Check out this post a simple.
													
																	O ring gauge chart. 
									
	
		
	
																	Find as568 o ring standard sizes by cross section inside diameter and outside diameter in our o ring size chart and separate o ring tolerance chart. 
																	Lightly clamp the jaws of the caliper onto the o ring but do not compress it. 
																	The seal material under mechanical pressure extrudes into the microfi ne grooves of the gland. 
																	Select a size to buy standard and custom o rings from the world s largest inventory network or custom orders can be made within a few weeks typically without tooling fees. 
															
													
									
	
		
	
																	More resources and quick links. 
																	Shop our selection of popular brand o rings like alfas buna epr viton and more. 
																	Metric and inch cross section thickness reference gauge. 
																	O ring is mechanically squeezed out of round between the outer and inner members to close the fl uid passage. 
															
													
									
	
		
	
																	Note that the o ring has been. 
																	Quick reference tape measure confirms metric size o rings 64mm 665mm inside diameter on one side and usa as568 standard o ring sizes from 2 5 id to 26 inside diameter on the other side. 
																	Record the thickness of the ring the cross section see image for reference. 
																	The standard sizes used by o ring manufacturers in the united states are defined by aerospace standard as568b aerospace size standard for o rings.