M12-1.25 x 65mm 內六角螺絲 | 六角驅動 | 部分螺紋 | 等級12.9 合金鋼 熱處理黑色氧化物 (50個/包)

Thread pitch is exactly 1.25 as listed, and the black oxide finish has a nice even look that doesn't flake off when I’m tightening them into my fixture plates. They seat cleanly with a hex key, no rounded corners on the drive.

Finally torqued them down to spec on a jig I'm building — the Class 12.9 rating gives me real confidence they won't let go under heavy load. The hex socket seated perfectly with no stripping, and the black oxide finish looks clean and resists oil nicely.

Threading these into a custom tooling fixture was a breeze—the hex socket drive gripped perfectly without any cam-out. The thermal black oxide finish has a nice, uniform look and feels tougher than standard black oxide I've used before. These 65mm screws gave me just the right length for a deep clam