HOLO-KROME 32048 #5-40 x 3/4" 杯端內六角止付螺絲 | 合金鋼熱處理黑色氧化 (100 / 包)

The cup point grips the shaft without slipping, and the black oxide finish gives them a clean, uniform look. I’ve used about half the pack on jigs and fixtures, and every one threads in smoothly without any burrs. Exactly what I needed for precise clamping work.

The hex socket drive seated perfectly on my Allen key, and the black oxide finish resists corrosion well. Nice tight threads throughout the whole pack.

The cup point bites into the shaft exactly where you set it, and the hex drive gives you solid purchase without slipping. These are holding firm on a couple of small pulleys I’ve been tinkering with all week.