Hex Washer Zip-In Screw (1000pg) - Malco which features larger inlet and

which features larger inlet and outlet sizes for higher flow capacity

Connections: It features a 1/4" Male Pipe Thread (MPT) connection at the bottom and a 1/4" Female Pipe Thread (FPT) connection on the side

Hex Bolsters: Accept a wrench for extra turning power on stubborn fasteners

making it easy to handle and operate

This brush is ideal for cleaning flues and boilers where deposits are medium

Hex Washer Zip-In Screw (1000pg) - Malco which features larger inlet andThe Malco HW7X1 2ZT is a #7 x 1 2" Hex Washer Zip In Screw, packaged in a 1000 count tub. Here's a detailed overview: Product Details: HW7X1 2ZT Screw Size: #7 Length: 1 2 inch Head Style: 1 4" Slotted Hex Washer Head Finish: Bright Zinc Plated Drive Type: Slotted Hex Point Type: Ultra sharp tapered self piercing point Thread Design: Combination lead double thread Material: Steel Packaging: 1000 screws per tub