BS 4518 O-Ring Sizes
		
		
			
	
		
			| BS4518 Size | 
			ID (mm) | 
			ID Tol' (+/- mm) | 
			CS (mm) | 
			CS Tol' (mm) | 
			ID (inch) | 
			ID Tol' (+/- inch) | 
			CS (inch) | 
			CS Tol' (inch) | 
		
	
	
		
			| BS4518 -0031-16 | 
			3.1 | 
			0.15 | 
			1.6 | 
			0.08 | 
			0.122 | 
			0.006 | 
			0.063 | 
			0.003 | 
		
		
			| BS4518 -0041-16 | 
			4.1 | 
			0.161 | 
		
		
			| BS4518 -0051-16 | 
			5.1 | 
			0.201 | 
		
		
			| BS4518 -0061-16 | 
			6.1 | 
			0.240 | 
		
		
			| BS4518 -0071-16 | 
			7.1 | 
			0.280 | 
		
		
			| BS4518 -0081-16 | 
			8.1 | 
			0.319 | 
		
		
			| BS4518 -0091-16 | 
			9.1 | 
			0.358 | 
		
		
			| BS4518 -0101-16 | 
			10.1 | 
			0.2 | 
			0.398 | 
			0.008 | 
		
		
			| BS4518 -0111-16 | 
			11.1 | 
			0.437 | 
		
		
			| BS4518 -0121-16 | 
			12.1 | 
			0.476 | 
		
		
			| BS4518 -0131-16 | 
			13.1 | 
			0.516 | 
		
		
			| BS4518 -0141-16 | 
			14.1 | 
			0.555 | 
		
		
			| BS4518 -0151-16 | 
			15.1 | 
			0.594 | 
		
		
			| BS4518 -0161-16 | 
			16.1 | 
			0.634 | 
		
		
			| BS4518 -0171-16 | 
			17.1 | 
			0.673 | 
		
		
			| BS4518 -0181-16 | 
			18.1 | 
			0.25 | 
			0.713 | 
			0.010 | 
		
		
			| BS4518 -0191-16 | 
			19.1 | 
			0.752 | 
		
		
			| BS4518 -0221-16 | 
			22.1 | 
			0.870 | 
		
		
			| BS4518 -0251-16 | 
			25.1 | 
			0.988 | 
		
		
			| BS4518 -0271-16 | 
			27.1 | 
			1.067 | 
		
		
			| BS4518 -0291-16 | 
			29.1 | 
			1.146 | 
		
		
			| BS4518 -0321-16 | 
			32.1 | 
			0.3 | 
			1.264 | 
			0.012 | 
		
		
			| BS4518 -0351-16 | 
			35.1 | 
			1.382 | 
		
		
			| BS4518 -0371-16 | 
			37.1 | 
			1.461 | 
		
		
			| BS4518 -0036-24 | 
			3.6 | 
			0.15 | 
			2.4 | 
			0.142 | 
			0.006 | 
			0.094 | 
		
		
			| BS4518 -0046-24 | 
			4.6 | 
			0.181 | 
		
		
			| BS4518 -0056-24 | 
			5.6 | 
			0.220 | 
		
		
			| BS4518 -0066-24 | 
			6.6 | 
			0.260 | 
		
		
			| BS4518 -0076-24 | 
			7.6 | 
			0.299 | 
		
		
			| BS4518 -0086-24 | 
			8.6 | 
			0.339 | 
		
		
			| BS4518 -0096-24 | 
			9.6 | 
			0.378 | 
		
		
			| BS4518 -0106-24 | 
			10.6 | 
			0.2 | 
			0.417 | 
			0.008 | 
		
		
			| BS4518 -0116-24 | 
			11.6 | 
			0.457 | 
		
		
			| BS4518 -0126-24 | 
			12.6 | 
			0.496 | 
		
		
			| BS4518 -0136-24 | 
			13.6 | 
			0.535 | 
		
		
			| BS4518 -0146-24 | 
			14.6 | 
			0.575 | 
		
		
			| BS4518 -0156-24 | 
			15.6 | 
			0.614 | 
		
		
			| BS4518 -0166-24 | 
