Retaining Rings

ReliaMark offers a variety of retaining ring options for your applications, including internal snap rings (installed axially into a bore), external snap rings (installed radially onto a shaft) and E-clips (stamped clips for deep grooves with three prongs that yield high thrust load capacity). ReliaMark retaining rings are sold in convenient packs in a variety of popular sizes.

ReliaMark Retaining Rings

ReliaMark E-Clips

For pricing and availability, please click a part number.

Part Number Pack Qty Shaft Ring Groove
Decimal (Ds) Fraction (Ds) Free Outside Diameter (Dr) Thickness (T) Thinkness Tolerance Range Diameter (Dg) Diameter Tolerance Range Depth (d) Width (W) Width Tolerance Range
E0012PKRM 125 .125 1/8 .20 .015 +/-.002 .095 +.002/-.000 .015 .020 +.002/-.000
E0015PKRM 125 .156 5/32 .282 .025 +/-.002 .116 +.002/-.000 .020 .029 +.003/-.000
E0018PKRM 125 .188 3/16 .335 .025 +/-.002 .147 +.002/-.000 .015 .029 +.003/-.000
SE0021PKRM 125 .219 7/32 .437 .025 +/-.002 .188 +.002/-.000 .015 .029 +.003/-.000
E0025PKRM 125 .250 1/4 .527 .025 +/-.002 .210 +.003/-.000 .020 .029 +.003/-.000
SE0031PKRM 125 .312 5/16 .500 .025 +/-.002 .250 +.003/-.000 .031 .029 +.003/-.000
E0037PKRM 75 .375 3/8 .660 .035 +/-.002 .303 +.003/-.000 .036 .039 +.003/-.000
E0050PKRM 50 .500 1/2 .800 .042 +/-.002 .396 +.003/-.000 .052 .046 +.003/-.000
E0062PKRM 50 .625 5/8 .940 .042 +/-.002 .485 +.003/-.000 .070 .046 +.003/-.000

ReliaMark Internal Snap Rings

For pricing and availability, please click a part number.

