1-8 X 3-1/2" 內六角螺絲 | 六角驅動 | 尼龍塗層 | 部分螺紋 | 合金鋼熱處理黑氧化物 (10顆/包)

These 3.5-inch socket cap screws have the perfect length for pulling together thick jig plates. I was impressed by the hex socket drive, which made installation easy without stripping. The black oxide finish gives them a clean, professional appearance.

The partial threads grabbed perfectly when I set these in my jig base—no slipping at all. The nylon patch held them snug during a full day of machining, and the black oxide finish looks sharp on the tooling.

The black oxide finish took the torque I threw at them on my jig build without a hint of galling, and the nylon patch held them snug through a full day of vibration. Exactly what I needed for the precision assembly.