HOLO-KROME 86027 M6-1 x 10mm 內六角圓頭螺絲 | 鈕扣頭六角驅動 | 合金鋼熱處理黑色氧化（100個/包）

I was pleasantly surprised by how cleanly these button head screws seat into countersunk holes—the hex drive bites perfectly with no stripping. They’ve held up great in a small jig I’m building, and the black oxide finish looks sharp against the steel.

The black oxide finish on these M6 button heads looks sharp and held up fine during assembly of a small jig. Threads cut clean into aluminum without any binding, and the hex socket seated the driver snugly every time.

Finally, a button head screw that actually fits a 3mm hex key without stripping. These are perfect for my jig build and the black oxide finish looks clean.