMS 5737 N/A 32-40 HRc N/A Passivate per AMS2700 N/A 0.099 in
RL50S3C6 N/A 50 N/A 718 CRES N/A AMS 5662 N/A 230 KSI UTS Min N/A Passivate per AMS2700 N/A 0.099 in
RL50SS6 N/A 50 N/A 4340 Steel N/A AMS-S-5000 N/A 150-165 KSI UTS N/A Cadmium Plate per AMS-QQ-P-416, Type II, Class 3 N/A 0.099 in
RL56SA6 N/A 56 N/A 4130 Steel or 4140 Steel or 8740 Steel N/A AMS 6370 (4130 Steel), AMS 6382 (4140 Steel), AMS 6322 (8740 Steel) N/A 36-45 HRc per AMS 2759 N/A Cadmium Plate per AMS-QQ-P-416, Type II, Class 3 N/A 0.099 in
RL56SM6 N/A 56 N/A 303 Se CRES N/A ASTM A582 or AMS 5640 N/A None N/A Passivate per AMS2700 N/A 0.099 in
RL56SU6 N/A 56 N/A A286 CRES N/A AMS 5731 or AMS 5732 or AMS 5734 or AMS 5737 N/A 32-40 HRc N/A Passivate per AMS2700 N/A 0.099 in
RL56S3C6 N/A 56 N/A 718 CRES N/A AMS 5662 N/A 230 KSI UTS Min N/A Passivate per AMS2700 N/A 0.099 in
RL56SS6 N/A 56 N/A 4340 Steel N/A AMS-S-5000 N/A 150-165 KSI UTS N/A Cadmium Plate per AMS-QQ-P-416, Type II, Class 3 N/A 0.099 in
RL56SA8 N/A 56 N/A 4130 Steel or 4140 Steel or 8740 Steel N/A AMS 6370 (4130 Steel), AMS 6382 (4140 Steel), AMS 6322 (8740 Steel) N/A 36-45 HRc per AMS 2759 N/A Cadmium Plate per AMS-QQ-P-416, Type II, Class 3 N/A 0.130 in
RL56SM8 N/A 56 N/A 303 Se CRES N/A ASTM A582 or AMS 5640 N/A None N/A Passivate per AMS2700 N/A 0.130 in
RL56SU8 N/A 56 N/A A286 CRES N/A AMS 5731 or AMS 5732 or AMS 5734 or AMS 5737 N/A 32-40 HRc N/A Passivate per AMS2700 N/A 0.130 in
RL56S3C8 N/A 56 N/A 718 CRES N/A AMS 5662 N/A 230 KSI UTS Min N/A Passivate per AMS2700 N/A 0.130 in
RL56SS8 N/A 56 N/A 4340 Steel N/A AMS-S-5000 N/A 150-165 KSI UTS N/A Cadmium Plate per AMS-QQ-P-416, Type II, Class 3 N/A 0.130 in
RL56SA11 N/A 56 N/A 4130 Steel or 4140 Steel or 8740 Steel N/A AMS 6370 (4130 Steel), AMS 6382 (4140 Steel), AMS 6322 (8740 Steel) N/A 36-45 HRc per AMS 2759 N/A Cadmium Plate per AMS-QQ-P-416, Type II, Class 3 N/A 0.176 in
RL56SM11 N/A 56 N/A 303 Se CRES N/A ASTM A582 or AMS 5640 N/A None N/A Passivate per AMS2700 N/A 0.176 in
RL56SU11 N/A 56 N/A A286 CRES N/A AMS 5731 or AMS 5732 or AMS 5734 or AMS 5737 N/A 32-40 HRc N/A Passivate per AMS2700 N/A 0.176 in
RL56S3C11 N/A 56 N/A 718 CRES N/A AMS 5662 N/A 230 KSI UTS Min N/A Passivate per AMS2700 N/A 0.176 in
RL56SS11 N/A 56 N/A 4340 Steel N/A AMS-S-5000 N/A 150-165 KSI UTS N/A Cadmium Plate per AMS-QQ-P-416, Type II, Class 3 N/A 0.176 in
