Thread on Shot Gun Cleaning Brush

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10 Wheeler Rob
Posts: 1546
Joined: Tue Mar 21, 2006 2:44 pm
Location: East Hartford, CT

Thread on Shot Gun Cleaning Brush

Post by 10 Wheeler Rob »

A friend of mine has an older cleaning rod and the newer brushes will not screw in. It appears the rod has a 5/16"-28 thread and the new brushes are 5/16"-27 thread. I looked on the web and confirmed brushes being sold with a 27 thread pitch.

Now my question: Can anyone explain why a cleaning rod and brushes need such a non standard thread? Only reason I can think of is to create a captive market so as to charge more money needlessly.

A 5/16"-24 UNF thread would work just fine, and any machine shop would have the tap and dies for making parts and doing repairs.

Rob
hammermill
Posts: 2938
Joined: Sun Jun 27, 2010 10:43 pm
Location: pendleton or

Re: Thread on Shot Gun Cleaning Brush

Post by hammermill »

captive marketing, special threads happens all the time in the gun world, try mounting a scope and see all the differient thing manf,s can come up with
Bob C
Posts: 42
Joined: Sun May 31, 2009 11:28 am
Location: S.E. Mass

Re: Thread on Shot Gun Cleaning Brush

Post by Bob C »

Rob
According to a chart I have 5/16 27 is a gas brass pipe thread.

And I agree it is a PITA to mate it to an old cleaning rod.

bob C
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