1/4-20 x 2-1/8" 機械螺絲 | 平頭一字槽 | 普通鋼 (400/包)

I needed a full 2-1/8" length for a jig I'm building, and these threaded in cleanly with no binding. The slotted drive is old-school but works perfectly with a standard flathead screwdriver.

The flat head sits perfectly flush in my counterbore, and a slotted driver grabs the slot without slipping. Got exactly 400 for the price of a handful at the hardware store, which makes this a solid stock-up for indoor projects.

Packed 400 of these 1/4-20 x 2-1/8" machine screws in one box, which saved me a trip to the hardware store. The slotted drive on the flat head worked fine with a standard screwdriver for assembling some wooden jigs. Good value for a big batch of plain steel fasteners that don't need to be outdoors.