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Forum topic by phlyers posted 10-23-2013 12:12 PM 949 views 0 times favorited 6 replies Add to Favorites Watch
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93 posts in 1989 days

10-23-2013 12:12 PM

Last night I picked up some 10-32 screws to mount my router on my new Kreg insert. Wierd part of it is is that the screws that came with the router are .008” bigger in diameter than a 10-32 screw. The ones that came with the router measure .192” and a 10-32 screw measures .184” It does thread in the fixed base of the router but have a very slight up and down movement. Will I be ok using the 10-32’s?

The ones that came with the router aren’t long enough to go through the insert and the plate.

6 replies so far

View Gene Howe's profile

Gene Howe

11065 posts in 3630 days

#1 posted 10-23-2013 12:16 PM

Is it possible that the originals are metric?
Most screw and bolt centers in the hardware sections have a board with several different sized and thread patterned nuts and bolts to help you match your screw/bolt/nut.

-- Gene 'The true soldier fights not because he hates what is in front of him, but because he loves what is behind him.' G. K. Chesterton

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93 posts in 1989 days

#2 posted 10-23-2013 12:17 PM

I was literally just thinking of that but why would it thread in ok?

View crank49's profile


4032 posts in 3173 days

#3 posted 10-23-2013 12:44 PM

Screws come in different thread “fit classes”.
Some of the hardware sold in box stores is made of recycled soup cans and machined to the loosest possible fit class to compensate for lack of quality control and to meet the requirement of having the lowest possible manufacturing cost.

It is possible a better grade of screw would have a tighter fit.
Generally the socket head (allen hex head socket) screws are much better quality in both material and fit.

A Metric M5 – .8mm pitch screw is very close to a 10-32 but the metric screw is slightly larger.

10-32 screw is .190” diameter and the threads are 32 threads per inch.

M5- 0.8 screw is .1968” diameter. and the .8 pitch has 31.75 threads per inch.

If you had a hole made for a M5 metric screw, a 10-32 would fit it but loosely.
Also, the threads would not bind up unless the thread engagement length was more than about 3/4 of an inch.

Perhaps your base needed a metric screw.

View poopiekat's profile


4386 posts in 3936 days

#4 posted 10-23-2013 12:52 PM

Maybe you got some 8×32 screws that got mixed in with the 10×32 bin?

-- Einstein: "The intuitive mind is a sacred gift, and the rational mind is a faithful servant. We have created a society that honors the servant and has forgotten the gift." I'm Poopiekat!!

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93 posts in 1989 days

#5 posted 10-23-2013 01:13 PM

Yea makes sense. I’ll go to Sears at lunch and get some M5’s. Thanks for the help.

View Jim Jakosh's profile

Jim Jakosh

21736 posts in 3307 days

#6 posted 10-28-2013 02:57 AM

A full 5 mm is about .195. The ones you took out are most likely 5mm….............Jim

-- Jim Jakosh.....Practical Wood Products...........Learn something new every day!! Variety is the Spice of Life!!

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