9/32 x 20 screw

Are you sure it isn't 1/4 -20? If you are how about buying a 3/16 Stainless and turning just the threads? Roger

The original manufacturer? Sure it isn't metric? Much of the medical equipment I've run into lately has had metric threads. Would be approximately 7mm-.8, which is not standard, 7-.75 is. The inch thread you ask for is a bastard size, nothing standard. I'd redrill and tap it to 8mm fine pitch, which you can find just about everywhere.

Stan

Could you install a 1/4-20 Helicoil?

I did some checking and didn't run into that one. Have you considered contacting the manufacturer of the leg brace? You might find they support their product and will send you the screw^H^H^H^H^Hfastener.

Wes

I very carefully verified that it is not 7MM x 1mm thread. I need 9/32 x 20 tpi. Weird and special. I am modifying the brace to make it easier for momma to put on. So, no help from manufacturer. I can make one, just takes a while. She's worth it.

Karl

Call Medco at 847-296-3021, talk to Diane first. I bought some things from them and they make such screws, IIRC. They probably will not sell retail, but they may direct you to someone. Some of these screws are outright weird looking, shaped like bee bodies etc.

Try Winkley Orthotics & Prosthetics in Golden Valley.

They're a short block north of Hwy 55 on Douglas Drive. Or, try this: snipped-for-privacy@winkley.com

Thanks, I'll put "the Kid" on this. He works near there.

Karl

Thanks, I'll give them a try

Karl

A medical device is *far* more likely to use metric fasteners than Imperial. I'm guessing that what you really need is M8-1.25, maybe M7.

Any reason you couldn't just slot the head instead of trying to make the (I'm assuming hex) socket. Alternatively, make a DIY hex broach out of a piece of hex key. Maybe I'm misunderstanding what the problem is.

David Merrill

Karl,,,,, please keep us informed as to your final solution. Roger

Yes, I doubt if they're a mile apart.

No joy at two suggested contact places so I'm building from scratch. Instead of a socket head, I'm going with a small (1/4") hex bolt head and buy a couple 1/4" socket screwdrivers. I could burn a socket with my EDM, but would be really hard to do. I'm going to run it on the CNC lathe and make enough for no worry about losing one.

These got to ship Monday morning. Its help your momma priority.

Karl

If it helps, two crossed slots make a Phillips recess, or buy a 5/16" or 8mm stainless socket head with a long shank you can turn down and thread.

jsw

A 9/32 thread is a pretty odd thread...did you measure with a micrometer or calipers?

.281" is 9/32......... 7mm is .275"

did you try 7mm x 1.25.

that would be .275" x 20.32 tpi

cheers Bob

Karl,

This might be a whitworth thread spec. If so you might have trouble if you don't get the geometry correct.