Bolts holding Starter Switch

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SavannahDog
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Bolts holding Starter Switch

Post by SavannahDog » Sat Jan 11, 2020 11:40 am

Hi, I,m trying to understand the bolt size holding the Starter Switch. 2BA is too large. Buy the way whats BA stand for anyway.
Julian Carter
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SavannahDog
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Re: Bolts holding Starter Switch

Post by SavannahDog » Sun Jan 12, 2020 10:13 pm

BA stands for British fastening before witworth.. Managed to purchase some 00, and 01 both from BA Bolts in England.
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frenchblatter
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Re: Bolts holding Starter Switch

Post by frenchblatter » Mon Jan 13, 2020 1:10 am

BA stands for British Association. See here https://en.wikipedia.org/wiki/British_A ... ew_threads
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Steve Simmons
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Re: Bolts holding Starter Switch

Post by Steve Simmons » Mon Jan 13, 2020 9:06 am

I believe the screws are 4BA, 1/4" long.
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ROGER FURNEAUX
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Re: Bolts holding Starter Switch

Post by ROGER FURNEAUX » Wed Jan 15, 2020 3:38 pm

They are indeed 4BA, with slotted hexagon heads. Originally they had little tab washers with an ear bent up to stop them loosening. I know this because I have an unused ST1 switch in its Lucas box, with a little packet of screws & tabs.
The thing about BA is they were not originally British at all, but a Swiss Metric watchmakers thread! Because of this, 0BA, the largest, is exactly the same diameter & pitch as M6.

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SavannahDog
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Re: Bolts holding Starter Switch

Post by SavannahDog » Thu Jan 16, 2020 7:14 am

OK I've bought 2BA bolts and their too big. Maybe my starter is not original but I ordered 2 and 1. Well see when they get here.
Julian Carter
1948 MG TC
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1970 Triumph GT6

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SavannahDog
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Re: Bolts holding Starter Switch

Post by SavannahDog » Tue Jan 21, 2020 12:20 pm

Well My BA 1 and 0 were too big. And this proves it https://en.wikipedia.org/wiki/British_A ... rew_thread

I'll try American sizes.
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ROGER FURNEAUX
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Re: Bolts holding Starter Switch

Post by ROGER FURNEAUX » Wed Jan 22, 2020 12:50 pm

Julian, did you not read my reply on 15th. January? If you canot find them in the States, I have them here in Olde England.

Roger

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SavannahDog
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Re: Bolts holding Starter Switch

Post by SavannahDog » Thu Jan 23, 2020 5:11 am

Roger, Sure could use them. Thought I could buy what I needed. But I'm failing at that.

If you could Please send me 2 two of the screws.

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Julian Carter
1948 MG TC
1952 Chevy Pickup
1967 Triumph TR4A
1970 Triumph GT6

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