			16.6 | 
			0.654 | 
		
		
			| BS4518 -0176-24 | 
			17.6 | 
			0.693 | 
		
		
			| BS4518 -0186-24 | 
			18.6 | 
			0.25 | 
			0.732 | 
			0.010 | 
		
		
			| BS4518 -0196-24 | 
			19.6 | 
			0.772 | 
		
		
			| BS4518 -0206-24 | 
			20.6 | 
			0.811 | 
		
		
			| BS4518 -0216-24 | 
			21.6 | 
			0.850 | 
		
		
			| BS4518 -0246-24 | 
			24.6 | 
			0.969 | 
		
		
			| BS4518 -0276-24 | 
			27.6 | 
			1.087 | 
		
		
			| BS4518 -0296-24 | 
			29.6 | 
			1.165 | 
		
		
			| BS4518 -0316-24 | 
			31.6 | 
			0.3 | 
			1.244 | 
			0.012 | 
		
		
			| BS4518 -0346-24 | 
			34.6 | 
			1.362 | 
		
		
			| BS4518 -0356-24 | 
			35.6 | 
			1.402 | 
		
		
			| BS4518 -0376-24 | 
			37.6 | 
			1.480 | 
		
		
			| BS4518 -0396-24 | 
			39.6 | 
			1.559 | 
		
		
			| BS4518 -0416-24 | 
			41.6 | 
			1.638 | 
		
		
			| BS4518 -0446-24 | 
			44.6 | 
			1.756 | 
		
		
			| BS4518 -0456-24 | 
			45.6 | 
			1.795 | 
		
		
			| BS4518 -0476-24 | 
			47.6 | 
			1.874 | 
		
		
			| BS4518 -0496-24 | 
			49.6 | 
			1.953 | 
		
		
			| BS4518 -0516-24 | 
			51.6 | 
			0.4 | 
			2.031 | 
			0.016 | 
		
		
			| BS4518 -0546-24 | 
			54.6 | 
			2.150 | 
		
		
			| BS4518 -0556-24 | 
			55.6 | 
			2.189 | 
		
		
			| BS4518 -0576-24 | 
			57.6 | 
			2.268 | 
		
		
			| BS4518 -0586-24 | 
			58.6 | 
			2.307 | 
		
		
			| BS4518 -0596-24 | 
			59.6 | 
			2.346 | 
		
		
			| BS4518 -0616-24 | 
			61.6 | 
			2.425 | 
		
		
			| BS4518 -0626-24 | 
			62.6 | 
			2.465 | 
		
		
			| BS4518 -0646-24 | 
			64.6 | 
			2.543 | 
		
		
			| BS4518 -0676-24 | 
			67.6 | 
			2.661 | 
		
		
			| BS4518 -0696-24 | 
			69.6 | 
			2.740 | 
		
		
			| BS4518 -0195-30 | 
			19.5 | 
			0.25 | 
			3 | 
			0.1 | 
			0.768 | 
			0.010 | 
			0.118 | 
			0.004 | 
		
		
			| BS4518 -0215-30 | 
			21.5 | 
			0.846 | 
		
		
			| BS4518 -0225-30 | 
			22.5 | 
			0.886 | 
		
		
			| BS4518 -0245-30 | 
			24.5 | 
			0.965 | 
		
		
			| BS4518 -0255-30 | 
			25.5 | 
			1.004 | 
		
		
			| BS4518 -0265-30 | 
			26.5 | 
			1.043 | 
		
		
			| BS4518 -0275-30 | 
			27.5 | 
			1.083 | 
		
		
			| BS4518 -0295-30 | 
			29.5 | 
			1.161 | 
		
		
			| BS4518 -0315-30 | 
			31.5 | 
			0.3 | 
			1.240 | 
			0.012 | 
		
		
			| BS4518 -0325-30 | 
			32.5 | 
			1.280 | 
		
		
			| BS4518 -0345-30 | 
			34.5 | 
			1.358 | 
		
		
			| BS4518 -0355-30 | 
			35.5 | 
			1.398 | 
		
		
			| BS4518 -0365-30 | 
			36.5 | 
