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UNF Socket Cap Screws. UNF socket cap screws. 10"UNF - 32tpi, allen key size 5/32". Threads are Unified National Fine (UNF). 1/4"UNF - 28tpi, allen key size 3/16". 5/16"UNF - 24tpi, allen key size 1/4".
When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.