Part Number Pack Qty Bore Ring Groove
Decimal (Ds) Fraction (Ds) Free Outside Diameter (Dr) Free OD Tolerance Range Radial Wall Thickness (S) Min Radial Wall Thickness (S) Max Think-ness (T) Thinkness Tolerance Range Diameter (Dg) Diameter Tolerance Range Depth (d) Width (W) Width Tolerance Range
HO0025PKRM 75 .250 1/4 .280 +.010/-.005 .015 .025 .015 +/-.002 .268 +/-.001 .009 .020 +.002/-.000
HO0031PKRM 75 .312 5/16 .346 +.010/-.005 .018 .033 .015 +/-.002 .330 +/-.001 .009 .020 +.002/-.000
HO0037PKRM 75 .375 3/8 .415 +.010/-.005 .028 .040 .025 +/-.002 .397 +/-.002 .011 .029 +.003/-.000
HO0043PKRM 50 .438 7/16 .482 +.010/-.005 .029 .049 .025 +/-.002 .461 +/-.002 .012 .029 +.003/-.000
HO0050PKRM 50 .500 1/2 .548 +.010/-.005 .035 .053 .035 +/-.002 .530 +/-.002 .015 .039 +.003/-.000
HO0056PKRM 50 .562 9/16 .620 +.010/-.005 .035 .053 .035 +/-.002 .596 +/-.002 .017 .039 +.003/-.000
HO0062PKRM 50 .625 5/8 .694 +.010/-.005 .035 .060 .035 +/-.002 .665 +/-.002 .020 .039 +.003/-.000
HO0068PKRM 50 .688 11/16 .763 +.010/-.005 .036 .063 .035 +/-.002 .732 +/-.002 .022 .039 +.003/-.000
HO0075PKRM 50 .750 3/4 .831 +.010/-.005 .040 .070 .035 +/-.002 .796 +/-.002 .023 .039 +.003/-.000
HO0081PKRM 25 .812 13/16 .901 +.015/-.010 .044 .077 .042 +/-.002 .862 +/-.003 .025 .046 +.003/-.000
HO0087PKRM 25 .875 7/8 .971 +.015/-.010 .045 .084 .042 +/-.002 .931 +/-.003 .028 .046 +.003/-.000
HO0093PKRM 25 .938 15/16 1.041 +.015/-.010 .050 .091 .042 +/-.002 1.000 +/-.003 .031 .046 +.003/-.000
HO0100PKRM 25 1.000 1 1.111 +.015/-.010 .052 .104 .042 +/-.002 1.066 +/-.003 .033 .046 +.003/-.000
HO0106PKRM 25 1.062 1-1/16 1.180 +.025/-.020 .055 .110 .050 +/-.002 1.130 +/-.004 .034 .056 +.004/-.000
HO0112PKRM 25 1.125 1-1/8 1.249 +.025/-.020 .057 .116 .050 +/-.002 1.197 +/-.004 .036 .056 +.004/-.000
HO0118PKRM 25 1.188 1-3/16 1.319 +.025/-.020 .058 .120 .050 +/-.002 1.262 +/-.004 .037 .056 +.004/-.000
HO0125PKRM 25 1.250 1-1/4 1.388 +.025/-.020 .062 .124 .050 +/-.002 1.330 +/-.004 .040 .056 +.004/-.000
HO0131PKRM 25 1.312 1-5/16 1.456 +.025/-.020 .062 .130 .050 +/-.002 1.396 +/-.004 .042 .056 +.004/-.000
HO0137PKRM 25 1.375 1-3/8 1.526 +.025/-.020 .063 .130 .050 +/-.002 1.461 +/-.004 .043 .056 +.004/-.000
HO0143PKRM 25 1.438 1-7/16 1.596 +.025/-.020 .065 .133 .050 +/-.002 1.528 +/-.004 .045 .056 +.004/-.000
HO0150PKRM 25 1.500 1-1/2 1.660 +.025/-.020 .066 .133 .050 +/-.002 1.596 +/-.004 .047 .056 +.004/-.000