			1.437 | 
		
		
			| BS4518 -0375-30 | 
			37.5 | 
			1.476 | 
		
		
			| BS4518 -0395-30 | 
			39.5 | 
			1.555 | 
		
		
			| BS4518 -0415-30 | 
			41.5 | 
			1.634 | 
		
		
			| BS4518 -0425-30 | 
			42.5 | 
			1.673 | 
		
		
			| BS4518 -0445-30 | 
			44.5 | 
			1.752 | 
		
		
			| BS4518 -0495-30 | 
			49.5 | 
			1.949 | 
		
		
			| BS4518 -0545-30 | 
			54.5 | 
			0.4 | 
			2.146 | 
			0.016 | 
		
		
			| BS4518 -0555-30 | 
			55.5 | 
			2.185 | 
		
		
			| BS4518 -0575-30 | 
			57.5 | 
			2.264 | 
		
		
			| BS4518 -0595-30 | 
			59.5 | 
			2.343 | 
		
		
			| BS4518 -0625-30 | 
			62.5 | 
			2.461 | 
		
		
			| BS4518 -0645-30 | 
			64.5 | 
			2.539 | 
		
		
			| BS4518 -0695-30 | 
			69.5 | 
			2.736 | 
		
		
			| BS4518 -0745-30 | 
			74.5 | 
			2.933 | 
		
		
			| BS4518 -0795-30 | 
			79.5 | 
			3.130 | 
		
		
			| BS4518 -0845-30 | 
			84.5 | 
			0.5 | 
			3.327 | 
			0.020 | 
		
		
			| BS4518 -0895-30 | 
			89.5 | 
			3.524 | 
		
		
			| BS4518 -0945-30 | 
			94.5 | 
			3.720 | 
		
		
			| BS4518 -0995-30 | 
			99.5 | 
			3.917 | 
		
		
			| BS4518 -1045-30 | 
			104.5 | 
			4.114 | 
		
		
			| BS4518 -1095-30 | 
			109.5 | 
			4.311 | 
		
		
			| BS4518 -1145-30 | 
			114.5 | 
			4.508 | 
		
		
			| BS4518 -1195-30 | 
			119.5 | 
			4.705 | 
		
		
			| BS4518 -1245-30 | 
			124.5 | 
			0.6 | 
			4.902 | 
			0.024 | 
		
		
			| BS4518 -1295-30 | 
			129.5 | 
			5.098 | 
		
		
			| BS4518 -1345-30 | 
			134.5 | 
			5.295 | 
		
		
			| BS4518 -1395-30 | 
			139.5 | 
			5.492 | 
		
		
			| BS4518 -1445-30 | 
			144.5 | 
			5.689 | 
		
		
			| BS4518 -1495-30 | 
			149.5 | 
			5.886 | 
		
		
			| BS4518 -1545-30 | 
			154.5 | 
			6.083 | 
		
		
			| BS4518 -1595-30 | 
			159.5 | 
			6.280 | 
		
		
			| BS4518 -1645-30 | 
			164.5 | 
			6.476 | 
		
		
			| BS4518 -1695-30 | 
			169.5 | 
			6.673 | 
		
		
			| BS4518 -1745-30 | 
			174.5 | 
			6.870 | 
		
		
			| BS4518 -1795-30 | 
			179.5 | 
			7.067 | 
		
		
			| BS4518 -1845-30 | 
			184.5 | 
			0.8 | 
			7.264 | 
			0.031 | 
		
		
			| BS4518 -1895-30 | 
			189.5 | 
			7.461 | 
		
		
			| BS4518 -1945-30 | 
			194.5 | 
			7.657 | 
		
		
			| BS4518 -1995-30 | 
			199.5 | 
			7.854 | 
		
		
			| BS4518 -2095-30 | 
			209.5 | 
			8.248 | 
		
		
			| BS4518 -2195-30 | 
			219.5 | 
			8.642 | 
		
		
			| BS4518 -2295-30 | 
			229.5 | 
			9.035 | 
		
		
			| BS4518 -2395-30 | 
			239.5 | 
