Circlips and Retaining Rings Index
Standard External Circlips: American Specification N1400
The most common form of axially fitted circlips for shafts with grooves.
Constructed as curved beams of uniform strength, the radial width is reduced towards the free ends so that a constantly round shape is maintained throughout continuous use. This form of circlip often used in assemblies subjected to strong centrifugal forces, is also secure against high rotational speeds. Lugs with holes are provided for rapid fitting or removal with circlip pliers.
Standard material: Carbon Spring Steel - Standard Finish: Phosphate and Oil.
(Standard circlips are also available in Stainless Steel)
Minimum order charge for UK customers: Orders are subject to a minimum charge of £15 plus carriage, packing & VAT. Minimum order per item £2.50.
Minimum order charge for Overseas customers: Orders are subject to a minimum order charge of £50 Pound Sterling ($100 US Dollars) on an ex-works basis.
Use your keyboard keys Ctrl + F to find your part number in this page.
| * Sizes 12-23 Beryllium Copper only. Please prefix all code numbers with N1400/ | Measurements in inches & lb.f | ||||||||||||||||
| Key to table headings and abbreviations | |||||||||||||||||
| Shaft | Circlip Dimensions | Groove Dimensions | Code No. N1400/ |
||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| frac | dec | t | Tol | D | Tol | Cs | b | L | h | Fr lb.f |
G | Tol | W | Tol | n | Fr lb.f |
|
| 1/8 | .125 | .010 | +.001 -.001 |
.112 | +.002 -.004 |
0.22 | .018 | .048 | .024 | 110 | .117 | +.0015 -.0015 |
.012 | +.002 -.000 |
.014 | 28 | *0012 |
| 5/32 | .156 | .010 | .142 | 0.27 | .026 | .056 | .024 | 130 | .146 | .012 | .017 | 44 | *0015 | ||||
| 3/16 | .188 | .015 | +.002 -.002 |
.168 | 0.30 | .025 | .052 | .023 | 240 | .175 | .018 | .022 | 69 | *0018 | |||
| 7/32 | .219 | .015 | .196 | 0.34 | .028 | .058 | .024 | 280 | .205 | .018 | .023 | 87 | *0021 | ||||
| 15/64 | .236 | .015 | .215 | 0.36 | .030 | .058 | .024 | 310 | .222 | .018 | .023 | 93 | *0023 | ||||
| 1/4 | .250 | .025 | .225 | 0.45 | .035 | .083 | .039 | 880 | .230 | .029 | +.003 -.000 |
.032 | 141 | 0025 | |||
| 9/32 | .281 | .025 | .256 | +.002 -.005 |
0.49 | .038 | .083 | .039 | 990 | .261 | +.002 -.002 |
.029 | .035 | 160 | 0028 | ||
| 5/16 | .312 | .025 | .281 | 0.54 | .040 | .090 | .039 | 1100 | .290 | .029 | .036 | 194 | 0031 | ||||
| 11/32 | .344 | .025 | .309 | 0.57 | .042 | .090 | .039 | 1210 | .321 | .029 | .038 | 224 | 0034 | ||||
| 3/8 | .375 | .025 | .338 | 0.61 | .050 | .091 | .039 | 1320 | .352 | .029 | .038 | 244 | 0037 | ||||
| 13/32 | .406 | .025 | .366 | 0.63 | .054 | .090 | .039 | 4130 | .382 | .029 | .039 | 275 | 0040 | ||||
| 7/16 | .438 | .025 | .395 | 0.66 | .055 | .091 | .039 | 1550 | .412 | .029 | .042 | 322 | 0043 | ||||
| 15/32 | .469 | .025 | .428 | 0.68 | .060 | .091 | .039 | 1660 | .443 | .029 | .042 | 345 | 0046 | ||||
