The Firing Line Forums

Go Back   The Firing Line Forums > The Skunkworks > Gear and Accessories

Thread Tools Search this Thread
Old August 26, 2022, 01:29 PM   #1
Senior Member
Join Date: May 4, 2001
Posts: 7,420
Notice: Hoppe's is now metric

Apparently Hoppe's has gone metric on their cleaning gear and brushes will no longer fit American SAE threaded rods.

I recently bought a Hoppe's Tornado shotgun brush and two 9mm pistol brushes.

The packages specifically state that the shotgun brush is the standard 5/16-27 threads, and the pistol brushes are standard 8-32.

I was rather surprised that the shotgun brush would not screw into my standard shotgun rod, and the pistol brushes were a very loose fit in my pistol and rifle rods.

In fact, the shotgun brush is a metric M8x1 and the pistol brushes appear to be a M4×0.7

On another site we've been discussing this and one member has written a letter to the company boss.

Attempts to contact Hoppe's lead to the Bushnell company who now own it.

These attempts have not gotten any useful info, other then to write them a letter or call.

So, if you buy new cleaning gear, be aware that it's now metric and will not interchange with your American SAE gear.
Dfariswheel is offline  
Old August 26, 2022, 02:15 PM   #2
Senior Member
Join Date: December 26, 2004
Location: Idaho
Posts: 496
Likely because they are made in China where metric is the norm.
cavediver27 is offline  
Old August 26, 2022, 05:00 PM   #3
Senior Member
Join Date: June 19, 2012
Location: MS - USA
Posts: 895
“There are two types of countries in this world…
Those that use the metric system, and those that have been to the moon.”
jmhyer is offline  
Old August 26, 2022, 06:32 PM   #4
Join Date: April 4, 2011
Location: Monett, Missouri
Posts: 90
Appreciate the heads up.

Now to find a more reputable company for my never ending cleaning brush jobs.
GlenF is offline  
Old August 27, 2022, 11:07 PM   #5
Senior Member
Join Date: April 12, 2009
Posts: 699
Well it's not a m8 size. 8mm is = about 5/16.
sako2 is offline  
Old August 28, 2022, 09:05 AM   #6
Senior Member
Join Date: July 22, 2010
Location: Madison, Wisconsin
Posts: 1,194
5/16 x 27 is hardly “standard”… it’s an annoying oddball thread that feels only useful for preventing me from grabbing a tap from my tool box and tapping a nice hardwood dowel to make a one piece shotgun rod! I would love to know the history of how that odd threading became “standard”.

I already need an adapter to use a shotgun brush on a rifle rod, so… it’s just a different adapter.

Face it, fellas. It’s not just China that uses the metric system, it’s the entire world.

Let’s look at the kilometer. 1000 meters in a kilometer. 100 cm in a meter. 10mm in a cm.

The mile: 8 furlongs per mile, the number of farm fields am English king decreed. 220 yards per furlong, the length the average English ox can plow a row before it needs rest and turns around, determining length of a plowed field. 3 feet per yard, based on the kings foot and arm. 12 inches per foot, based on the kings thumb. That’s a convenient 5280 feet per mile.

It’s a huge waste of time. But we insist on not improving.
I hunt, shoot bullseye, plink, reload, and tinker with firearms. I have hung out with the Cowboy Action fellas. I have no interest in carrying firearms in urban areas.
stinkeypete is offline  
Old August 28, 2022, 05:10 PM   #7
Senior Member
Join Date: December 6, 2014
Posts: 6,288
Now to find a more reputable company for my never ending cleaning brush jobs.

ProShot- best quality and US made
"I believe that people have a right to decide their own destinies; people own themselves. I also believe that, in a democracy, government exists because (and only so long as) individual citizens give it a 'temporary license to exist'—in exchange for a promise that it will behave itself. In a democracy, you own the government—it doesn't own you."- Frank Zappa
FITASC is offline  
Old August 30, 2022, 08:39 PM   #8
Join Date: April 16, 2012
Posts: 64
“There are two types of countries in this world…
Those that use the metric system, and those that have been to the moon.”

I didn't realize Myanmar and Liberia went to the moon.
rkbanet is offline  
Old August 31, 2022, 03:31 PM   #9
Join Date: March 4, 2005
Location: Ohio
Posts: 20,459
"To the moon, Alice! To the moon!"

27 TPI is about 0.94 mm pitch, so M8×1 was as close as they could get with a standard metric thread. A 6% pitch error between rod and jag or bore mop would grind you to a halt after a few turns. The M4×0.7 is a non-starter. 32 TPI is 0.795 mm, so 0.8 mm would be the closest. 4 mm is narrower than #8 by about 0.015", so they just won't fit well.
Gunsite Orange Hat Family Member
CMP Certified GSM Master Instructor
NRA Certified Rifle Instructor
NRA Benefactor Member and Golden Eagle
Unclenick is offline  

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

All times are GMT -5. The time now is 12:03 AM.

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2023, vBulletin Solutions, Inc.
This site and contents, including all posts, Copyright © 1998-2021 S.W.A.T. Magazine
Copyright Complaints: Please direct DMCA Takedown Notices to the registered agent:
Page generated in 0.05418 seconds with 8 queries