M5-0.8 X 130mm 內六角螺栓 | 六角驅動 | 部分螺紋 | 12.9級合金鋼 熱處理黑氧化物 (每包100個)

Needed a 130mm length for a deep jig assembly and these fit perfectly. The hex socket drive engaged cleanly without stripping, and the black oxide finish seems durable.

The black oxide finish on these M5s is exactly what I needed for a jig build—no glare under the work lights, and they thread cleanly into the fixture. The 100-count box is generous for prototyping, and the 12.9 alloy steel feels reassuringly solid compared to the 8.8s I've used before.

The hex socket drive seated perfectly with my Allen key, no rounding or stripping even at full torque. The thermal black oxide finish feels smooth and the 12.9 alloy steel is clearly built for heavy jig work, not cheap hardware.