Simpson #12 x 2-1/2" Self-Drilling Hex-Washer Head Screw, 305 Stainless Steel WSHL Subfloor Screw (Collated) They also help ensure that

They also help ensure that joints are consistently straight and strong

Face-mount joist-to-beam or joist-to-header connections

Bearing Guide Ball-bearing pilot self-guides along the workpiece edge

Self-lubricating bearings reduce maintenance requirements and extend the working life of the machine

What type of lubrication system is used on this mill

Simpson #12 x 2-1/2" Self-Drilling Hex-Washer Head Screw, 305 Stainless Steel WSHL Subfloor Screw (Collated) They also help ensure thatModel No. S12250HDU Coating Material. Type 305 Stainless Steel Screw size. #12 Drive Type. 5 16 in. Hex Length (in.) 2 1 2 Thread Type. Tapping Threads Head Type. Hex Washer Head TPI. 14 Point Type. Drill Point Use this Stainless Steel Self Drilling Hex Washer Head Screw for fastening aluminum and fiberglass (but not for steel). Applications Aluminum and fiberglass fastening (not steel) Key Features Indented hex washer head Tapping screw thread #3