Kadee HO Scale: Kadee #37 Plastic Couplers w/ Gearboxes

(2) Pair #37 Plastic Shank Couplers - Medium Underset Shank
(2) Pair #621 Torsion Centering Spring
(2) Pair #233 Gearboxes & Lids
(2) Pair #210 Washers
(2) Pair #256 - 2-56 Screws
(2) #622 Knuckle Springs

#37 Plastic Coupler Features:
Material   - Metal Knuckle, Plastic Coupler Shank
Shank Length   - Medium (9/32") (center hole to back of coupler head)
Coupler Offset   - Underset
Knuckle Spring   - #622
Centering System   - Standard Shank
Centering Spring   -
#621 Torsion Centering Spring
Head   - Standard Head
Works With   - #233 draft gearboxes

#233 Plastic Draft Gearboxes & Lids Features:
Material   - Insulated Plastic
Dimensions   - 3/8"L x 5/16"W x 9/64"H
Works With   - NO.5®, #58, 20-Series Couplers

#37 in a #233 monted on top. Mounting Specifications:
Mounting Height   - 29/64"
Centerline   - 25/64"
Trip Pin Height   - 1/32"
Center Hole   - 2-56 Insulated Screws are the most commonly used. (Screw length will vary)

#37 in a #233 monted on bottom. Mounting Specifications:
Mounting Height   - 13/32"
Centerline   - 25/64"
Trip Pin Height   - 1/32"
Center Hole   - 2-56 Insulated Screws are the most commonly used. (Screw length will vary)