Pinball Flasher Socket Receptacle.

Used in many Williams/Bally ramps and plastics.

Socket and receptical is normally riveted into place but can also be screwed.

Used in the following games:

Attack from Mars

Cactus Canyon

Champion Pub

Cirqus Voltaire

Corvette,

Dirty Harry

Demo Man

Funhouse

Gilligan's Island

Hurricane

Indy 500

Johnny Mnemonic

Junk Yard

Monster Bash

Medieval Madness

NBA Fastbreak

No Good Gofers

Popeye

Road Show

Safecracker

Star Wars: Episode 1

The Addams Family

The Addams Family Gold

Twilight Zone

Theatre of Magic

Tales of the Arabian Nights

World Cup Soccer

Who Dunnit

Williams/Bally reference #A-14265-13.