RL64SA6 N/A 64 N/A 4130 Steel or 4140 Steel or 8740 Steel N/A AMS 6370 (4130 Steel), AMS 6382 (4140 Steel), AMS 6322 (8740 Steel) N/A 36-45 HRc per AMS 2759 N/A Cadmium Plate per AMS-QQ-P-416, Type II, Class 3 N/A 0.099 in
RL64SM6 N/A 64 N/A 303 Se CRES N/A ASTM A582 or AMS 5640 N/A None N/A Passivate per AMS2700 N/A 0.099 in
RL64SU6 N/A 64 N/A A286 CRES N/A AMS 5731 or AMS 5732 or AMS 5734 or AMS 5737 N/A 32-40 HRc N/A Passivate per AMS2700 N/A 0.099 in
RL64S3C6 N/A 64 N/A 718 CRES N/A AMS 5662 N/A 230 KSI UTS Min N/A Passivate per AMS2700 N/A 0.099 in
RL64SS6 N/A 64 N/A 4340 Steel N/A AMS-S-5000 N/A 150-165 KSI UTS N/A Cadmium Plate per AMS-QQ-P-416, Type II, Class 3 N/A 0.099 in
RL64SA8 N/A 64 N/A 4130 Steel or 4140 Steel or 8740 Steel N/A AMS 6370 (4130 Steel), AMS 6382 (4140 Steel), AMS 6322 (8740 Steel) N/A 36-45 HRc per AMS 2759 N/A Cadmium Plate per AMS-QQ-P-416, Type II, Class 3 N/A 0.138 in
RL64SM8 N/A 64 N/A 303 Se CRES N/A ASTM A582 or AMS 5640 N/A None N/A Passivate per AMS2700 N/A 0.138 in
RL64SU8 N/A 64 N/A A286 CRES N/A AMS 5731 or AMS 5732 or AMS 5734 or AMS 5737 N/A 32-40 HRc N/A Passivate per AMS2700 N/A 0.138 in
RL64S3C8 N/A 64 N/A 718 CRES N/A AMS 5662 N/A 230 KSI UTS Min N/A Passivate per AMS2700 N/A 0.138 in
RL64SS8 N/A 64 N/A 4340 Steel N/A AMS-S-5000 N/A 150-165 KSI UTS N/A Cadmium Plate per AMS-QQ-P-416, Type II, Class 3 N/A 0.138 in
RL64SA11 N/A 64 N/A 4130 Steel or 4140 Steel or 8740 Steel N/A AMS 6370 (4130 Steel), AMS 6382 (4140 Steel), AMS 6322 (8740 Steel) N/A 36-45 HRc per AMS 2759 N/A Cadmium Plate per AMS-QQ-P-416, Type II, Class 3 N/A 0.176 in
RL64SM11 N/A 64 N/A 303 Se CRES N/A ASTM A582 or AMS 5640 N/A None N/A Passivate per AMS2700 N/A 0.176 in
RL64SU11 N/A 64 N/A A286 CRES N/A AMS 5731 or AMS 5732 or AMS 5734 or AMS 5737 N/A 32-40 HRc N/A Passivate per AMS2700 N/A 0.176 in
RL64S3C11 N/A 64 N/A 718 CRES N/A AMS 5662 N/A 230 KSI UTS Min N/A Passivate per AMS2700 N/A 0.176 in
RL64SS11 N/A 64 N/A 4340 Steel N/A AMS-S-5000 N/A 150-165 KSI UTS N/A Cadmium Plate per AMS-QQ-P-416, Type II, Class 3 N/A 0.176 in
RL72SA6 N/A 72 N/A 4130 Steel or 4140 Steel or 8740 Steel N/A AMS 6370 (4130 Steel), AMS 6382 (4140 Steel), AMS 6322 (8740 Steel) N/A 36-45 HRc per AMS 2759 N/A Cadmium Plate per AMS-QQ-P-416, Type II, Class 3 N/A 0.099 in
RL72SM6 N/A 72 N/A 303 Se CRES N/A ASTM A582 or AMS 5640 N/A None N/A Passivate per AMS2700 N/A 0.099 in
RL72SU6 N/A 72 N/A A286 CRES N/A AMS 5731 or AMS 5732 or AMS 5734 or AMS 5737 N/A 32-40 HRc N/A Passivate per AMS2700 N/A 0.099 in
