#262 HO Scale Whisker® Coupler Narrow Snap-Together Gearboxes & Lids
Narrow Low Profile Snap-together Gearbox for Whisker® Couplers.
(except #143, #144, #145 Short Standard Head Whisker® Couplers.)
Package includes: 10 pairs.
2-56 screws are the most commonly used for center hole.
Screw length will very depending on the mounting situation.