|
Joined: Feb 2009
Posts: 13,035
Campfire Outfitter
|
OP
Campfire Outfitter
Joined: Feb 2009
Posts: 13,035 |
Boys I need some help. My old Mauser came with a Williams rear sight but without the aperture. I've got a spare Lyman but it won't thread in more than 1/2 a turn, or so. They are supposed to be threaded the same. 7/32-40 Any ideas short of chasing the threads? It might be simply a case of too much paint in the threads.
Last edited by John_Boy; 06/12/19.
I am the way, the truth, and the life: no one comes to the Father but by me. John 14:6
|
|
|
|
Joined: Feb 2010
Posts: 17,880 Likes: 3
Campfire Ranger
|
Campfire Ranger
Joined: Feb 2010
Posts: 17,880 Likes: 3 |
Here's a bit of useful information that will save you money and may solve your problem. 7/32-40 is a special thread that is hard to find and costly, #12-40 on the other hand is a common fine thread size that is commonly employed with lock hardware. It is commonly available and is not a costly item. There is only .002" difference in the major diameter (outside diameter) of the two threads, not enough to make any difference. I learned this lesson several years ago when I was considering making sight aperture discs. Hope you find this little kernel of information interesting and of use. MSC Industrial Supply and McMaster-Carr both carry #12-40 taps & dies, you would want a bottom tap to go in the shallow hole in the Williams sight. Inexpensive carbon steel tap & die will work fine for a one time job, no need for High Speed Steel.
Last edited by gunswizard; 06/12/19.
|
|
|
|
Joined: Feb 2009
Posts: 13,035
Campfire Outfitter
|
OP
Campfire Outfitter
Joined: Feb 2009
Posts: 13,035 |
gunswizard, Thank you. That's the kind of information I'm looking for. John
I am the way, the truth, and the life: no one comes to the Father but by me. John 14:6
|
|
|
|
Joined: Feb 2009
Posts: 13,035
Campfire Outfitter
|
OP
Campfire Outfitter
Joined: Feb 2009
Posts: 13,035 |
I am the way, the truth, and the life: no one comes to the Father but by me. John 14:6
|
|
|
|
Joined: Nov 2005
Posts: 23,155 Likes: 6
Campfire Ranger
|
Campfire Ranger
Joined: Nov 2005
Posts: 23,155 Likes: 6 |
I have a 7/32-40 tap. (Easy to find if you know where to look- model railroading emporiums. I paid $7+change for it.) PM me if you want to borrow it.
"You can lead a man to logic, but you cannot make him think." Joe Harz "Always certain, often right." Keith McCafferty
|
|
|
|
Joined: Feb 2009
Posts: 13,035
Campfire Outfitter
|
OP
Campfire Outfitter
Joined: Feb 2009
Posts: 13,035 |
Will do. Thank you for your help.
I am the way, the truth, and the life: no one comes to the Father but by me. John 14:6
|
|
|
|
Joined: Aug 2012
Posts: 2,436
Campfire Regular
|
Campfire Regular
Joined: Aug 2012
Posts: 2,436 |
|
|
|
|
Joined: Feb 2009
Posts: 13,035
Campfire Outfitter
|
OP
Campfire Outfitter
Joined: Feb 2009
Posts: 13,035 |
Takes all the fun out of it.... Midway has them for $9.95 but shipping jumps it up. I bought a new one from Graf for $8.95 when I ordered brass and slugs for the 8x57. It was a Lyman that won't thread in. It's supposed to work according to the Lyman web site.
I am the way, the truth, and the life: no one comes to the Father but by me. John 14:6
|
|
|
|
Joined: Aug 2012
Posts: 2,436
Campfire Regular
|
Campfire Regular
Joined: Aug 2012
Posts: 2,436 |
Got a strong lens to check for a rolled thread or some other tiny catastrophe?
|
|
|
|
Joined: Feb 2009
Posts: 13,035
Campfire Outfitter
|
OP
Campfire Outfitter
Joined: Feb 2009
Posts: 13,035 |
Well it's not the sight itself. It's the new, just purchased aperture. The thread start has a burr..... Return, or get out the file??? It only cost eight bucks.....
I am the way, the truth, and the life: no one comes to the Father but by me. John 14:6
|
|
|
|
Joined: Feb 2009
Posts: 13,035
Campfire Outfitter
|
OP
Campfire Outfitter
Joined: Feb 2009
Posts: 13,035 |
Not the burr. Diameter of this one - .0221 Diameter of the one that fits - .0198
I am the way, the truth, and the life: no one comes to the Father but by me. John 14:6
|
|
|
|
Joined: Jan 2018
Posts: 139
Campfire Member
|
Campfire Member
Joined: Jan 2018
Posts: 139 |
I have several Lyman 57 SML Tang peeps, and a few Williams, The Williams Apertures will thread right in the Lyman’s perfectly, But a Lyman Aperture will NOT go in the Williams.
“Absolutely nothing is good enough if it can be made better. And better is never good enough if it can be made best." Author Unknown
|
|
|
|
Joined: Feb 2009
Posts: 13,035
Campfire Outfitter
|
OP
Campfire Outfitter
Joined: Feb 2009
Posts: 13,035 |
Agreed. Yet their web site chains they will. The caliper says they won't.
I am the way, the truth, and the life: no one comes to the Father but by me. John 14:6
|
|
|
|
Joined: Jun 2019
Posts: 10,055 Likes: 11
Campfire Outfitter
|
Campfire Outfitter
Joined: Jun 2019
Posts: 10,055 Likes: 11 |
Victor Machinery Co. has 12-40 taps and dies at reasonable cost. I've been buying machinist's tooling from them for several years. They list the 7/32-40 tap on the website, but not the die. www.victornet.comJerry
Ignorance can be fixed. Stupid is forever!
|
|
|
|
Joined: Feb 2009
Posts: 13,035
Campfire Outfitter
|
OP
Campfire Outfitter
Joined: Feb 2009
Posts: 13,035 |
I talked to a local friend who is supposed to have a tap that will work. If not I'll check into these sources.
I am the way, the truth, and the life: no one comes to the Father but by me. John 14:6
|
|
|
|
597 members (10Glocks, 10ring1, 12344mag, 16Racing, 1234, 1badf350, 66 invisible),
2,493
guests, and
1,353
robots. |
Key:
Admin,
Global Mod,
Mod
|
|
Forums81
Topics1,194,348
Posts18,526,992
Members74,031
|
Most Online11,491 Jul 7th, 2023
|
|
|
|