Monster Cable 400 Series Heavy Duty Firewall Grommet / Bulkhead

[onebadmonte 235]

I'm in the works of a 3k Watt build. This a first for me. I've been scouring the net for the best

deals on the parts required for such a build. Some of those deals have been once in a life time deals,

but every once and a while there is one that I can share. This is one of those. It's hard to imagine

Monster Cable products and good deal in the same sentence, but it's true. Normally one is left to his

own devices when passing 1/0 gauge cable through sheet metal. I picked these up from Amazon.com

My link

I really couldn't find any dimensional info on them, so I took a gamble in hopes they'd work with my

1/0 radaflex welding cable. Luckily they sinched down on my cable no problem. They advertise

corrosion resistant, which means plastic. I'd avoid putting them any closer than 8 inches to any

exhaust components. Here are some pics.

Fully compressed the inside diameter measured .570" at the smallest diameter and .620 at the largest

diameter.

Overall length was about 1.650" give or take.

For the through hole I recommend a 1" hole saw. A little filing might be required.

The hex on the main body is just over 1.250"

Max diameter through the main body is .750"

The compression nut measured just over 1.250" like the main body.

The through hole on the compression nut measured .725" a bit smaller than the through hole on the main

body. Looks like there is enough material on it that you could file some off if you needed it to be a

bit bigger.

Here is some info not pictured.

Jam Nut Dims: Thickness .270" Hex Size across the flats 1.387"

Max panel thickness this item can be used on is .250"

Thanks for looking.

[Tirefryr 1,742]

That's a great deal since you get a pair. Nice find! They usually are about that price for a single one.

[Aaron Clinton 2,372]

Nice job on taking measurements for people to see.

[todd.brust 29]

I've seen those but not seen them used.....hmmm

[Tirefryr 1,742]

I've seen those but not seen them used.....hmmm

IMO, this is the only type of grommet/bushing to use. It locks down on the cable and provides a water-tight seal on either end and provides support for the cable versus a standard grommet where you have a hole and the wire can move and over time wear through the insulation.

[koneco 0]

Even I'll buy from Monster if the price is right. But, seriously, Noel Lee needs to screw off.

[Ohjay 116]

Just what I've been looking for, thanks for shedding some light. Water tight would be a big plus since I drive a 4x4 that gets put through it's paces EVERY chance I get to play in the mud and snow, creek, etc.

[95Honda 486]

I really like those and have used them for almost 10 years now, Different brands in the beginning, but those exact ones now. I actually use them for home audio equipment alot when the cable comes directly out of the equipment (like the power filterers I build that use 10-3 SJ cable)

Only gripe? Don't use a sock and try and tighten it, that plastic nuts is super easy to break... It just snaps, it won't strip, just snaps... Happened to me twice...

[95Honda 486]

Great pictures, BTW...