Where can I find a knob or rod or bolt with 3/8 32 size?

[Jon Shiu]

A knob broke off when my old wooden tripod fell. The threaded post size, as near as I can tell, is 3/8" diameter and 32 threads per inch? Seems like an uncommon size now?

Jon

[Richard Wasserman]

McMaster-Carr has hex nuts that size—can you make that work? http://www.mcmaster.com/#hex-nuts/=os5vno

[Amedeus]

That is indeed an uncommon size. Standards are 3/8-16 and 3/8-24 ... looks like a custom job or possibly replace also the socket ...

[Amedeus]

McMaster-Carr has hex nuts that size—can you make that work? http://www.mcmaster.com/#hex-nuts/=os5vno

Funny they have the nuts but not the bolts or anything else that looks like a bolt in 32 TPI thread ...

[Jon Shiu]

Ack. My measurement was too crude. I'll try to get a more accurate gauge.

Okay, here are some new dimensions: the major diameter is .309" (about 5/16"?) and the thread is about 32 tpi as near as I can tell.

Jon

[Leigh]

... 3/8" diameter and 32 threads per inch? Seems like an uncommon size now?

That is indeed an uncommon size.

The 3/8"-32 thread is one of the most common in existence.

It's found on every volume control and similar control on (almost) every piece of electronic equipment ever made.
It's also used for the mounting bushings on rotary switches and other user controls.

Reid Supply carries a large assortment of knobs of various types, here: http://www.reidsupply.com/products/k...-wheels/knobs/

Similarly, McMaster-Carr has knobs with threaded holes: http://www.mcmaster.com/#machine-com...-knobs/=os6qfa

We need a better definition of what you want. A knob is not the same as a rod or bolt, unless you want one with a shaft attached.

- Leigh

[Jerry Bodine]

Ack. My measurement was too crude. I'll try to get a more accurate gauge.

Okay, here are some new dimensions: the major diameter is .309" (about 5/16"?) and the thread is about 32 tpi as near as I can tell.

Jon

Seems to fit in the UNEF thread series:
http://thread-chart.ueuo.com/UNC-UNF...ification.html

[Leigh]

Seems to fit in the UNEF thread series:

The 32TPI thread is used in every size from 1/8" diameter up to very large.

It's the standard "extra fine" thread in the imperial system.

- Leigh

[mpirie]

Could it be a metric thread?

3/8" is around 10mm.......if your camera is European, then it may be metric?

Mike

[Bob Salomon]

What brand tripod?