healeys
[Top] [All Lists]

[Healeys] Request for stock 6-cylinder valve cover nut dimensions

To: Healey List <healeys@autox.team.net>
Subject: [Healeys] Request for stock 6-cylinder valve cover nut dimensions
From: Patton.Dickson@gmail.com
Date: Fri, 24 Jul 2026 02:55:22 -0500
Authentication-results: autox.team.net;
Delivered-to: mharc@autox.team.net
Delivered-to: healeys@autox.team.net
Hi everyone, first post in a VERY long time

I am taking a metal lathe class this weekend, and the instructor asked us to 
bring a sketched out project to class. I plan to machine a set of period-style 
extended barrel hold-down nuts with knurled tops for an aftermarket aluminum 
valve cover I bought years ago for my BN4. 

To ensure my internal bore depth and shoulder geometry account properly for the 
factory rocker pedestal studs, I want to cross-reference my setup against the 
original factory spec. If anyone has a loose stock valve cover nut handy, could 
you verify a few quick measurements with a caliper? The valve cover nuts I have 
are the stock ones currently on my car.

 - Overall Length: Total length including the sleeve/barrel.
 - Sleeve Outer Diameter: Diameter of the lower barrel that extends down into 
the cover well.
 - Thread Depth: Effective internal thread length before the blind end.

I am pretty sure the thread spec is 5/16"-24 UNFâ??can anyone verify that as 
well?

Appreciate the help getting these numbers checked before I start the class this 
weekend.

Patton 

Patton Dickson
Plano, TX
57 â??Longbridgeâ?? BN-4
_______________________________________________
Support Team.Net http://www.team.net/donate.html
Suggested annual donation  $12.75

Archive: http://www.team.net/pipermail/healeys 
http://autox.team.net/archive/healeys

Healeys@autox.team.net
http://autox.team.net/mailman/listinfo/healeys

Unsubscribe/Manage: 
http://autox.team.net/mailman/options/healeys/mharc@autox.team.net

<Prev in Thread] Current Thread [Next in Thread>