Flange nuts have a washer-like base to distribute pressure over a greater surface area and ensure the fastener stay tight.
They are commonly used to help lock a bolt in place without the need to use a washer and a nut.
Flange Lock Nuts
1/4" nut with built in flange lock washer. Can be used for use in sign installation.
Flange Lock Nuts Details
Flange Lock Nuts Reviews
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