| 1/2 | .500 | .035 | .461 | 0.77 | .065 | .111 | .045 | 2470 | .468 | .039 | .051 | 452 | 0050 | ||||
| 9/16 | .562 | .035 | .521 | +.005 -.010 |
0.82 | .072 | .111 | .045 | 2780 | .530 | .039 | .051 | 508 | 0056 | |||
| 19/32 | .594 | .035 | .550 | 0.86 | .076 | .112 | .045 | 2940 | .559 | +.003 -.003 |
.039 | .057 | 588 | 0059 | |||
| 5/8 | .625 | .035 | .579 | 0.90 | .080 | .113 | .045 | 3090 | .588 | .039 | .060 | 654 | 0062 | ||||
| 43/64 | .672 | .035 | .621 | 0.93 | .082 | .113 | .045 | 3320 | .631 | .039 | .066 | 780 | 0066 | ||||
| 11/16 | .688 | .042 | .635 | 1.01 | .084 | .140 | .050 | 4080 | .646 | .046 | .068 | 817 | 0068 | ||||
| 3/4 | .750 | .042 | .693 | 1.09 | .092 | .140 | .050 | 4450 | .704 | .046 | .074 | 975 | 0075 | ||||
| 25/32 | .781 | .042 | .722 | 1.12 | .094 | .140 | .050 | 4600 | .733 | .046 | .076 | 1060 | 0078 | ||||
| 13/16 | .812 | .042 | .751 | 1.15 | .096 | .140 | .050 | 4800 | .762 | .046 | .080 | 1150 | 0081 | ||||
| 7/8 | .875 | .042 | .810 | 1.21 | .104 | .141 | .050 | 5200 | .821 | .046 | .085 | 1340 | 0087 | ||||
| 15/16 | .938 | .042 | .867 | 1.34 | .110 | .170 | .076 | 5600 | .882 | .046 | .088 | 1480 | 0093 | ||||
| 63/64 | .984 | .042 | .910 | 1.39 | .114 | .171 | .076 | 5800 | .984 | .046 | .091 | 1610 | 0098 | ||||
| 1 | 1.000 | .042 | .925 | 1.41 | .116 | .171 | .076 | 5900 | .940 | .046 | .094 | 1700 | 0100 | ||||
| 1 1/16 | 1.062 | .050 | .982 | +.010 -.015 |
1.50 | .122 | .185 | .076 | 7500 | .998 | +.004 -.004 |
.056 | +.004 -.000 |
.102 | 1920 | 0106 | |
| 1 1/18 | 1.125 | .050 | 1.041 | 1.55 | .128 | .186 | .076 | 7900 | 1.059 | .056 | .105 | 2100 | 0112 | ||||
| 1 3/16 | 1.188 | .050 | 1.098 | 1.61 | .132 | .186 | .076 | 8400 | 1.118 | .056 | .111 | 2350 | 0118 | ||||
| 1 1/4 | 1.250 | .050 | 1.156 | 1.69 | .140 | .187 | .076 | 8800 | 1.176 | .056 | .117 | 2610 | 0125 | ||||
| 1 5/16 | 1.312 | .050 | 1.214 | 1.75 | .146 | .187 | .076 | 9300 | 1.232 | .056 | .126 | 2970 | 0131 | ||||
| 1 3/8 | 1.375 | .050 | 1.272 | 1.80 | .152 | .188 | .076 | 9700 | 1.292 | .056 | .132 | 3270 | 0137 | ||||
| 1 7/16 | 1.438 | .050 | 1.333 | 1.87 | .160 | .188 | .076 | 10200 | 1.350 | .056 | .138 | 3580 | 0143 | ||||
| 1 1/2 | 1.500 | .050 | 1.387 | 1.99 | .168 | .218 | .118 | 10600 | 1.406 | .056 | .147 | 3990 | 0150 | ||||
| 1 9/16 | 1.562 | .062 | +.003 -.003 |
1.446 | +.013 -.020 |
1.95 | .180 | .189 | .100 | 10700 | 1.468 | +.005 -.005 |
.068 | .148 | 4150 | 0156 | |
| 1 5/8 | 1.625 | .062 | 1.503 | 2.17 | .180 | .189 | .100 | 11100 | 1.529 | .068 | .151 | 4410 | 0162 | ||||
| 1 11/16 | 1.688 | .062 | 1.560 | 2.04 | .197 | .205 | .100 | 11500 | 1.589 | .068 | .156 | 4720 | 0168 | ||||
| 1 3/4 | 1.750 | .062 | 1.618 | 2.11 | .197 | .205 | .100 | 11900 | 1.650 | .068 | .157 | 4950 | 0175 | ||||
| 1 13/16 | 1.812 | .062 | 1.675 | 2.23 | .197 | .205 | .100 | 12400 | 1.708 | .068 | .163 | 5330 | 0181 | ||||
