Precision Associates, Inc.
Precision Associates, Inc.
3800 North Washington Ave.
Minneapolis, MN 55412-2142
Toll Free: 1-800-394-6590
Local: +1 612-333-7464
Sales: +1 612-334-9190
Fax: 612-342-2417
Email: [email protected]
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Search our list of Metric O-Rings. O-Rings included on this list are either included in an International Standard, or measure in even mm increments. If you can't find your O-Ring seal in this group, be sure to check out "All O-Rings".
O-Ring Picture
Unit of Measure
1 2 3 4 

Item #

C/S Metric (mm)

ID Metric (mm)

OD Metric (mm)

Std Shrink

Special Shrink

Reference Size

157-512VS N/A 4.00 N/A 13.1 N/A 12.1 N/A Yes N/A N/A
156-837ES N/A 4.00 N/A 21.40 N/A 29.40 N/A Yes N/A N/A
156-938SS N/A 4.00 N/A 24.20 N/A 32.20 N/A Yes N/A N/A
157-1.102 N/A 4.00 N/A 28.00 N/A 36.00 N/A Yes N/A N/A
157-1.181 N/A 4.00 N/A 30.0 N/A 38.00 N/A N/A Yes N/A
157-1.220 N/A 4.00 N/A 31.00 N/A 39.00 N/A Yes N/A N/A
157-1.259NS N/A 4.00 N/A 32.00 N/A 40.00 N/A N/A Yes N/A
157-1.388SS N/A 4.00 N/A 35.25 N/A 43.25 N/A N/A Yes N/A
157-1.575 N/A 4.00 N/A 40 N/A 48.00 N/A Yes N/A N/A
157-1.968 N/A 4.00 N/A 50.0 N/A 58.00 N/A Yes N/A N/A
158-2.126ES N/A 4.00 N/A 54.00 N/A 62.00 N/A N/A Yes N/A
157-2.835VS N/A 4.00 N/A 72.00 N/A 80.00 N/A N/A Yes N/A
157-2.835VS N/A 4.00 N/A 72.60 N/A 80.60 N/A Yes N/A N/A
158-3.071ES N/A 4.00 N/A 78.00 N/A 86.00 N/A N/A Yes N/A
158-3.780ES N/A 4.00 N/A 96.00 N/A 104.00 N/A N/A Yes N/A
157-4.606ES N/A 4.00 N/A 117.00 N/A 125.00 N/A N/A Yes N/A
157-5.512VS N/A 4.00 N/A 140.00 N/A 148.00 N/A N/A Yes N/A
157-6.299 N/A 4.00 N/A 160.00 N/A 168.00 N/A Yes N/A N/A
157-6.830 N/A 4.00 N/A 173.50 N/A 181.50 N/A Yes N/A N/A
157-10.827 N/A 4.00 N/A 275.00 N/A 283.00 N/A Yes N/A N/A
162-5.500 N/A 4.10 N/A 139.70 N/A 147.90 N/A Yes N/A N/A
165-456 N/A 4.20 N/A 11.60 N/A 20.00 N/A Yes N/A N/A
166-612 N/A 4.20 N/A 15.50 N/A 23.90 N/A Yes N/A N/A
169-465 N/A 4.30 N/A 11.80 N/A 20.40 N/A Yes N/A N/A
170-3.253 N/A 4.30 N/A 82.60 N/A 91.20 N/A Yes N/A N/A
173-1.225 N/A 4.40 N/A 31.10 N/A 39.90 N/A Yes N/A N/A
178-165 N/A 4.50 N/A 4.20 N/A 13.20 N/A Yes N/A N/A
