Howmet Aerospace - RLRR Series Lock Rings

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Unit of Measure

Items	RLRR16SA5 RLRR Series Lock Rings	RLRR18SA6 RLRR Series Lock Rings	RLRR21SA6 RLRR Series Lock Rings	RLRR24SA7 RLRR Series Lock Rings	RLRR28SA8 RLRR Series Lock Rings
Basic Lockring Size	N/A 16	N/A 18	N/A 21	N/A 24	N/A 28
Material Type¹	N/A 4130 Steel or 4140 Steel or 8740 Steel
Material Specification	N/A AMS 6370 (4130 Steel), AMS 6382 (4140 Steel), AMS 6322 (8740 Steel)
Heat Treat	N/A 36-45 HRc per AMS 2759
Finish	N/A Cadmium Plate per AMS-QQ-P-416, Type II, Class 3
A - Dia ±.005	N/A 0.223 in	N/A 0.255 in	N/A 0.298 in	N/A 0.343 in	N/A 0.400 in
B - Thickness ±.005	N/A 0.084 in	N/A 0.099 in	N/A 0.099 in	N/A 0.112 in	N/A 0.138 in
C ±.005	N/A 0.027 in	N/A 0.040 in	N/A 0.040 in	N/A 0.040 in	N/A 0.040 in
E - Dia +.004 -.003	N/A 0.161 in	N/A 0.189 in	N/A 0.213 in	N/A 0.266 in	N/A 0.323 in
F - Diameter	N/A 0.189 in	N/A 0.223 in	N/A 0.252 in	N/A 0.315 in	N/A 0.364 in
G - Dia +.005 -.004	N/A 0.274 in	N/A 0.308 in	N/A 0.354 in	N/A 0.399 in	N/A 0.468 in
H - Dia +.003 -.006	N/A 0.246 in	N/A 0.279 in	N/A 0.324 in	N/A 0.363 in	N/A 0.430 in
J - Nr. of Internal Serrations	N/A 14.000	N/A 16.000	N/A 13.000	N/A 17.000	N/A 20.000
K +1º -2º	N/A 102.000 º	N/A 90.000 º	N/A 102.000 º	N/A 86.000 º	N/A 102.000 º
M - Nr. of External Serrations (Total Teeth; Both Segments)	N/A 10.000	N/A 10.000	N/A 12.000	N/A 12.000	N/A 14.000
N	N/A 100.000 º	N/A 100.000 º	N/A 90.000 º	N/A 90.000 º	N/A 90.000 º
R - Radius, 2 Places	N/A 0.120 in	N/A 0.135 in	N/A 0.159 in	N/A 0.180 in	N/A 0.214 in
¹ The Preferred Alloy Steel Material is the 4130, 4140 or 8740 (SA code).