Autoplunger Arm Weld Assembly used in many, but not all, Stern pinball machines.
Also used on the American Pinball machines listed below.
Choose plunger length from drop-down menu below.  Refer to the game list below.

This assembly consists of the following parts:
(1) 515-6526-00 arm weld assembly
(1) 535-7697-00 autoplunger fulcrum
(2) 545-5423-00 1/4" nyliners
(1) 515-5338-00 OR (1) 515-5183-00 plunger and link assembly
(1) 266-5020-00 compression spring
(2) 270-5002-00 retaining ring e-clips 

Stern machines using plunger and link 515-5338-00:
Striker Xtreme
Sharkey's Shootout
HIgh Roller Casino
Austin Powers
Monopoly
Playboy
RollerCoaster Tycoon
The Simpsons Pinball Party
Terminator 3
The Lord of the Rings
The Lord of the Rings Gold
Ripley's Believe It or Not
Elvis
Elvis Gold
The Sopranos
NASCAR
Grand Prix
World Poker Tour
Pirates of the Caribbean

Stern machines using plunger and link 515-5183-00:
Family Guy
Spider-Man
Black Spider-Man
Wheel of Fortune
Indiana Jones
Batman The Dark Knight
CSI
NBA
24
Iron Man
Big Buck Hunter
Avatar (all models)
Tron (all models)
The Rolling Stones (all models)
Transformers (all models)
AC/DC (all models)
The Avengers (all models)
X-Men (all models)
Metallica (all models)

Data East/Sega/Stern #500-6091-00.

American Pinball machines using plunger and link 515-5338-00 (AP assembly #BASM0019-00):
Houdini
Oktoberfest
Hot Wheels