Williams/Bally metal post with #10-32 thread.
Used on the following games:
Attack From Mars
Bram STokers Dracula
Cactus Canyon
Champion Pub
Cirqus Voltaire
Dirty Harry
Demolition Man
Doctor Who
Fish Tales
Indy 500
Jackbot
Johnny Mnemonic
Junkyard
Monster Bash
Medieval Madness
NBA Fastbreak
No Fear
No Good Gofers
Popeye
Revenge From Mars
Roadshow
Safecracker
Scared Stiff
Shadow
Twilight Zone
Theatre of Magic
Tales of the Arabian Nights
World Cup Soccer
Who Dunnit
May not be a complete list!
Williams/Bally reference number 03-4660.