looking for Source for 10-36 set screw for older lyman 4 cavity

[happy7]

Lyman currently (sensibly) uses 10-32 set screws for the sprue plate bolt on their 4 cavity molds. But I have a couple older molds with 10-36 threads. Does anyone know where I can get 10-36 set screws these days? I called Lyman and they don't have them. A Lowes and a local hardware as well as a google search also turned up nothing.

[montana_charlie]

where I can get 10-36 set screws these days?
I checked my favorite online hardware store, and found zilch, but...

The screws used for mounting tang sights on Sharps rifles are 10-36. They aren't 'set screws' but could be cut off and 'slotted' for a standard screwdriver.

Best I can do...
CM

[jhrosier]

These folks are listing a threading die:

http://www.msdiscount.com/columnar.aspx?category_site=STARTOOL&cat_id=1188&prod_id=30303&referer=http%3A//www.google.com/search%3Fhl%3Den%26lr%3D%26as_qdr%3Dall%26q%3D+%25 2210-36%2522+thread+OR+screw%26btnG%3DSearch&compidcookieset&sessioncookieset

Jack

[quasi]

how about retapping to 10-32, or an insert-helicoil?

[Morgan Astorbilt]

Tap it 12-28 (#14 drill) or 12-24 (#16 drill)
Morgan

[docone31]

Allen screws are usually fine threads. They are grade 8. I saw some at Ace Hardware. If the head does not create issues, use one of those.

[Buckshot]

...............A 10-36 is a NF-Special. Here ya go:

Head Cap Screws - Socket Products Type: Socket Head Cap Screws Thread Size: 8-36 Length Under Head: 1-1/2 Material: Alloy Steel - ASTM A574 Finish/Coating: Black Oxide
MSC # 76819762 | Big Book Page 1842
Price: $5.09 ea

At: www.mscdirect.com

or:

http://www1.mscdirect.com/CGI/GSDRVSM?PMTYPE=KEY&SISMNO=4271612&SIPCNO=0002006709&SIZZNO=18025010&SIS0NO=840226&SISHNO=0&SISRC=GO&SISRCH=1&SILEVL=3&SILSEQ=12&SIT4NO=42708438

Call them up and when you order specify they ship USPS ist class or some such so you're not paying $8-10 for a couple screws!

My QC box does 36 tpi, but I sure wouldn't want to mess around single pointing on a piece of #10 blank :-)

..............Buckshot

[Morgan Astorbilt]

...............A 10-36 is a NF-Special. Here ya go:

Head Cap Screws - Socket Products Type: Socket Head Cap Screws Thread Size: 8-36 Length Under Head: 1-1/2 Material: Alloy Steel - ASTM A574 Finish/Coating: Black Oxide
MSC # 76819762 | Big Book Page 1842
Price: $5.09 ea

At: www.mscdirect.com

or:

http://www1.mscdirect.com/CGI/GSDRVSM?PMTYPE=KEY&SISMNO=4271612&SIPCNO=0002006709&SIZZNO=18025010&SIS0NO=840226&SISHNO=0&SISRC=GO&SISRCH=1&SILEVL=3&SILSEQ=12&SIT4NO=42708438

Call them up and when you order specify they ship USPS ist class or some such so you're not paying $8-10 for a couple screws!

My QC box does 36 tpi, but I sure wouldn't want to mess around single pointing on a piece of #10 blank :-)

..............Buckshot

Buckshot, the same item came up when I searched their on-line catalog. Look again, it's an 8-36 screw, not 10-36. I checked page 1842 of my Big Book, and it isn't listed, that page has stripper bolts and shoulder screws. Then noticed it's the 2006/2007 catalog, they haven't sent me a new one yet.
Morgan

[happy7]

Thanks for the ideas. You all are some sharp cookies!

[gunwonk]

Resurrecting old thread, because I just ran into this problem myself. I bought a Lyman DC 31141 with the sprue plate gone, screw broken off, price was right. Sent off to Lyman for the rebuild kit, which came with a 10-32 sprue plate screw, but the mold wanted 10-36.

All good advice above -- and I know about replacement 10-36 screws being available -- but I decided to just re-tap the mold 10-32. Key to making this work was a fluteless 10-32 tap, which swages threads instead of cutting. These are pretty common, but here's a pic:
264546
It also helps a lot that there are only about 4-5 threads of 10-36 in either of the two places they're used on that mold (sprue plate screw, and set screw). The swaging tap is going to push the existing threads back & forth, but 4-5 threads (and 36 vs. 32/inch) is a short enough run that the very last thread would only have to move about 1 thread pitch, and because I just free floated it by hand (with a bit of moly grease), I figure the threads at either end moved maybe 1/2 a pitch, and the ones in the middle less than that.

Job done, the new threads look good, feel smooth & snug, everything went together correctly, and now I've got a working 31141. :)