1/2-20 × 2-1/2" 六角頭螺絲 | 美國製造 | L9級合金鋼黃鋅 | 部分螺紋 (50/包)

Put these on a skid-steer attachment bracket where I needed the extra tensile strength of L9. The threading is nice and clean, and the yellow zinc gives a good corrosion barrier. Packed fifty to a box with no damaged threads.

Used these to bolt down a jig table in my shop and the yellow zinc finish still looks brand new after months of oil and grime. The partial threads grabbed deep enough that I didn't need extra washers on the frame. Solid grip with a socket, no stripping at the corners.

Threads were clean and consistent, held up fine torquing to spec on a press. Only wish they came in a full-thread option, but the partial thread gives plenty of grip on thicker flanges.