178-767 N/A 4.50 N/A 19.50 N/A 28.50 N/A Yes N/A N/A
176-1.944SS N/A 4.50 N/A 50.0 N/A 59.00 N/A Yes N/A N/A
176-2.145VS N/A 4.50 N/A 55.10 N/A 64.10 N/A Yes N/A N/A
176-2.600SS N/A 4.50 N/A 66.60 N/A 75.60 N/A Yes N/A N/A
177-2.925 N/A 4.50 N/A 74.30 N/A 83.30 N/A Yes N/A N/A
181-4.488 N/A 4.60 N/A 114.00 N/A 123.20 N/A Yes N/A N/A
185-3.260 N/A 4.70 N/A 82.80 N/A 92.20 N/A Yes N/A N/A
186-4.095SS N/A 4.70 N/A 104.30 N/A 113.70 N/A Yes N/A N/A
187-8.553 N/A 4.70 N/A 216.50 N/A 225.90 N/A Yes N/A N/A
189-5.650 N/A 4.80 N/A 143.00 N/A 152.60 N/A Yes N/A N/A
187-9.126SS N/A 4.80 N/A 234.30 N/A 243.90 N/A Yes N/A N/A
190-870SS N/A 4.90 N/A 22.50 N/A 32.30 N/A Yes N/A N/A
193-1.158 N/A 4.90 N/A 29.40 N/A 39.20 N/A Yes N/A N/A
197-276 N/A 5.00 N/A 7.00 N/A 17.0 N/A Yes N/A N/A
197-866 N/A 5.00 N/A 22.00 N/A 32.00 N/A Yes N/A N/A
197-984VS N/A 5.00 N/A 25 N/A 35.00 N/A N/A Yes N/A
197-2.921 N/A 5.00 N/A 74.20 N/A 84.20 N/A Yes N/A N/A
197-4.921 N/A 5.00 N/A 125.00 N/A 135.00 N/A Yes N/A N/A
197-5.197 N/A 5.00 N/A 132.00 N/A 142.00 N/A Yes N/A N/A
197-5.708VS N/A 5.00 N/A 145.00 N/A 155.00 N/A N/A Yes N/A
197-14.764 N/A 5.00 N/A 375.00 N/A 385.00 N/A Yes N/A N/A
197-17.520VS N/A 5.00 N/A 445.00 N/A 455.00 N/A N/A Yes N/A
197-20.669VS N/A 5.00 N/A 525.00 N/A 535.00 N/A N/A Yes N/A
209-2.587 N/A 5.30 N/A 65.70 N/A 76.30 N/A Yes N/A N/A
212-1.237 N/A 5.40 N/A 31.40 N/A 42.20 N/A Yes N/A N/A
212-3.641 N/A 5.40 N/A 92.50 N/A 103.30 N/A Yes N/A N/A
212-4.645 N/A 5.40 N/A 118.00 N/A 128.80 N/A Yes N/A N/A
215-1.890VS N/A 5.50 N/A 48.40 N/A 59.40 N/A Yes N/A N/A
215-2.231ES N/A 5.50 N/A 56.90 N/A 67.90 N/A Yes N/A N/A
217-2.362 N/A 5.50 N/A 60.00 N/A 71.00 N/A Yes N/A N/A
223-813SS N/A 5.70 N/A 20.70 N/A 32.10 N/A Yes N/A N/A
224-1.941VS N/A 5.70 N/A 49.30 N/A 60.70 N/A N/A Yes N/A BS 4518 0493-57
224-2.052 N/A 5.70 N/A 52.10 N/A 63.50 N/A Yes N/A N/A
224-2.362 N/A 5.70 N/A 60.00 N/A 71.40 N/A Yes N/A N/A
224-2.925 N/A 5.70 N/A 74.30 N/A 85.70 N/A N/A Yes N/A BS 4518 0743-57
224-4.098 N/A 5.70 N/A 104.10 N/A 115.50 N/A Yes N/A N/A
224-6.075 N/A 5.70 N/A 154.30 N/A 165.70 N/A Yes N/A N/A JIS B2401 - G155
224-6.783 N/A 5.70 N/A 172.30 N/A 183.70 N/A Yes N/A N/A
