Screw size and thread pitch ????

This is the place to talk about everything airgun related including air rifles, air pistols, pellet guns, pcp airguns and more.
Post Reply
Message
Author
User avatar
DoctorFrankengun
Posts: 1657
Joined: Thu Sep 08, 2005 1:58 pm
Location: Cochrane, Ontario Canada

Screw size and thread pitch ????

#1 Post by DoctorFrankengun »

Can anyone tell me what the size and pitch is on the little screw that holds down the front of the breach on the Crosman 13XX guns?

Image
Top
User avatar
airsmith282
Posts: 1898
Joined: Sun Sep 18, 2005 12:30 am
Location: North Bay Ontario Canada

#2 Post by airsmith282 »

what mesurements do you want for the screw i gota few in my inventory still
Top
Sergei Troizky
Posts: 54
Joined: Sun Sep 11, 2005 11:04 pm
Location: Montreal, Qc

#3 Post by Sergei Troizky »

It is M3.
Top
User avatar
DoctorFrankengun
Posts: 1657
Joined: Thu Sep 08, 2005 1:58 pm
Location: Cochrane, Ontario Canada

#4 Post by DoctorFrankengun »

Sergei Troizky wrote:It is M3.
Thanks very much. :)
Top
User avatar
DoctorFrankengun
Posts: 1657
Joined: Thu Sep 08, 2005 1:58 pm
Location: Cochrane, Ontario Canada

#5 Post by DoctorFrankengun »

airsmith282 wrote:what mesurements do you want for the screw i gota few in my inventory still
Kevin, I am planning to make a metal breach for the project gun that I got from Aaron. I will need a screw that is a bit longer than the original.
Top
User avatar
airsmith282
Posts: 1898
Joined: Sun Sep 18, 2005 12:30 am
Location: North Bay Ontario Canada

#6 Post by airsmith282 »

no problem ill see what i got in my collection of screws thats the same thred but longer ill get back to you shortly
Top
User avatar
Parker_101_
Site sponsor and moderator
Posts: 5331
Joined: Thu Sep 01, 2005 6:38 pm
Location: Southern Ontario
Contact:
Contact Parker_101_

socket head cap screw

#7 Post by Parker_101_ »

socket head cap screw #4-48...1/4" .....I found a box of these at Brafasco......
Top
User avatar
ETA
Posts: 889
Joined: Thu Sep 01, 2005 7:03 pm
Location: BC Canada

Re: socket head cap screw

#8 Post by ETA »

Parker_101_ wrote:socket head cap screw #4-48...1/4" .....I found a box of these at Brafasco......
It is indeed a #4-48.
Not a M3.

Not worth messing with other screws. Best to get it directly from Crosman. Get a whole bunch, since they are cheap. The head have be the right hight, width and shape to not interfere with the pellet feed.
Hex head is also the way to go. No over torquing and striping the tiny thread hole on the air tube.
Last edited by ETA on Sat Oct 22, 2005 3:08 pm, edited 1 time in total.
Top
User avatar
ETA
Posts: 889
Joined: Thu Sep 01, 2005 7:03 pm
Location: BC Canada

Re: 4-48

#9 Post by ETA »

Parker_101_ wrote:I have a few of the originals and the ones that i have are indeed 4-48 ....not 4-40 .....maybe a different production run?......
My bad. Went and took a mesurement, yes it is a 4-48.
Top
Sergei Troizky
Posts: 54
Joined: Sun Sep 11, 2005 11:04 pm
Location: Montreal, Qc

#10 Post by Sergei Troizky »

Well, I've succesfully used M3, then put back the original one.
Both fit. Most probably the difference is less than tapping precision.
Top
Post Reply

Return to “General Airgun Chat”