GRK 12225 Handy-Pak Rugged Structural Screw, 5/16" x 4" SummerEndSale Transformers are marked NEMA Type

Transformers are marked NEMA Type D enclosure

Factory rubber gasket for tight seal

Superior kink resistance

Such as air conditioning

Use on homes and buildings to keep out elements and to protect wood against water damage

GRK 12225 Handy-Pak Rugged Structural Screw, 5/16" x 4" SummerEndSale Transformers are marked NEMA TypeGRK Rugged Structural Screw is made of specially hardened steel to provide you with high tensile, torque and shear strength. The sharp threads and points bite instantly into the material (including hardwood), reducing the splitting effect due to smaller shanks. RSS screw which is 3 1 8" and longer have CEE thread that enlarges the screw hole for the non threaded portion of the fastener, allowing the wood to settle easily and increasing the screws