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Old August 26, 2022, 01:29 PM   #1
Dfariswheel
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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.
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Old August 26, 2022, 02:15 PM   #2
cavediver27
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Likely because they are made in China where metric is the norm.
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Old August 26, 2022, 05:00 PM   #3
jmhyer
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“There are two types of countries in this world…
Those that use the metric system, and those that have been to the moon.”
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Old August 26, 2022, 06:32 PM   #4
GlenF
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Appreciate the heads up.

Now to find a more reputable company for my never ending cleaning brush jobs.
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Old August 27, 2022, 11:07 PM   #5
sako2
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Well it's not a m8 size. 8mm is = about 5/16.
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Old August 28, 2022, 09:05 AM   #6
stinkeypete
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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.
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Old August 28, 2022, 05:10 PM   #7
FITASC
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Quote:
Now to find a more reputable company for my never ending cleaning brush jobs.
.

ProShot- best quality and US made
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Old August 30, 2022, 08:39 PM   #8
rkbanet
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“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.
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Old August 31, 2022, 03:31 PM   #9
Unclenick
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"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.
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