Technical Bulletin
Bulletin No.: PRO-06-02 Effective Date: 4/15/81 Page: 1 of 1
Subject: PH-2 Air Horns
In early 1979 the threads on air horn bells were changed from a ¾”-28 Thread (fine) to a
¾”-10 Thread (coarse).
For service requirements, both the fine and coarse thread bells are available. Piece
numbers are listed below. Please note on catalog page 06-A-1.
¾” – 28 ¾” – 10
Fine Thread Coarse Thread
Long Bell (Chrome) 212678 293515
Long Bell (Unpainted) 239792 293516
Short Bell (Chrome) 212679 293518
Short Bell (Unpainted) 239793 293519