224-8.240 N/A 5.70 N/A 209.30 N/A 220.70 N/A Yes N/A N/A JIS B2401 - G210, BS 4518 2093-57
224-14.146 N/A 5.70 N/A 359.30 N/A 370.70 N/A Yes N/A N/A BS 4518 3593-57
237-1.848 N/A 6.00 N/A 47.00 N/A 59.00 N/A Yes N/A N/A
236-8.225VS N/A 6.00 N/A 209.00 N/A 221.00 N/A N/A Yes N/A
241-4.850 N/A 6.10 N/A 123.20 N/A 135.40 N/A Yes N/A N/A
241-5.725 N/A 6.10 N/A 145.40 N/A 157.60 N/A Yes N/A N/A
241-6.225 N/A 6.10 N/A 158.10 N/A 170.30 N/A Yes N/A N/A
241-6.975 N/A 6.10 N/A 177.20 N/A 189.40 N/A Yes N/A N/A
241-7.225 N/A 6.10 N/A 183.50 N/A 195.70 N/A Yes N/A N/A
241-7.475 N/A 6.10 N/A 189.90 N/A 202.10 N/A Yes N/A N/A
241-7.725 N/A 6.10 N/A 196.20 N/A 208.40 N/A Yes N/A N/A
241-7.975 N/A 6.10 N/A 202.60 N/A 214.80 N/A Yes N/A N/A
241-9.975VS N/A 6.20 N/A 257.00 N/A 269.40 N/A Yes N/A N/A
248-3.575 N/A 6.30 N/A 90.80 N/A 103.40 N/A Yes N/A N/A
250-25.375VS N/A 6.40 N/A 650.60 N/A 663.40 N/A Yes N/A N/A
256-6.181 N/A 6.50 N/A 156.80 N/A 169.80 N/A Yes N/A N/A
260-2.476 N/A 6.60 N/A 62.80 N/A 76.00 N/A Yes N/A N/A
256-3.563SS N/A 6.60 N/A 91.80 N/A 105.00 N/A Yes N/A N/A
264-1.406 N/A 6.70 N/A 35.70 N/A 49.10 N/A Yes N/A N/A
268-2.763 N/A 6.80 N/A 70.30 N/A 83.90 N/A Yes N/A N/A
272-7.051 N/A 6.90 N/A 179.10 N/A 192.90 N/A Yes N/A N/A
272-9.413 N/A 6.90 N/A 239.10 N/A 252.90 N/A Yes N/A N/A
272-10.988 N/A 6.90 N/A 279.10 N/A 292.90 N/A Yes N/A N/A
275-945 N/A 7.0 N/A 24 N/A 38.00 N/A Yes N/A N/A
275-1.100VS N/A 7.0 N/A 28.30 N/A 42.30 N/A Yes N/A N/A
275-1.225 N/A 7.0 N/A 31.10 N/A 45.10 N/A Yes N/A N/A
1-400 N/A 7.0 N/A 34.30 N/A 48.30 N/A Yes N/A N/A
1-401 N/A 7.0 N/A 37.50 N/A 51.50 N/A Yes N/A N/A
275-1.745VS N/A 7.0 N/A 44.50 N/A 58.50 N/A Yes N/A N/A
1-404 N/A 7.0 N/A 47.00 N/A 61.00 N/A Yes N/A N/A
1-407 N/A 7.0 N/A 56.50 N/A 70.50 N/A Yes N/A N/A
1-408 N/A 7.0 N/A 59.70 N/A 73.70 N/A Yes N/A N/A
1-410 N/A 7.0 N/A 66.00 N/A 80.00 N/A Yes N/A N/A
1-411 N/A 7.0 N/A 69.20 N/A 83.20 N/A Yes N/A N/A
1-412 N/A 7.0 N/A 72.40 N/A 86.40 N/A Yes N/A N/A
1-415 N/A 7.0 N/A 81.90 N/A 95.90 N/A Yes N/A N/A
1-416 N/A 7.0 N/A 85.10 N/A 99.10 N/A Yes N/A N/A
1-419 N/A 7.0 N/A 94.60 N/A 108.60 N/A Yes N/A N/A
1-420 N/A 7.0 N/A 97.80 N/A 111.80 N/A Yes N/A N/A
