O Rings

Below is our standard range of O Rings.

An O-Ring is a doughnut or torus shaped seal typically used to keep fluid or air in or out of a defined space. All of our O-Rings are manufactured in Nitrile rubber and are black as standard.

  • Same day despatch on stock items.
  • 5 - 7 working days average lead time for made to order standard parts.
  • Minimum order value of £30 (plus carriage and VAT - subject to stock)
  • Some parts may be subject to minimum order quantities should they not be in stock.

Prices and Availability

Contact our sales team now for prices and availability, by email to sales@grommets.co.uk or call +44 (0)1273 494 400.
Alternatively please use our contact form or online chat facility.

Measuring Guide

Need help measuring for the right sized part?

Please use the guide to help you measure dimensions of the O Rings you require. Then select a product code from the list that may be suitable for your measurements.

Measuring Guide Contact Us

Measuring Guide

Measuring Guide for O Rings

Please use the diagram above to help you measure the a, b, c dimensions of the O Rings you require. Using these measurements as a guide you can then select a product code from the list that may be suitable for your requirements.

All of our part numbers are made up of the three a, b, c dimensions of the part itself.

Measuring Guide (854KB)

Need Help?

O Rings Product List/Sizes

Our O Rings are listed in order of their overall diameter size, starting with the smallest. Use your ‘a’ dimension to find a suitable part in our list. All our part numbers are made up of the three a, b, c dimensions of the part itself.

Cross Section
1.0 to 2mm

Cross Section
2.01 to 3mm

Cross Section
3.01 to 5mm

Cross Section
5.01mm +

Measuring Guide for O Rings
Part Numbera (mm)b (mm)c (mm)
G17-BS0021.271.073.61
G17-BS0041.781.785.34
G17-BS0061.782.906.46
G17-BS0081.784.478.03
G17-BS0101.786.079.63
G17-BS8031.786.359.91
G17-BS0111.787.6511.22
G17-BS0141.7812.4215.98
G17-BS0161.7815.6019.16
G17-BS0181.7818.2722.33
G17-BS0191.7820.3523.91
G17-BS0221.7825.1228.68
Part Numbera (mm)b (mm)c (mm)
G17-24-02162.4021.6024.74
G17-24-03462.4034.0037.65
G17-BS1122.6212.3717.61
G17-BS1132.6213.9519.19
G17-BS1142.6215.5420.78
G17-BS1162.6218.7223.96
G17-BS1172.6220.2925.53
G17-BS1192.6223.4728.71
G17-BS1272.6223.4730.31
G17-BS1202.6225.0728.71
G17-BS1312.6242.5247.76
G17-BS1342.6247.3052.54
G17-BS1352.6248.9054.14
G17-BS1382.6253.6458.88
G17-BS1482.6269.5274.76
G17-BS1522.6282.2287.46
G17-30-2953.0029.5034.59
Part Numbera (mm)b (mm)c (mm)
G17-BS2033.537.5214.58
G17-BS2053.5310.6917.75
G17-BS2103.5318.6425.70
G17-BS2123.5321.8228.88
G17-BS2163.5328.1735.23
G17-BS2193.5332.9339.99
G17-BS2263.5350.4057.46
G17-BS2323.5369.4476.50
G17-BS2503.53126.60133.66
G17-BS2523.53132.94140.00
G17-BS2673.53209.15216.21
G17-BS2723.53240.50247.96
Part Numbera (mm)b (mm)c (mm)
G17-BS3255.3337.4748.13
G17-BS3265.3340.6551.31
G17-BS3515.33120.02120.02
G17-BS3635.33164.47175.13
Measuring Guide for O Rings