3/8-24 X 1-1/4" 滾花杯端內六角止付螺絲 | 合金鋼 (100個/包)

The knurled cup point on these set screws really digs in and holds tight, I used them to secure a collar on a shaft. The hex socket drive made installation in a cramped spot much easier than a standard slot would have.

The knurled cup point really bites into the shaft without marring it, which is exactly what I needed for a locking application. All 100 pieces arrived clean and the hex sockets were crisp, no stripped corners on the first few I’ve torqued down.

I needed some hardware for a custom jig, and the knurled cup point on these screws gives them a really secure grip when tightened. They fit my hex driver perfectly and the alloy steel feels solid. Exactly the quality I expect for the price.