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MG parts spares and accessories are available for MG T Series (TA, MG TB, MG TC, MG TD, MG TF), Magnette, MGA, Twin cam, MGB, MGBGT, MGC, MGC GT, MG Midget, Sprite and other MG models from British car spares company LBCarCo.

MG TD TF 1500 - Heli-Coils

Do I order a 5/8 Heli-Coil for a 5/8 bolt? This is for one of my tractors, so please forgive for not applying this to our cars, but I know some of you fellas have used them and could give me an answer. I have a stripped out housing due to a loose bolt. Will a 5/8 Heli-Coil put them back as original? Been a long time since I ordered these and forgot the kit size for a specific bolt. Thanks in advance. PJ
Paul161

Paul, is 5/8 the diameter of the bolt, or the size of the wrench that fits it? Bud
Bud Krueger

Bud, 5/8 is the size of the bolt shaft, takes a 15/16 wrench. I forgot if I have to order and oversize coil or if the right size is listed as a 5/8 coil. PJ
Paul161

You also need to specify the pitch of the thread.

Jim B.
JA Benjamin

Thanks Jim. PJ
Paul161

You buy them by size you are repairing, Paul.
McMaster-Carr has the following 5/8" sizes available in standard ones. I never knew there were so many different styles!

Internal Thread Length Qty. P/N Cost

5/8"-11 0.625" 5 91732A394 10.85
5/8"-11 0.938" 1 91732A218 3.50
5/8"-11 1.250" 1 91732A395 3.56
5/8"-18 0.625" 1 91732A541 2.35
5/8"-18 0.938" 1 91732A238 3.50

I can't get the Columns right....but you can get the idea.


Mike TF-8257
M Brand

Thanks Mike, I ordered a complete set with drill bit, tap insertion tools etc. Didn't realize that a lot of sets do not come with the appropriate drill bit. PJ
Paul161

This thread was discussed between 05/10/2015 and 06/10/2015

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