HO0156PKRM 15 1.562 1-9/16 1.734 +.035/-.025 .078 .157 .062 +/-.003 1.658 +/-.005 .048 .068 +.004/-.000
HO0162PKRM 15 1.625 1-5/8 1.804 +.035/-.025 .082 .164 .062 +/-.003 1.725 +/-.005 .050 .068 +.004/-.000
HO0165PKRM 10 1.653 42mm 1.835 +.035/-.025 .083 .167 .062 +/-.003 1.755 +/-.005 .051 .068 +.004/-.000
HO0168PKRM 10 1.688 1-11/16 1.874 +.035/-.025 .085 .170 .062 +/-.003 1.792 +/-.005 .052 .068 +.004/-.000
HO0175PKRM 10 1.750 1-3/4 1.942 +.035/-.025 .083 .171 .062 +/-.003 1.858 +/-.005 .054 .068 +.004/-.000
HO0181PKRM 10 1.812 1-13/16 2.012 +.035/-.025 .084 .170 .062 +/-.003 1.922 +/-.005 .055 .068 +.004/-.000
HO0187PKRM 10 1.875 1-7/8 2.072 +.035/-.025 .085 .170 .062 +/-.003 1.989 +/-.005 .057 .068 +.004/-.000
HO0193PKRM 10 1.938 1-15/16 2.141 +.035/-.025 .085 .170 .062 +/-.003 2.056 +/-.005 .059 .068 +.004/-.000
HO0200PKRM 10 2.000 2 2.210 +.035/-.025 .085 .170 .062 +/-.003 2.122 +/-.005 .061 .068 +.004/-.000
HO0206PKRM 10 2.047 52mm 2.280 +.040/-.030 .091 .186 .078 +/-.003 2.171 +/-.006 .062 .086 +.005/-.000
HO0212PKRM 6 2.125 2-1/8 2.350 +.040/-.030 .096 .195 .078 +/-.003 2.251 +/-.006 .063 .086 +.005/-.000
HO0218PKRM 6 2.165 55mm 2.415 +.040/-.030 .098 .199 .078 +/-.003 2.295 +/-.006 .065 .086 +.005/-.000
HO0225PKRM 6 2.250 2-1/4 2.490 +.040/-.030 .099 .203 .078 +/-.003 2.382 +/-.006 .066 .086 +.005/-.000
HO0231PKRM 6 2.312 2-5/16 2.535 +.040/-.030 .100 .206 .078 +/-.003 2.450 +/-.006 .069 .086 +.005/-.000
HO0237PKRM 6 2.375 2-3/8 2.630 +.040/-.030 .102 .207 .078 +/-.003 2.517 +/-.006 .071 .086 +.005/-.000
HO0244PKRM 6 2.440 2-7/16 2.702 +.040/-.030 .103 .209 .078 +/-.003 2.584 +/-.006 .072 .086 +.005/-.000
HO0250PKRM 6 2.500 2-1/2 2.775 +.040/-.030 .103 .210 .078 +/-.003 2.648 +/-.006 .074 .086 +.005/-.000
HO0256PKRM 4 2.562 2-9/16 2.844 +.040/-.030 .109 .222 .093 +/-.003 2.714 +/-.006 .076 .103 +.005/-.000
HO0262PKRM 4 2.625 2-5/8 2.910 +.040/-.030 .111 .226 .093 +/-.003 2.781 +/-.006 .078 .103 +.005/-.000
HO0268PKRM 4 2.677 68mm 2.980 +.040/-.030 .113 .230 .093 +/-.003 2.837 +/-.006 .080 .103 +.005/-.000
HO0275PKRM 4 2.750 2-3/4 3.050 +.040/-.030 .115 .234 .093 +/-.003 2.914 +/-.006 .082 .103 +.005/-.000
HO0281PKRM 4 2.812 2-13/16 3.121 +.040/-.030 .115 .230 .093 +/-.003 2.980 +/-.006 .084 .103 +.005/-.000
HO0287PKRM 4 2.875 2-7/8 3.191 +.040/-.030 .120 .240 .093 +/-.003 3.051 +/-.006 .088 .103 +.005/-.000
HO0300PKRM 4 2.953 75mm 3.325 +.040/-.030 .122 .250 .093 +/-.003 3.135 +/-.006 .091 .103 +.005/-.000

