HO Parts Miniature Hardware 2-56 Freight Car Truck Screw Assortment 600 Screws Item is one assortment of small screws of the type commonly used on Athearn and other HO scale model trains, particularly for attaching trucks and coupler boxes. This lot contains 100 each of 6 common sizes. . Includes more than 100 each of: . 2-56 x 1/8 pan head - useful for coupler box lids on Roundhouse, Bowser and Walthers cars. . 2-56 x 3/16 round head - Replaces plastic truck pin on most Accurail cars. . 2-56 x 1/4 round head - Fits Athearn flat cars, gondolas, boxcars and reefers. . 2-56 x 3/8 pan head - Fits Athearn covered hoppers and passenger cars. . #2 x 3/8 round head - Self tapping screw, useful when threads are stripped. . 2-56 x 1/2 pan head - Fits Athearn open hopper cars. .