M3-0.5 X 40mm 內六角螺絲 | 六角驅動 | 部分螺紋 | 316不鏽鋼 (400入/包)

Needed some longer fasteners for a jig I'm building, and the 40mm length on these 316 stainless screws was perfect. The hex socket drive gripped securely without stripping, even at higher torque.

These 316 stainless screws ran through my tapping die without a single bind, and the hex drive held up perfectly under high torque. The partial threading gave me just the right grip depth for mounting brackets on my jig.

I needed corrosion-resistant fasteners for a marine jig, and the 316 stainless steel on these M3 screws fits the bill perfectly. The hex socket drive makes them easy to install with a standard driver, and the partial thread helps them grip without stripping.