ReliaMark External Snap Rings

For pricing and availability, please click a part number.

Part Number Pack Qty Bore Ring Groove
Decimal (Ds) Fraction (Ds) Free Inside Diameter (Df) Free OD Tolerance Range Radial Wall Thickness (S) Min Radial Wall Thickness (S) Max Thinkness (T) Thinkness Tolerance Range Diameter (Dg) Diameter Tolerance Range Depth (d) Width (W) Width Tolerance Range
SH0012PKRM 25 .125 1/8 .112 +.002/-.004 .011 .018 .010 +/-.001 .117 +/-.0015 .004 .012 +.002/-.000
SH0015PKRM 25 .156 5/32 .142 +.002/-.004 .016 .026 .010 +/-.001 .146 +/-.0015 .005 .012 +.002/-.000
SH0018PKRM 25 .188 3/16 .168 .+.002/ – .004 .016 .025 .015 +/-.002 .175 +/-.0015 .006 .018 +.002/-.000
SH0021PKRM 25 .219 7/32 .196 +.002/-.004 .017 .028 .015 +/-.002 .205 +/-.0015 .007 .018 +.002/-.000
SH0023PKRM 25 .236 15/64 .215 +.002/-.004 .019 .030 .015 +/-.002 .222 +/-.0015 .007 .018 +.002/-.000
SH0025PKRM 75 .250 1/4 .225 +.002/-.004 .025 .035 .025 +/-.002 .230 +/-.0015 .010 .029 +.003/-.000
SH0031PKRM 75 .312 5/16 .281 +.002/-.005 .026 .040 .025 +/-.002 .290 +/-.002 .011 .029 +.003/-.000
SH0037PKRM 75 .375 3/8 .338 +.002/-.005 .0305 .050 .025 +/-.002 .352 +/-.002 .012 .029 +.003/-.000
SH0043PKRM 50 .438 7/16 .395 +.002/-.005 .033 .055 .025 +/-.002 .412 +/-.002 .013 .029 +.003/-.000
SH0046PKRM 50 .469 15/32 .428 +.002/-.005 .035 .060 .025 +/-.002 .443 +/-.002 .013 .029 +.003/-.000
SH0050PKRM 50 .500 1/2 .461 +.002/-.005 .040 .065 .035 +/-.002 .468 +/-.002 .016 .039 +.003/-.000
SH0056PKRM 50 .562 9/16 .521 +.005/-.010 .041 .072 .035 +/-.002 .530 +/-.002 .016 .039 +.003/-.000
SH0059PKRM 50 .594 19/32 .550 +.005/-.010 .043 .076 .035 +/-.002 .559 +/-.003 .017 .039 +.003/-.000
SH0062PKRM 50 .625 5/8 .579 +.005/-.010 .045 .080 .035 +/-.002 .588 +/-.003 .018 .039 +.003/-.000
SH0066PKRM 50 .672 43/64 .621 +.005/-.010 .043 .082 .035 +/-.002 .631 +/-.003 .020 .039 +.003/-.000
SH0068PKRM 50 .688 11/16 .635 +.005/-.010 .048 .084 .042 +/-.002 .646 +/-.003 .021 .046 +.003/-.000
SH0075PKRM 50 .750 3/4 .693 +.005/-.010 .051 .092 .042 +/-.002 .704 +/-.003 .023 .046 +.003/-.000
SH0078PKRM 25 .781 25/32 .722 +.005/-.010 .052 .094 .042 +/-.002 .733 +/-.003 .024 .046 +.003/-.000
SH0081PKRM 25 .812 13/16 .751 +.005/-.010 .054 .096 .042 +/-.002 .762 +/-.003 .025 .046 +.003/-.000
SH0087PKRM 25 .875 7/8 .810 +.005/-.010 .057 .104 .042 +/-.002 .821 +/-.003 .027 .046 +.003/-.000
SH0093PKRM 25 .938 15/16 .867 +.005/-.010 .063 .110 .042 +/-.002 .882 +/-.003 .028 .046 +.003/-.000
SH0098PKRM 25 .984 63/64 .910 +.005/-.010 .064 .114 .042 +/-.002 .926 +/-.003 .029 .046 +.003/-.000
SH0100PKRM 25 1.000 1 .925 +.005/-.010 .065 .116 .042 +/-.002 .940 +/-.003 .030 .046 +.003/-.000
SH0102PKRM 25 1.023 26mm .946 +.005/-.010 .066 .118 .042 +/-.002 .961 +/-.003 .031 .046 +.003/-.000
SH0106PKRM 25 1.062 1-1/16 .982 +.010/-.015 .069 .122 .050 +/-.002 .998 +/-.004 .032 .056 +.004/-.000
SH0112PKRM 25 1.125 1-1/8 1.041 +.010/-.015 .071 .128 .050 +/-.002 1.059 +/-.004 .033 .056 +.004/-.000
SH0118PKRM 25 1.188 1-3/16 1.098 +.010/-.015 .072 .132 .050 +/-.002 1.118 +/-.004 .035 .056 +.004/-.000
