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Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
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| | | | Joined: Jun 2005 Posts: 168 'Bolter | | 'Bolter Joined: Jun 2005 Posts: 168 | Does anyone know what the thread size is on the zerks for the shackle pins? Really I just need to know if it's NPT or not because my hardware store has both and I didn't know which to get.
Liquidated my projects
Now looking for a decent '47-'55.1 3100, 3600, or 3800
| | | | | Joined: Jan 2015 Posts: 914 'Bolter | | 'Bolter Joined: Jan 2015 Posts: 914 | NPT and what is the other one?
The only thread difference I know is that some have a taper and some the threads are straight though the both of them have the same thread per inch.
So either one should fit but the straight thread one will not screw in as deep if the female hole was tapped NPT. Jeffrey | | | | | Joined: Feb 2004 Posts: 29,743 Kettle Custodian (pot stirrer) | | Kettle Custodian (pot stirrer) Joined: Feb 2004 Posts: 29,743 | The fittings with the small-diameter threads are 1/4"-28 thread, same as 1/4" UNF or SAE bolts. The bigger ones have a tapered thread, 1/8" NPT pipe threads. Most of the fittings found on tie rods, ball joints, etc. are 1/4-28 and install with a 5/16" hex wrench or socket.
Jerry
"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!
| | | | | Joined: Jun 2004 Posts: 8,597 Riding in the Passing Lane | | Riding in the Passing Lane Joined: Jun 2004 Posts: 8,597 | The king pins & shackle pins use the 1/8 in. pipe thread.
They say money can't buy happiness. It can buy old Chevy trucks though. Same thing. 1972 Chevy c10 Cheyenne SuperIn the Gallery Forum | | | | | Joined: Jun 2005 Posts: 168 'Bolter | | 'Bolter Joined: Jun 2005 Posts: 168 | Thanks guys, that's what I needed
Liquidated my projects
Now looking for a decent '47-'55.1 3100, 3600, or 3800
| | | | | Joined: May 2005 Posts: 8,878 . | | . Joined: May 2005 Posts: 8,878 | | | |
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