| 1 7/8 | 1.875 | .062 | 1.735 | 2.29 | .197 | .205 | .100 | 12800 | 1.769 | .068 | .166 | 5620 | 0187 | ||||
| 2 | 2.000 | .062 | 1.850 | 2.48 | .224 | .232 | .123 | 13600 | 1.886 | .068 | .178 | 6450 | 0200 | ||||
| 2 1/8 | 2.125 | .078 | 1.964 | +.015 -.025 |
2.61 | .228 | .236 | .123 | 18200 | 2.003 | +.006 -.006 |
.086 | +.005 -.000 |
.192 | 7330 | 0212 | |
| 2 1/4 | 2.250 | .078 | 2.081 | 2.87 | .217 | .225 | .123 | 19300 | 2.120 | .086 | .204 | 8270 | 0225 | ||||
| 2 3/8 | 2.375 | .078 | 2.197 | 2.86 | .228 | .236 | .123 | 20400 | 2.239 | .086 | .213 | 9130 | 0237 | ||||
| 2 1/2 | 2.500 | .078 | 2.313 | 2.98 | .228 | .236 | .123 | 21400 | 2.360 | .086 | .219 | 9900 | 0250 | ||||
| 2 5/8 | 2.625 | .078 | 2.428 | +.020 -.030 |
3.11 | .228 | .236 | .123 | 22500 | 2.481 | .086 | .225 | 10700 | 0262 | |||
| 2 3/4 | 2.750 | .093 | 2.543 | 3.33 | .276 | .284 | .123 | 28100 | 2.602 | .103 | .231 | 11500 | 0275 | ||||
| 2 7/8 | 2.875 | .093 | 2.659 | 3.42 | .260 | .268 | .123 | 29400 | 2.721 | .103 | .240 | 12500 | 0287 | ||||
| 3 | 3.000 | .093 | 2.775 | 3.55 | .260 | .268 | .123 | 30700 | 2.838 | .103 | .252 | 13700 | 0300 | ||||
| 3 1/8 | 3.125 | .093 | 2.892 | 3.75 | .272 | .305 | .123 | 32000 | 2.957 | .103 | .261 | 14800 | 0312 | ||||
| 3 1/4 | 3.250 | .093 | 3.006 | 3.83 | .276 | .284 | .123 | 33200 | 3.076 | .103 | .270 | 16000 | 0325 | ||||
| 3 1/2 | 3.500 | .109 | 3.237 | 4.15 | .285 | .320 | .123 | 42000 | 3.316 | .120 | .285 | 18200 | 0350 | ||||
| 3 5/8 | 3.625 | .109 | 3.352 | 4.28 | .315 | .323 | .123 | 43400 | 3.435 | .120 | .294 | 19500 | 0362 | ||||
| 3 3/4 | 3.750 | .109 | 3.468 | 4.44 | .337 | .337 | .123 | 44900 | 3.552 | .120 | .306 | 21000 | 0375 | ||||
| 3 7/8 | 3.875 | .109 | 3.584 | 4.56 | .335 | .335 | .123 | 46400 | 3.673 | .120 | .312 | 22100 | 0387 | ||||
| 4 | 4.000 | .109 | 3.700 | 4.72 | .352 | .352 | .123 | 47900 | 3.792 | .120 | .321 | 23500 | 0400 | ||||
|
* Sizes 12-23 Beryllium Copper only. Please prefix all code numbers with N1400/ |
Measurements in inches & lb.f | ||||||||||||||||
| Key to table headings and abbreviations | |||||||||||||||||
| Shaft | Circlip Dimensions | Groove Dimensions | Code No. N1400/ |
||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| frac | dec | t | Tol | D | Tol | Cs | b | L | h | Fr lb.f |
G | Tol | W | Tol | n | Fr lb.f |
|
| 1/8 | .125 | .010 | +.001 -.001 |
.112 | +.002 -.004 |
0.22 | .018 | .048 | .024 | 110 | .117 | +.0015 -.0015 |
.012 | +.002 -.000 |
.014 | 28 | *0012 |
| 5/32 | .156 | .010 | .142 | 0.27 | .026 | .056 | .024 | 130 | .146 | .012 | .017 | 44 | *0015 | ||||
| 3/16 | .188 | .015 | +.002 -.002 |
.168 | 0.30 | .025 | .052 | .023 | 240 | .175 | .018 | .022 | 69 | *0018 | |||
| 7/32 | .219 | .015 | .196 | 0.34 | .028 | .058 | .024 | 280 | .205 | .018 | .023 | 87 | *0021 | ||||
| 15/64 | .236 | .015 | .215 | 0.36 | .030 | .058 | .024 | 310 | .222 | .018 | .023 | 93 | *0023 | ||||