SH0125PKRM 25 1.250 1-1/4 1.156 +.010/-.015 .076 .140 .050 +/-.002 1.176 +/-.004 .037 .056 +.004/-.000
SH0131PKRM 25 1.312 1-5/16 1.214 +.010/-.015 .076 .146 .050 +/-.002 1.232 +/-.004 .040 .056 +.004/-.000
SH0137PKRM 25 1.375 1-3/8 1.272 +.010/-.015 .082 .150 .050 +/-.002 1.291 +/-.004 .042 .056 +.004/-.000
SH0143PKRM 15 1.438 1-7/16 1.333 +.010/-.015 .086 .160 .050 +/-.002 1.350 +/-.004 .044 .056 +.004/-.000
SH0150PKRM 15 1.500 1-1/2 1.387 +.010/-.015 .091 .168 .050 +/-.002 1.406 +/-.004 .047 .056 +.004/-.000
SH0156PKRM 15 1.562 1-9/16 1.446 +.013/- .020 .093 .172 .062 +/-.003 1.468 +/-.005 .047 .068 +.004/-.000
SH0162PKRM 15 1.625 1-5/8 1.503 .020 .097 .180 .062 +/-.003 1.529 +/-.005 .048 .068 +.004/-.000
SH0168PKRM 10 1.688 1-11/16 1.560 +.013/- .020 .099 .184 .062 +/-.003 1.589 +/-.005 .049 .068 +.004/-.000
SH0175PKRM 10 1.750 1-3/4 1.618 +.013/- .020 .101 .188 .062 +/-.003 1.650 +/-.005 .050 .068 +.004/-.000
SH0177PKRM 10 1.772 45mm 1.637 +.013/- .020 .102 .190 .062 +/-.003 1.669 +/-.005 .051 .068 +.004/-.000
SH0181PKRM 10 1.812 1-13/16 1.675 +.013/- .020 .102 .192 .062 +/-.003 1.708 +/-.005 .052 .068 +.004/-.000
SH0187PKRM 10 1.772 1-7/8 1.735 +.013/- .020 .104 .196 .062 +/-.003 1.769 +/-.005 .053 .068 +.004/-.000
SH0196PKRM 10 1.969 1-32/33 1.819 +.013/- .020 .106 .200 .062 +/-.003 1.857 +/-.005 .056 .068 +.004/-.000
SH0200PKRM 10 2.000 2 1.850 +.013/- .020 .108 .204 .062 +/-.003 1.886 +/-.005 .057 .068 +.004/-.000
SH0206PKRM 5 2.062 2-1/16 1.906 +.015/-.025 .111 .208 .078 +/-.003 1.946 +/-.006 .058 .086 +.005/-.000
SH0212PKRM 5 2.125 2-1/8 1.964 +.015/-.025 .113 .212 .078 +/-.003 2.003 +/-.006 .061 .086 +.005/-.000
SH0215PKRM 5 2.156 2-5/32 1.993 +.015/-.025 .113 .212 .078 +/-.003 2.032 +/-.006 .062 .086 +.005/-.000
SH0225PKRM 5 2.250 2-1/4 2.081 +.015/-.025 .116 .220 .078 +/-.003 2.120 +/-.006 .065 .086 +.005/-.000
SH0231PKRM 5 2.312 2-5/16 2.139 +.015/-.025 .118 .222 .078 +/-.003 2.178 +/-.006 .067 .086 +.005/-.000
SH0237PKRM 5 2.375 2-3/8 2.197 +.015/-.025 .119 .224 .078 +/-.003 2.239 +/-.006 .068 .086 +.005/-.000
SH0243PKRM 5 2.438 2-7/16 2.255 +.015/-.025 .120 .228 .078 +/-.003 2.299 +/-.006 .069 .086 +.005/-.000
SH0250PKRM 5 2.500 2-1/2 2.313 +.015/-.025 .122 .232 .078 +/-.003 2.360 +/-.006 .070 .086 +.005/-.000
SH0255PKRM 5 2.559 65mm 2.377 +.020/-.030 .122 .232 .078 +/-.003 2.360 +/-.006 .070 .086 +.005/-.000
SH0262PKRM 5 2.625 2-5/8 2.428 +.020/-.030 .127 .242 .078 +/-.003 2.481 +/-.006 .072 .086 +.005/-.000
SH0268PKRM 3 2.688 2-11/16 2.485 +.020/-.030 .129 .246 .078 +/-.003 2.541 +/-.006 .073 .086 +.005/-.000
SH0275PKRM 3 2.750 2-3/4 2.543 +.020/-.030 .131 .248 .093 +/-.003 2.602 +/-.006 .074 .103 +.005/-.000
SH0287PKRM 3 2.875 2-7/8 2.659 +.020/-.030 .133 .256 .093 +/-.003 2.721 +/-.006 .077 .103 +.005/-.000
SH0293PKRM 3 2.938 2-15/16 2.717 +.020/-.030 .136 .260 .093 +/-.003 2.779 +/-.006 .079 .103 +.005/-.000
SH0300PKRM 3 3.000 3 2.775 +.020/-.030 .138 .264 .093 +/-.003 2.838 +/-.006 .079 .103 +.005/-.000