			9.429 | 
		
		
			| BS4518 -2445-30 | 
			244.5 | 
			9.626 | 
		
		
			| BS4518 -2495-30 | 
			249.5 | 
			9.823 | 
		
		
			| BS4518 -0443-57 | 
			44.3 | 
			0.3 | 
			5.7 | 
			0.12 | 
			1.744 | 
			0.012 | 
			0.224 | 
			0.005 | 
		
		
			| BS4518 -0453-57 | 
			45.3 | 
			1.783 | 
		
		
			| BS4518 -0493-57 | 
			49.3 | 
			1.941 | 
		
		
			| BS4518 -0523-57 | 
			52.3 | 
			0.4 | 
			2.059 | 
			0.016 | 
		
		
			| BS4518 -0543-57 | 
			54.3 | 
			2.138 | 
		
		
			| BS4518 -0553-57 | 
			55.3 | 
			2.177 | 
		
		
			| BS4518 -0593-57 | 
			59.3 | 
			2.335 | 
		
		
			| BS4518 -0623-57 | 
			62.3 | 
			2.453 | 
		
		
			| BS4518 -0643-57 | 
			64.3 | 
			2.531 | 
		
		
			| BS4518 -0693-57 | 
			69.3 | 
			2.728 | 
		
		
			| BS4518 -0743-57 | 
			74.3 | 
			2.925 | 
		
		
			| BS4518 -0793-57 | 
			79.3 | 
			3.122 | 
		
		
			| BS4518 -0843-57 | 
			84.3 | 
			0.5 | 
			3.319 | 
			0.020 | 
		
		
			| BS4518 -0893-57 | 
			89.3 | 
			3.516 | 
		
		
			| BS4518 -0943-57 | 
			94.3 | 
			3.713 | 
		
		
			| BS4518 -0993-57 | 
			99.3 | 
			3.909 | 
		
		
			| BS4518 -1043-57 | 
			104.3 | 
			4.106 | 
		
		
			| BS4518 -1093-57 | 
			109.3 | 
			4.303 | 
		
		
			| BS4518 -1143-57 | 
			114.3 | 
			4.500 | 
		
		
			| BS4518 -1193-57 | 
			119.3 | 
			4.697 | 
		
		
			| BS4518 -1243-57 | 
			124.3 | 
			0.6 | 
			4.894 | 
			0.024 | 
		
		
			| BS4518 -1293-57 | 
			129.3 | 
			5.091 | 
		
		
			| BS4518 -1343-57 | 
			134.3 | 
			5.287 | 
		
		
			| BS4518 -1393-57 | 
			139.3 | 
			5.484 | 
		
		
			| BS4518 -1443-57 | 
			144.3 | 
			5.681 | 
		
		
			| BS4518 -1493-57 | 
			149.3 | 
			5.878 | 
		
		
			| BS4518 -1543-57 | 
			154.3 | 
			6.075 | 
		
		
			| BS4518 -1593-57 | 
			159.3 | 
			6.272 | 
		
		
			| BS4518 -1643-57 | 
			164.3 | 
			6.469 | 
		
		
			| BS4518 -1693-57 | 
			169.3 | 
			6.665 | 
		
		
			| BS4518 -1743-57 | 
			174.3 | 
			6.862 | 
		
		
			| BS4518 -1793-57 | 
			179.3 | 
			7.059 | 
		
		
			| BS4518 -1843-57 | 
			184.3 | 
			0.8 | 
			7.256 | 
			0.031 | 
		
		
			| BS4518 -1893-57 | 
			189.3 | 
			7.453 | 
		
		
			| BS4518 -1943-57 | 
			194.3 | 
			7.650 | 
		
		
			| BS4518 -1993-57 | 
			199.3 | 
			7.846 | 
		
		
			| BS4518 -2093-57 | 
			209.3 | 
			8.240 | 
		
		
			| BS4518 -2193-57 | 
			219.3 | 
			8.634 | 
		
		
			| BS4518 -2293-57 | 
			229.3 | 
			9.028 | 
		
		
			| BS4518 -2393-57 | 
