What size is this?

[bluejonny]

Anyone got any clues as to what size these screws are? A 6mm won't fit and a 7mm too big. Anyone know? They are mostly under the playfield on 80s machine holding lamp sockets in place.

Thanks

 

[Taxiturn]

[Deleted comment for misreading, I assumed you were looking for a socket size to remove / tighten not the actual screw sizes themselves]

 

[Asiapinball]

They will be imperial threads, not metric.

Probably 6-32 https://pinparts.co.uk/pinball-parts/ols/search?keywords=4006-01113&sortOption=descend_by_match
Maybe 8-32 https://pinparts.co.uk/pinball-parts/ols/search?keywords=4008-01113&sortOption=descend_by_match

The differ in length. The length is the length of the thread, NOT including the head.

 

[Asiapinball]

The above links are to "machine screws" which in UK would be called "bolts". I cant tell from the pic whether they are bolts or screws, but If they are screws they will likely be #6 x 3/8" and make sure you don't use screws that are too long on thinner brackets as they will go through the playfield.

The main pinball suppliers do a useful bag of bits tha covers al bases (for screws, at least).

https://www.pinball.co.uk/spares-ac.../nuts-bolts-washers-etc/assorted-bag-of-bits/

Big Bag of Bits 225pc Nut and bolt assortment

225 nuts, bolts, screws, and washers total.� Here's what you get: 10�- #10-32 Black Socket Head Bolts� 10 - High-Collar Lock Washers� 25 - #6 x�3/8" �Unslotted Hex Head Wood Screws� 25 - #6 x�1/2" �Unslotted Hex Head Wood Screws 5 -�#8 x 1/2"�Unslotted Hex Head Wood Screws 25 - #6-32 Nylon...

pinparts.co.uk

 

[Asiapinball]

As @Taxiturn states 1/4" head.

 

[Asiapinball]

[Deleted comment for misreading, I assumed you were looking for a socket size to remove / tighten not the actual screw sizes themselves]

I think he was and it is 1/4 inch head. I thought he meant what are the screws hence my answer. I think you got it correct first time but I will my answer up just in case

 

[Taxiturn]

I think he was and it is 1/4 inch head. I thought he meant what are the screws hence my answer. I think you got it correct first time but I will my answer up just in case

Fingers crossed that between the two of us we’ve got the right answer haha

 

[Asiapinball]

On average we are probably correct. Time for sleep. HMRC keeping you awake?

 

[bluejonny]

Thanks everyone for the replies. I had a big clear out and I think I threw away a bag that had my only socket that fitted these.

 

[Epotech]

8/32 sheet metal screws

 

[kev a]

If it is 1/4 inch, you could use a multi screwdriver (the ones that accept all the little hex bit attachments) if you have one.