View M Barnwell Services Limited on TEKEN44M Barnwell Services are the largest independent manufacturer, stockist and distributor of O Rings and Back-Up Rings in the UK. With 50 million in stock, we supply to over 5000 customers globally every month – quickly and reliably. We have an extensive range of seal materials including Perfluoroelastomer (FFKM), Nitrile (NBR), Hydrogenated Nitrile (HNBR), Kalrez®, Viton™ (or FKM/FPM), Viton™ A, Viton™ B, Viton™ GF, Viton™ GLT, Viton™ GFLT, Viton™ ETP, Ethylene Propylene (EPDM), Silicone (VMQ), Polytetrafluoroethylene (PTFE) Fluorosilicone (FVMQ) and Medical Grade. These can all be measured to imperial (BS1806, ISO 3601) and metric (BS4518) sizes, shore hardness and to a range of International, National and industry specifications, grades and approval standards. We also offer a comprehensive range of quality FEP/PFA Encapsulated Rubber Seals, O Ring Cord and Hot Vulcanised Seals. If you would like more information about our range, download our catalogue, or contact a member of the team.
ISO 3601-1
Fluid power systems O-rings Part 1: Inside diamet...
BS 1806
Specification for dimensions of toroidal sealing rings ('O' seals and their housings)
BS 4518
Specification for metric dimensions of toroidal sealing rings ('O'-rings) and their housings
DIN 3771-4
Fluid systems; O-rings; quality acceptance criteria
DIN 3771-2
Fluid systems; O-rings; test, storage, marking
DIN 3771-1
Fluid systems; O-rings; dimensions of ISO 3601
SMS 1586
O-rings - Dimensions
SS 1588
Sealing elements — O-rings - Housing dimensions for general applications
NFT 47 501
RUBBER O-RINGS - DESIGNATION, DIMENSIONS AND TOLERANCES
SAE AS568
AEROSPACE SIZE STANDARD FOR O-RINGS
SAE J515
Specification for O-Ring Materials Used with Hydraulic Connectors
ISO 8434-3
Metallic tube connections for fluid power and general use — Part 3: O-ring face seal connectors
JIS B 2401-1
O-rings - Part 1: O-rings
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