According to the parts catalog, it's part number 4322-01176-20B. 3/8-16 x 1-1/4" Ribbed Neck Carriage Bolt
https://www.pinballlife.com/38-16-x-1-14-ribbed-neck-playfield-support-carriage-bolt.html
If you would prefer not to have the markings on the bolt head, there are two options--refinish the existing bolts (basically, derust, stand, and paint), or search various hardware suppliers. However, most manufacturers these days include the markings to identify the bolt and their specs.
Some folks in the RadCals thread are using elevator bolts to eliminate the visual appearance of these entirely:
Quoted from ForceFlow:According to the parts catalog, it's part number 4322-01176-20B. 3/8-16 x 1-1/4" Ribbed Neck Carriage Bolt
https://www.pinballlife.com/38-16-x-1-14-ribbed-neck-playfield-support-carriage-bolt.html
If you would prefer not to have the markings on the bolt head, there are two options--refinish the existing bolts (basically, derust, stand, and paint), or search various hardware suppliers. However, most manufacturers these days include the markings to identify the bolt and their specs.
I looked at those on PL, but the head didn't look large enough in the first picture. Now that I see the Popeye pin in the second frame they look correct.
Thanks
You can also refresh these by cleaning with wire brush or sanding. Then re blue them. Gun barrel bluing can be found in sporting goods stores.
Quoted from ForceFlow:If you would prefer not to have the markings on the bolt head, there are two options--refinish the existing bolts (basically, derust, stand, and paint), or search various hardware suppliers. However, most manufacturers these days include the markings to identify the bolt and their specs.
You can chuck new bolts in a drill and sand the foundry marks off the heads in a matter of seconds.
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