M6-1 x 45mm 圓柱頭六角承螺絲 | 六角驅動 | 部分螺紋 | 10.9級合金鋼熱處理黑氧化物 (300入/包)

I needed a batch of M6 socket cap screws for a jig I’ve been machining, and the 45mm length with the partial thread gave me just the right grip depth without wasting space. The hex socket drive feels precise and clean, and the black oxide finish looks durable out of the box.

The partially threaded design is exactly what I needed for my jig setup, and the hex socket drive seats perfectly with no wobble. All 300 pieces arrived clean and the black oxide finish looks consistent across the lot — they’ve held up well under repeated torque in my tooling builds.

The hex socket drive fits my Allen key perfectly, so installing these into a jig fixture was straightforward. The black oxide finish seems like it will resist shop grime well. My only minor gripe is that the threading could start a bit closer to the head for tighter spots.