			239.3 | 
			9.421 | 
		
		
			| BS4518 -2493-57 | 
			249.3 | 
			9.815 | 
		
		
			| BS4518 -2593-57 | 
			259.3 | 
			1 | 
			10.209 | 
			0.039 | 
		
		
			| BS4518 -2693-57 | 
			269.3 | 
			10.602 | 
		
		
			| BS4518 -2793-57 | 
			279.3 | 
			10.996 | 
		
		
			| BS4518 -2893-57 | 
			289.3 | 
			11.390 | 
		
		
			| BS4518 -2993-57 | 
			299.3 | 
			11.783 | 
		
		
			| BS4518 -3093-57 | 
			309.3 | 
			1.5 | 
			12.177 | 
			0.059 | 
		
		
			| BS4518 -3193-57 | 
			319.3 | 
			12.571 | 
		
		
			| BS4518 -3393-57 | 
			339.3 | 
			13.358 | 
		
		
			| BS4518 -3593-57 | 
			359.3 | 
			14.146 | 
		
		
			| BS4518 -3793-57 | 
			379.3 | 
			14.933 | 
		
		
			| BS4518 -3893-57 | 
			389.3 | 
			15.327 | 
		
		
			| BS4518 -3993-57 | 
			399.3 | 
			15.720 | 
		
		
			| BS4518 -4193-57 | 
			419.3 | 
			2 | 
			16.508 | 
			0.079 | 
		
		
			| BS4518 -4393-57 | 
			439.3 | 
			17.295 | 
		
		
			| BS4518 -4593-57 | 
			459.3 | 
			18.083 | 
		
		
			| BS4518 -4793-57 | 
			479.3 | 
			18.870 | 
		
		
			| BS4518 -4893-57 | 
			489.3 | 
			19.264 | 
		
		
			| BS4518 -4993-57 | 
			499.3 | 
			19.657 | 
		
		
			| BS4518 -1441-84 | 
			144.1 | 
			0.6 | 
			8.4 | 
			0.15 | 
			5.673 | 
			0.024 | 
			0.331 | 
			0.006 | 
		
		
			| BS4518 -1491-84 | 
			149.1 | 
			5.870 | 
		
		
			| BS4518 -1541-84 | 
			154.1 | 
			6.067 | 
		
		
			| BS4518 -1591-84 | 
			159.1 | 
			6.264 | 
		
		
			| BS4518 -1641-84 | 
			164.1 | 
			6.461 | 
		
		
			| BS4518 -1691-84 | 
			169.1 | 
			6.657 | 
		
		
			| BS4518 -1741-84 | 
			174.1 | 
			6.854 | 
		
		
			| BS4518 -1791-84 | 
			179.1 | 
			7.051 | 
		
		
			| BS4518 -1841-84 | 
			184.1 | 
			0.8 | 
			7.248 | 
			0.031 | 
		
		
			| BS4518 -1891-84 | 
			189.1 | 
			7.445 | 
		
		
			| BS4518 -1941-84 | 
			194.1 | 
			7.642 | 
		
		
			| BS4518 -1991-84 | 
			199.1 | 
			7.839 | 
		
		
			| BS4518 -2041-84 | 
			204.1 | 
			8.035 | 
		
		
			| BS4518 -2091-84 | 
			209.1 | 
			8.232 | 
		
		
			| BS4518 -2191-84 | 
			219.1 | 
			8.626 | 
		
		
			| BS4518 -2291-84 | 
			229.1 | 
			9.020 | 
		
		
			| BS4518 -2341-84 | 
			234.1 | 
			9.217 | 
		
		
			| BS4518 -2391-84 | 
			239.1 | 
			9.413 | 
		
		
			| BS4518 -2491-84 | 
			249.1 | 
			9.807 | 
		
	
 
		 
	 
 
				
			 
		 
		
		 
		
		
		
		
			
		
	
	
	
		
			
				
				
					
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