1/4-20 × 1/4" 소켓 캡 나사 | 로우 헤드 육각 소켓 드라이브 | 합금강 열처리 블랙 옥사이드 (100개/팩)

The thermal black oxide finish on these screws has held up perfectly during my jig assembly work, even with frequent adjustments. The low head profile made them easy to fit into tight spaces where standard cap screws wouldn't work. Very impressed with the consistent thread quality across the whole p

Pulled two out of the bag to test the fit on a fixture I'm building, and the low head profile cleared a tight spot where standard caps would've hit. The black oxide finish looks even and hasn't shown any wear after a dozen assembly cycles. For the price per piece, these are a solid buy for jigs and

The hex socket drive grabs the Allen key cleanly without any slipping, and the black oxide finish gives them a nice uniform look. I’d say the only slight downside is that the low head profile means you need a short ball-end wrench in tight spots, but they fit my jig plate perfectly.