RL72S3C6 N/A 72 N/A 718 CRES N/A AMS 5662 N/A 230 KSI UTS Min N/A Passivate per AMS2700 N/A 0.099 in
RL72SS6 N/A 72 N/A 4340 Steel N/A AMS-S-5000 N/A 150-165 KSI UTS N/A Cadmium Plate per AMS-QQ-P-416, Type II, Class 3 N/A 0.099 in
RL72SA8 N/A 72 N/A 4130 Steel or 4140 Steel or 8740 Steel N/A AMS 6370 (4130 Steel), AMS 6382 (4140 Steel), AMS 6322 (8740 Steel) N/A 36-45 HRc per AMS 2759 N/A Cadmium Plate per AMS-QQ-P-416, Type II, Class 3 N/A 0.130 in
RL72SM8 N/A 72 N/A 303 Se CRES N/A ASTM A582 or AMS 5640 N/A None N/A Passivate per AMS2700 N/A 0.130 in
RL72SU8 N/A 72 N/A A286 CRES N/A AMS 5731 or AMS 5732 or AMS 5734 or AMS 5737 N/A 32-40 HRc N/A Passivate per AMS2700 N/A 0.130 in
RL72S3C8 N/A 72 N/A 718 CRES N/A AMS 5662 N/A 230 KSI UTS Min N/A Passivate per AMS2700 N/A 0.130 in
RL72SS8 N/A 72 N/A 4340 Steel N/A AMS-S-5000 N/A 150-165 KSI UTS N/A Cadmium Plate per AMS-QQ-P-416, Type II, Class 3 N/A 0.130 in
RL72SA11 N/A 72 N/A 4130 Steel or 4140 Steel or 8740 Steel N/A AMS 6370 (4130 Steel), AMS 6382 (4140 Steel), AMS 6322 (8740 Steel) N/A 36-45 HRc per AMS 2759 N/A Cadmium Plate per AMS-QQ-P-416, Type II, Class 3 N/A 0.176 in
RL72SM11 N/A 72 N/A 303 Se CRES N/A ASTM A582 or AMS 5640 N/A None N/A Passivate per AMS2700 N/A 0.176 in
RL72SU11 N/A 72 N/A A286 CRES N/A AMS 5731 or AMS 5732 or AMS 5734 or AMS 5737 N/A 32-40 HRc N/A Passivate per AMS2700 N/A 0.176 in
RL72S3C11 N/A 72 N/A 718 CRES N/A AMS 5662 N/A 230 KSI UTS Min N/A Passivate per AMS2700 N/A 0.176 in
RL72SS11 N/A 72 N/A 4340 Steel N/A AMS-S-5000 N/A 150-165 KSI UTS N/A Cadmium Plate per AMS-QQ-P-416, Type II, Class 3 N/A 0.176 in
RL82SA6 N/A 82 N/A 4130 Steel or 4140 Steel or 8740 Steel N/A AMS 6370 (4130 Steel), AMS 6382 (4140 Steel), AMS 6322 (8740 Steel) N/A 36-45 HRc per AMS 2759 N/A Cadmium Plate per AMS-QQ-P-416, Type II, Class 3 N/A 0.099 in
RL82SM6 N/A 82 N/A 303 Se CRES N/A ASTM A582 or AMS 5640 N/A None N/A Passivate per AMS2700 N/A 0.099 in
RL82SU6 N/A 82 N/A A286 CRES N/A AMS 5731 or AMS 5732 or AMS 5734 or AMS 5737 N/A 32-40 HRc N/A Passivate per AMS2700 N/A 0.099 in
RL82S3C6 N/A 82 N/A 718 CRES N/A AMS 5662 N/A 230 KSI UTS Min N/A Passivate per AMS2700 N/A 0.099 in
RL82SS6 N/A 82 N/A 4340 Steel N/A AMS-S-5000 N/A 150-165 KSI UTS N/A Cadmium Plate per AMS-QQ-P-416, Type II, Class 3 N/A 0.099 in
