HOLO-KROME 60136 1/2-13 x 2-1/4" 內六角螺絲 | 平頭內六角驅動 | 合金鋼 熱處理黑色氧化 (25 / 包)

I needed some heavy-duty bolts for a jig I was building, and these flat head screws sit perfectly flush without any wobble. The black oxide finish looks professional and seems durable enough for repeated use in my shop fixtures.

The black oxide finish on these screws looks sharp and held up well during assembly of my jig. Fit was snug in the 1/2-13 tap, and the flat head sits flush like it should.

The threads cut cleanly into my steel plate without any binding, and the black oxide finish gives them a nice uniform look that resists fingerprints during assembly. These are holding up great on the jig I use daily, so I grabbed another pack for spare tooling.