HOLO-KROME 12012 3/4"-14 PTF 嵌入式插座壓力塞 | 7/8" 錐形 | 合金鋼熱處理黑色氧化物 (50 個/包)

The hex drive bit fit perfectly, and these plugs sealed the pneumatic port on the first try with no leaks. For the price per plug, the thermal black oxide finish seems durable and consistent across all 50 pieces.

These seated flush in the hydraulic port without needing any extra sealant, which saved me a ton of time on the assembly line. The black oxide finish feels durable and hasn’t marked up my wrenches yet.

The 7/8" taper threads on these plugs engaged smoothly and sealed perfectly on my first try. I was impressed that they sit truly flush with the surface, leaving no annoying gaps. Exactly what I needed for a clean hydraulic port closure.