RL82SA12 N/A 82 N/A 4130 Steel or 4140 Steel or 8740 Steel N/A AMS 6370 (4130 Steel), AMS 6382 (4140 Steel), AMS 6322 (8740 Steel) N/A 36-45 HRc per AMS 2759 N/A Cadmium Plate per AMS-QQ-P-416, Type II, Class 3 N/A 0.193 in
RL82SM12 N/A 82 N/A 303 Se CRES N/A ASTM A582 or AMS 5640 N/A None N/A Passivate per AMS2700 N/A 0.193 in
RL82SU12 N/A 82 N/A A286 CRES N/A AMS 5731 or AMS 5732 or AMS 5734 or AMS 5737 N/A 32-40 HRc N/A Passivate per AMS2700 N/A 0.193 in
RL82S3C12 N/A 82 N/A 718 CRES N/A AMS 5662 N/A 230 KSI UTS Min N/A Passivate per AMS2700 N/A 0.193 in
RL82SS12 N/A 82 N/A 4340 Steel N/A AMS-S-5000 N/A 150-165 KSI UTS N/A Cadmium Plate per AMS-QQ-P-416, Type II, Class 3 N/A 0.193 in
RL90SA6 N/A 90 N/A 4130 Steel or 4140 Steel or 8740 Steel N/A AMS 6370 (4130 Steel), AMS 6382 (4140 Steel), AMS 6322 (8740 Steel) N/A 36-45 HRc per AMS 2759 N/A Cadmium Plate per AMS-QQ-P-416, Type II, Class 3 N/A 0.099 in
RL90SM6 N/A 90 N/A 303 Se CRES N/A ASTM A582 or AMS 5640 N/A None N/A Passivate per AMS2700 N/A 0.099 in
RL90SU6 N/A 90 N/A A286 CRES N/A AMS 5731 or AMS 5732 or AMS 5734 or AMS 5737 N/A 32-40 HRc N/A Passivate per AMS2700 N/A 0.099 in
RL90S3C6 N/A 90 N/A 718 CRES N/A AMS 5662 N/A 230 KSI UTS Min N/A Passivate per AMS2700 N/A 0.099 in
RL90SS6 N/A 90 N/A 4340 Steel N/A AMS-S-5000 N/A 150-165 KSI UTS N/A Cadmium Plate per AMS-QQ-P-416, Type II, Class 3 N/A 0.099 in
RL90SA12 N/A 90 N/A 4130 Steel or 4140 Steel or 8740 Steel N/A AMS 6370 (4130 Steel), AMS 6382 (4140 Steel), AMS 6322 (8740 Steel) N/A 36-45 HRc per AMS 2759 N/A Cadmium Plate per AMS-QQ-P-416, Type II, Class 3 N/A 0.193 in
RL90SM12 N/A 90 N/A 303 Se CRES N/A ASTM A582 or AMS 5640 N/A None N/A Passivate per AMS2700 N/A 0.193 in
RL90SU12 N/A 90 N/A A286 CRES N/A AMS 5731 or AMS 5732 or AMS 5734 or AMS 5737 N/A 32-40 HRc N/A Passivate per AMS2700 N/A 0.193 in
RL90S3C12 N/A 90 N/A 718 CRES N/A AMS 5662 N/A 230 KSI UTS Min N/A Passivate per AMS2700 N/A 0.193 in
RL90SS12 N/A 90 N/A 4340 Steel N/A AMS-S-5000 N/A 150-165 KSI UTS N/A Cadmium Plate per AMS-QQ-P-416, Type II, Class 3 N/A 0.193 in
RL100SA1512 N/A 100 N/A 4130 Steel or 4140 Steel or 8740 Steel N/A AMS 6370 (4130 Steel), AMS 6382 (4140 Steel), AMS 6322 (8740 Steel) N/A 36-45 HRc per AMS 2759 N/A Cadmium Plate per AMS-QQ-P-416, Type II, Class 3 N/A 0.193 in
RL100SM12 N/A 100 N/A 303 Se CRES N/A ASTM A582 or AMS 5640 N/A None N/A Passivate per AMS2700 N/A 0.193 in
RL100SU12 N/A 100 N/A A286 CRES N/A AMS 5731 or AMS 5732 or AMS 5734 or AMS 5737 N/A 32-40 HRc N/A Passivate per AMS2700 N/A 0.193 in
