Trailer Brake Shoe Hold Down Pin, P/N 11686273. NSN 5305-01-079-1494. Mil-Spec. AATR Shank Length 1.978 inches nominal AAZE Shank Diameter 0.1350 inches nominal ABQW Head Length 0.3900 inches nominal MATT Material Steel comp 1020 overall MDCL Material Document and Classification QQ-W-405 fed spec single material response overall STYL Style Designator Headed 14461 WRD3