10-pack of closed-end 1/4"-20 natural nylon thumb nuts. Knurled and slotted. Threads 0.250" deep. 0.380" high. Screwdriver slot 0.08" wide. Knurls 0.492" diameter. 

Made in USA. New, old stock.  

Shipping: See calculator tab above. In US, pay shipping only on the first 10-pack, all others bought at the same time ship free. You may need to request an invoice (after clicking buy-it-now) to get this deal.

Thanks, Rick