غسالات قفل أسنان خارجية 5/16 | فولاذ مقاوم للصدأ 410 (150 / عبوة)

The teeth bit into the bolt head immediately when I torqued it down—no spinning or sliding at all. The 410 stainless feels solid and held up fine under the constant vibration on my workshop gear.

Vibration on my milling machine kept loosening the same fastener every shift, so I swapped in these 410 stainless washers and it’s held rock solid for two weeks now. The external teeth really bite into the surface, and the pack of 150 gives me plenty of spares for other jobs.

The 410 stainless steel feels plenty sturdy for my vibration-heavy setup, and each washer in the pack has clean, consistent teeth that bite into the fastener well. I went through maybe twenty so far on a small engine mount and none have deformed or slipped, which is exactly what I needed for the pri