Acorn SW-MW1LG250 Metal Building Screw, 1" Linesman Double race ball bearing construction

Double race ball bearing construction with black soft tread wheel for both carpets and hard surface floors

Lightweight (36 lbs

Resist alcohol and household chemicals

Aluminum Screen Frames

right facing stop

Acorn SW-MW1LG250 Metal Building Screw, 1" Linesman Double race ball bearing construction#9 15 metal to wood screws are sealing self piercing tapping screws made from heat treated C1022 steel, case hardened for roofing and siding applications. A 1 4" across flats high hat hex washer head with assembled EPDM washer offers easy driving and conforms to the metal surface for a secure and long lasting seal. The twin lead type 17 point and hi lo threads offer faster drive time and greater resistance to pullout. All screws are 1,000 hour salt