4-Pack HP 0370-0603 Replacement Power Switch Buttons – 3457A 3468A 3478A

4-pack of replacement power switch pushbuttons for vintage Hewlett-Packard test instruments that use HP part number 0370-0603. Each button is designed to snap over the original square switch shaft and clip into place. Printed in black PETG to provide the flexibility needed for the snap-fit interface. Known applications include the HP 3457A, 3468A, and 3478A, with the same 0370-0603 part number also used in several other vintage HP instruments. Approximate size per button: 6 × 6 × 10.75 mm. Includes 4 replacement buttons. Please verify that your instrument uses HP part number 0370-0603 before ordering. This is an aftermarket replacement part and is not manufactured by or affiliated with HP, Hewlett-Packard, or Keysight.