RL100S3C12 N/A 100 N/A 718 CRES N/A AMS 5662 N/A 230 KSI UTS Min N/A Passivate per AMS2700 N/A 0.193 in
RL100SS12 N/A 100 N/A 4340 Steel N/A AMS-S-5000 N/A 150-165 KSI UTS N/A Cadmium Plate per AMS-QQ-P-416, Type II, Class 3 N/A 0.193 in
RL124SA12 N/A 124 N/A 4130 Steel or 4140 Steel or 8740 Steel N/A AMS 6370 (4130 Steel), AMS 6382 (4140 Steel), AMS 6322 (8740 Steel) N/A 36-45 HRc per AMS 2759 N/A Cadmium Plate per AMS-QQ-P-416, Type II, Class 3 N/A 0.193 in
RL124SM12 N/A 124 N/A 303 Se CRES N/A ASTM A582 or AMS 5640 N/A None N/A Passivate per AMS2700 N/A 0.193 in
RL124SU12 N/A 124 N/A A286 CRES N/A AMS 5731 or AMS 5732 or AMS 5734 or AMS 5737 N/A 32-40 HRc N/A Passivate per AMS2700 N/A 0.193 in
RL124S3C12 N/A 124 N/A 718 CRES N/A AMS 5662 N/A 230 KSI UTS Min N/A Passivate per AMS2700 N/A 0.193 in
RL124SS12 N/A 124 N/A 4340 Steel N/A AMS-S-5000 N/A 150-165 KSI UTS N/A Cadmium Plate per AMS-QQ-P-416, Type II, Class 3 N/A 0.193 in
RL146SA6 N/A 146 N/A 4130 Steel or 4140 Steel or 8740 Steel N/A AMS 6370 (4130 Steel), AMS 6382 (4140 Steel), AMS 6322 (8740 Steel) N/A 36-45 HRc per AMS 2759 N/A Cadmium Plate per AMS-QQ-P-416, Type II, Class 3 N/A 0.099 in
RL146SM6 N/A 146 N/A 303 Se CRES N/A ASTM A582 or AMS 5640 N/A None N/A Passivate per AMS2700 N/A 0.099 in
RL146SU6 N/A 146 N/A A286 CRES N/A AMS 5731 or AMS 5732 or AMS 5734 or AMS 5737 N/A 32-40 HRc N/A Passivate per AMS2700 N/A 0.099 in
RL146S3C6 N/A 146 N/A 718 CRES N/A AMS 5662 N/A 230 KSI UTS Min N/A Passivate per AMS2700 N/A 0.099 in
RL146SS6 N/A 146 N/A 4340 Steel N/A AMS-S-5000 N/A 150-165 KSI UTS N/A Cadmium Plate per AMS-QQ-P-416, Type II, Class 3 N/A 0.099 in
RL160SA12 N/A 160 N/A 4130 Steel or 4140 Steel or 8740 Steel N/A AMS 6370 (4130 Steel), AMS 6382 (4140 Steel), AMS 6322 (8740 Steel) N/A 36-45 HRc per AMS 2759 N/A Cadmium Plate per AMS-QQ-P-416, Type II, Class 3 N/A 0.193 in
RL160SM12 N/A 160 N/A 303 Se CRES N/A ASTM A582 or AMS 5640 N/A None N/A Passivate per AMS2700 N/A 0.193 in
RL160SU12 N/A 160 N/A A286 CRES N/A AMS 5731 or AMS 5732 or AMS 5734 or AMS 5737 N/A 32-40 HRc N/A Passivate per AMS2700 N/A 0.193 in
RL160S3C12 N/A 160 N/A 718 CRES N/A AMS 5662 N/A 230 KSI UTS Min N/A Passivate per AMS2700 N/A 0.193 in
RL160SS12 N/A 160 N/A 4340 Steel N/A AMS-S-5000 N/A 150-165 KSI UTS N/A Cadmium Plate per AMS-QQ-P-416, Type II, Class 3 N/A 0.193 in
Unit of Measure
1 2 3 4