براغي مقبس سداخلية بنقطة كأس 1/4-20 × 5/16 بوصة | فولاذ مقاوم للصدأ 316 (80/عبوة)

Had to swap out some zinc set screws on a marine shaft collar, and these 316 stainless ones are holding up perfectly without a hint of rust. The cup point bites into the shaft nicely, and the hex socket makes installation a breeze with a standard allen key.

Got the 316 stainless ones for a pulley setup on a saltwater boat, and they’ve held up perfectly through a full season without a hint of rust. The socket drive is easy to seat even in tight spots, and the cup point grips the shaft like it’s supposed to.

The cup point bites into the shaft nicely, and the 316 stainless gives me zero worry about rust in a damp shop. I used a dozen on a pulley setup and they cinched down tight without stripping.