| 1/4 | .250 | .025 | .225 | 0.45 | .035 | .083 | .039 | 880 | .230 | .029 | +.003 -.000 |
.032 | 141 | 0025 | |||
| 9/32 | .281 | .025 | .256 | +.002 -.005 |
0.49 | .038 | .083 | .039 | 990 | .261 | +.002 -.002 |
.029 | .035 | 160 | 0028 | ||
| 5/16 | .312 | .025 | .281 | 0.54 | .040 | .090 | .039 | 1100 | .290 | .029 | .036 | 194 | 0031 | ||||
| 11/32 | .344 | .025 | .309 | 0.57 | .042 | .090 | .039 | 1210 | .321 | .029 | .038 | 224 | 0034 | ||||
| 3/8 | .375 | .025 | .338 | 0.61 | .050 | .091 | .039 | 1320 | .352 | .029 | .038 | 244 | 0037 | ||||
| 13/32 | .406 | .025 | .366 | 0.63 | .054 | .090 | .039 | 4130 | .382 | .029 | .039 | 275 | 0040 | ||||
| 7/16 | .438 | .025 | .395 | 0.66 | .055 | .091 | .039 | 1550 | .412 | .029 | .042 | 322 | 0043 | ||||
| 15/32 | .469 | .025 | .428 | 0.68 | .060 | .091 | .039 | 1660 | .443 | .029 | .042 | 345 | 0046 | ||||
| 1/2 | .500 | .035 | .461 | 0.77 | .065 | .111 | .045 | 2470 | .468 | .039 | .051 | 452 | 0050 | ||||
| 9/16 | .562 | .035 | .521 | +.005 -.010 |
0.82 | .072 | .111 | .045 | 2780 | .530 | .039 | .051 | 508 | 0056 | |||
| 19/32 | .594 | .035 | .550 | 0.86 | .076 | .112 | .045 | 2940 | .559 | +.003 -.003 |
.039 | .057 | 588 | 0059 | |||
| 5/8 | .625 | .035 | .579 | 0.90 | .080 | .113 | .045 | 3090 | .588 | .039 | .060 | 654 | 0062 | ||||
| 43/64 | .672 | .035 | .621 | 0.93 | .082 | .113 | .045 | 3320 | .631 | .039 | .066 | 780 | 0066 | ||||
| 11/16 | .688 | .042 | .635 | 1.01 | .084 | .140 | .050 | 4080 | .646 | .046 | .068 | 817 | 0068 | ||||
| 3/4 | .750 | .042 | .693 | 1.09 | .092 | .140 | .050 | 4450 | .704 | .046 | .074 | 975 | 0075 | ||||
| 25/32 | .781 | .042 | .722 | 1.12 | .094 | .140 | .050 | 4600 | .733 | .046 | .076 | 1060 | 0078 | ||||
| 13/16 | .812 | .042 | .751 | 1.15 | .096 | .140 | .050 | 4800 | .762 | .046 | .080 | 1150 | 0081 | ||||
| 7/8 | .875 | .042 | .810 | 1.21 | .104 | .141 | .050 | 5200 | .821 | .046 | .085 | 1340 | 0087 | ||||
| 15/16 | .938 | .042 | .867 | 1.34 | .110 | .170 | .076 | 5600 | .882 | .046 | .088 | 1480 | 0093 | ||||
| 63/64 | .984 | .042 | .910 | 1.39 | .114 | .171 | .076 | 5800 | .984 | .046 | .091 | 1610 | 0098 | ||||
| 1 | 1.000 | .042 | .925 | 1.41 | .116 | .171 | .076 | 5900 | .940 | .046 | .094 | 1700 | 0100 | ||||
| 1 1/16 | 1.062 | .050 | .982 | +.010 -.015 |
1.50 | .122 | .185 | .076 | 7500 | .998 | +.004 -.004 |
.056 | +.004 -.000 |
.102 | 1920 | 0106 | |
| 1 1/18 | 1.125 | .050 | 1.041 | 1.55 | .128 | .186 | .076 | 7900 | 1.059 | .056 | .105 | 2100 | 0112 | ||||
| 1 3/16 | 1.188 | .050 | 1.098 | 1.61 | .132 | .186 | .076 | 8400 | 1.118 | .056 | .111 | 2350 | 0118 | ||||
| 1 1/4 | 1.250 | .050 | 1.156 | 1.69 | .140 | .187 | .076 | 8800 | 1.176 | .056 | .117 | 2610 | 0125 | ||||
| 1 5/16 | 1.312 | .050 | 1.214 | 1.75 | .146 | .187 | .076 | 9300 | 1.232 | .056 | .126 | 2970 | 0131 | ||||
