غسالات قفل متوسطة مشقوقة 9/16 بوصة | فولاذ مطلي بالزنك الأسود (100/عبوة)

The black zinc finish on these #9 washers really holds up—installed a set on my trailer hitch and they haven't budged after a month of gravel roads. Perfect for keeping bolts snug under constant vibration.

I needed a reliable way to keep my mower deck bolts from loosening, and these washers' black zinc finish seems tough enough to handle the moisture and vibration. The split in each one grabbed the fastener threads securely during installation, which gave me confidence they'll stay put.

These washers fit perfectly on my project and the black zinc finish looks great against the dark hardware. They held tight even after I tested them with a power tool running for a few minutes, no loosening at all.