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I am looking for a source for a 2-piece, interlocking retaining ring. It is sililar to a Truarc 5107 except smaller. .42 OD x .32 ID x .032 thick. Attached is a picture. Any ideas?

Just thought I would let everyone know that I found a solution to my problem. I was able to bond the two threaded parts together using a cyanoacrylate glue with a high shear strength, that is made for bonding metal to metal. It is Cyenergy 6103 available through Ellsworth Adhesives. I was able...

drawoh, Nope. Can't change a thing.

I am almost positive that on the OEM assembly (that I am trying to duplicate) the threads are bonded together with a cyanoacrylate glue. I tried some cyanoacrylate glue with a shear strength of 2500 psi and achieved a breakaway torque of 80 in-lb. I am waiting for some samples of a higher...

The threads on the OEM part is indeed 5/16-32 UNEF (class 2). The threads on my new parts are duplicates of the OEM parts.

Thanks to everyone for all your responses. In reference to the initial tightening torque of 25 in-lb., this must be this low because I am clamping some very fragile components between the two stainless parts (valve bodies). I cannot have the two bodies turn (and therfore crush the components)...

drawoh, The parts are assembled and tightened to only 25 in-lb. Just enough to adequately compress the gasket between them. My problem is that I want the 2 parts permanently locked together. I'm striving for a breakaway torque of 100 in-lb.

Does anyone know of a preparation done to stainless steel to increase the breakaway strength? Perhaps to make the material more active? The threads are 5/16-32 316 stainless steel. Any other suggestions other than Loctite? I would like to reach a breakaway torque of 100 in-lb.

I am still having problems getting a strong enough bond between these parts. I tried some 3M DP-110 (gray) epoxy and increased the breakaway torque to 80 in-lb. Still not as strong as the OEM part which had a breakaway torque of 105 in-lb.

I am trying to lock two mating 316 stainless steel threaded (5/16-32) parts together permanently. I need them to hold 100 in-lb breakaway torque after curing. I have tried both Loctite 262 and 2760 and the breakaway torque is only around 50 in-lb. Any suggestions? I was going to try some 3M...