| 1 3/8 | 1.375 | .050 | 1.272 | 1.80 | .152 | .188 | .076 | 9700 | 1.292 | .056 | .132 | 3270 | 0137 | ||||
| 1 7/16 | 1.438 | .050 | 1.333 | 1.87 | .160 | .188 | .076 | 10200 | 1.350 | .056 | .138 | 3580 | 0143 | ||||
| 1 1/2 | 1.500 | .050 | 1.387 | 1.99 | .168 | .218 | .118 | 10600 | 1.406 | .056 | .147 | 3990 | 0150 | ||||
| 1 9/16 | 1.562 | .062 | +.003 -.003 |
1.446 | +.013 -.020 |
1.95 | .180 | .189 | .100 | 10700 | 1.468 | +.005 -.005 |
.068 | .148 | 4150 | 0156 | |
| 1 5/8 | 1.625 | .062 | 1.503 | 2.17 | .180 | .189 | .100 | 11100 | 1.529 | .068 | .151 | 4410 | 0162 | ||||
| 1 11/16 | 1.688 | .062 | 1.560 | 2.04 | .197 | .205 | .100 | 11500 | 1.589 | .068 | .156 | 4720 | 0168 | ||||
| 1 3/4 | 1.750 | .062 | 1.618 | 2.11 | .197 | .205 | .100 | 11900 | 1.650 | .068 | .157 | 4950 | 0175 | ||||
| 1 13/16 | 1.812 | .062 | 1.675 | 2.23 | .197 | .205 | .100 | 12400 | 1.708 | .068 | .163 | 5330 | 0181 | ||||
| 1 7/8 | 1.875 | .062 | 1.735 | 2.29 | .197 | .205 | .100 | 12800 | 1.769 | .068 | .166 | 5620 | 0187 | ||||
| 2 | 2.000 | .062 | 1.850 | 2.48 | .224 | .232 | .123 | 13600 | 1.886 | .068 | .178 | 6450 | 0200 | ||||
| 2 1/8 | 2.125 | .078 | 1.964 | +.015 -.025 |
2.61 | .228 | .236 | .123 | 18200 | 2.003 | +.006 -.006 |
.086 | +.005 -.000 |
.192 | 7330 | 0212 | |
| 2 1/4 | 2.250 | .078 | 2.081 | 2.87 | .217 | .225 | .123 | 19300 | 2.120 | .086 | .204 | 8270 | 0225 | ||||
| 2 3/8 | 2.375 | .078 | 2.197 | 2.86 | .228 | .236 | .123 | 20400 | 2.239 | .086 | .213 | 9130 | 0237 | ||||
| 2 1/2 | 2.500 | .078 | 2.313 | 2.98 | .228 | .236 | .123 | 21400 | 2.360 | .086 | .219 | 9900 | 0250 | ||||
| 2 5/8 | 2.625 | .078 | 2.428 | +.020 -.030 |
3.11 | .228 | .236 | .123 | 22500 | 2.481 | .086 | .225 | 10700 | 0262 | |||
| 2 3/4 | 2.750 | .093 | 2.543 | 3.33 | .276 | .284 | .123 | 28100 | 2.602 | .103 | .231 | 11500 | 0275 | ||||
| 2 7/8 | 2.875 | .093 | 2.659 | 3.42 | .260 | .268 | .123 | 29400 | 2.721 | .103 | .240 | 12500 | 0287 | ||||
| 3 | 3.000 | .093 | 2.775 | 3.55 | .260 | .268 | .123 | 30700 | 2.838 | .103 | .252 | 13700 | 0300 | ||||
| 3 1/8 | 3.125 | .093 | 2.892 | 3.75 | .272 | .305 | .123 | 32000 | 2.957 | .103 | .261 | 14800 | 0312 | ||||
| 3 1/4 | 3.250 | .093 | 3.006 | 3.83 | .276 | .284 | .123 | 33200 | 3.076 | .103 | .270 | 16000 | 0325 | ||||
| 3 1/2 | 3.500 | .109 | 3.237 | 4.15 | .285 | .320 | .123 | 42000 | 3.316 | .120 | .285 | 18200 | 0350 | ||||
| 3 5/8 | 3.625 | .109 | 3.352 | 4.28 | .315 | .323 | .123 | 43400 | 3.435 | .120 | .294 | 19500 | 0362 | ||||
| 3 3/4 | 3.750 | .109 | 3.468 | 4.44 | .337 | .337 | .123 | 44900 | 3.552 | .120 | .306 | 21000 | 0375 | ||||
| 3 7/8 | 3.875 | .109 | 3.584 | 4.56 | .335 | .335 | .123 | 46400 | 3.673 | .120 | .312 | 22100 | 0387 | ||||
| 4 | 4.000 | .109 | 3.700 | 4.72 | .352 | .352 | .123 | 47900 | 3.792 | .120 | .321 | 23500 | 0400 | ||||
Circlips and Retaining Rings Index | Contact Springmasters with your specifications.