1-421 N/A 7.0 N/A 101.00 N/A 115.00 N/A Yes N/A N/A
1-424 N/A 7.0 N/A 110.50 N/A 124.50 N/A Yes N/A N/A
275-29.331ES N/A 7.0 N/A 749.80 N/A 763.80 N/A Yes N/A N/A
275-33.750VS N/A 7.0 N/A 862.0 N/A 876.0 N/A Yes N/A N/A
275-3.252SS N/A 7.10 N/A 83.80 N/A 98.00 N/A Yes N/A N/A
282-1.986VS N/A 7.20 N/A 50.70 N/A 65.10 N/A Yes N/A N/A
282-2.490VS N/A 7.20 N/A 63.50 N/A 77.90 N/A Yes N/A N/A
295-6.835NS N/A 7.50 N/A 173.60 N/A 188.60 N/A N/A Yes N/A
295-6.910SS N/A 7.50 N/A 175.50 N/A 190.50 N/A N/A Yes N/A
300-1.220 N/A 7.60 N/A 31.00 N/A 46.20 N/A Yes N/A N/A
299-1.410 N/A 7.60 N/A 35.80 N/A 51.00 N/A Yes N/A N/A
312-1.594 N/A 7.90 N/A 40.50 N/A 56.30 N/A Yes N/A N/A
312-2.312 N/A 7.90 N/A 58.50 N/A 74.30 N/A Yes N/A N/A
312-2.812 N/A 7.90 N/A 71.20 N/A 87.00 N/A Yes N/A N/A
312-3.938 N/A 7.90 N/A 100.0 N/A 115.8 N/A Yes N/A N/A
312-8.750 N/A 7.90 N/A 222.25 N/A 238.05 N/A Yes N/A N/A
312-16.690 N/A 7.90 N/A 423.90 N/A 439.70 N/A Yes N/A N/A
312-2.875SS N/A 8.00 N/A 73.80 N/A 89.80 N/A Yes N/A N/A
313-4.300ES N/A 8.00 N/A 109.50 N/A 125.50 N/A Yes N/A N/A
315-4.776 N/A 8.00 N/A 121.30 N/A 137.30 N/A Yes N/A N/A
312-6.700VS N/A 8.00 N/A 172.00 N/A 188.00 N/A Yes N/A N/A
323-8.898 N/A 8.20 N/A 226.00 N/A 242.40 N/A Yes N/A N/A
330-8.197 N/A 8.40 N/A 79.70 N/A 96.50 N/A Yes N/A N/A
331-8.197 N/A 8.40 N/A 208.20 N/A 225.00 N/A Yes N/A N/A
335-2.027 N/A 8.50 N/A 51.50 N/A 68.50 N/A Yes N/A N/A
330-5.319SS N/A 8.50 N/A 137.00 N/A 154.00 N/A Yes N/A N/A
330-5.354SS N/A 8.50 N/A 138.00 N/A 155.00 N/A Yes N/A N/A
339-11.654 N/A 8.60 N/A 295.60 N/A 312.80 N/A Yes N/A N/A
338-15.410 N/A 8.60 N/A 391.40 N/A 408.60 N/A Yes N/A N/A
341-25.984 N/A 8.60 N/A 656.50 N/A 673.70 N/A Yes N/A N/A
346-20.125 N/A 8.80 N/A 511.20 N/A 528.80 N/A Yes N/A N/A
370-2.982 N/A 9.40 N/A 75.75 N/A 94.55 N/A Yes N/A N/A
370-12.106 N/A 9.40 N/A 307.50 N/A 326.30 N/A Yes N/A N/A
374-1.102VS N/A 9.50 N/A 28.00 N/A 47.00 N/A N/A Yes N/A
375-2.875 N/A 9.50 N/A 73.00 N/A 92.00 N/A Yes N/A N/A
375-4.250 N/A 9.50 N/A 107.80 N/A 126.80 N/A Yes N/A N/A
374-9.646ES N/A 9.50 N/A 245.00 N/A 264.00 N/A N/A Yes N/A
394-2.362SS N/A 10.00 N/A 60.00 N/A 80.00 N/A N/A Yes N/A
Unit of Measure
1 2 3 4