BOLTED NECK JOINT - THREADED BRASS INSERTS

[charles Tauber]

On the subject of stainless steel fasteners...

If you are going to use stainless steel fasteners on stainless steel fasteners, to avoid galling, use a different series stainless for nut/insert and bolt/stud. If you don't, they'll be as good as welded together once you thread one onto the other. You'll be mighty unhappy if/when it comes time to remove or loosen the bolt.

The inserts posted earlier are 18/8 stainless (aka 304 series). If using those, use a different, non-300 series stainless bolt, such as a 400 series stainless.

https://en.wikipedia.org/wiki/Galling

[Big Band Guitar]

Originally Posted by charles Tauber

On the subject of stainless steel fasteners...

If you are going to use stainless steel fasteners on stainless steel fasteners, to avoid galling, use a different series stainless for nut/insert and bolt/stud. If you don't, they'll be as good as welded together once you thread one onto the other. You'll be mighty unhappy if/when it comes time to remove or loosen the bolt.

The inserts posted earlier are 18/8 stainless (aka 304 series). If using those, use a different, non-300 series stainless bolt, such as a 400 series stainless.

https://en.wikipedia.org/wiki/Galling

A little dab of Never-Sieze should take care of that. Most auto part stores have small packets near the checkout.

[H165]

It occurs to me that Stainless Steel lag bolts have really sharp threads and may make for a better tap than a galvanized lag.

I use the galvanized lag because it has a couple of advantages for me:

1. The overall sizes (barrel and thread O.D.s) more closely match the insert I use. The stainless and plated lags are slightly smaller.

2. The galvanized threads are rough, making a more abrasive cutting edge for the tapping.

I personally would still tap the holes. This way, you're cutting the threads not displacing wood- and that could have disastrous results depending on what wood you use.

Agree. I tapped because I went into somewhat harder (Janka scale) wood. So far, I have found mahogany and cedar more forgiving than CA-glue-impregnated maple or rosewood (Cedar = 600, Genuine Mahogany = 800, Hard Maple = 1450, EIR = 2440). ref: https://www.bellforestproducts.com/info/janka-hardness/

[murrmac123]

Originally Posted by LouieAtienza

Or better yet, use threaded studs on the neck heel, and use cap bolts (internally threaded) inside the guitar. .

Louie, do you have a link to where it might be possible to buy internally threaded cap bolts ?

[Big Band Guitar]

How to install

http://woodgears.ca/reader/walters/s...ns.html#insert