Store +3 1/4 x 1/2 Grade 12.9 UNC Socket Cap Screws ANSI B18.3 Pack of 200 SKU 912-UNF-004005 £7.88 In stock Quantity: 1 Add to Bag Product Details Type: Socket Screws Head Style: Cap Head Drive Style: Socket (Allen Key) Diameter: 1/4 unc Length: 1/2 inch Tensile Stength: 12.9 Units in product: Pack of 25 Socket allen cap head bolts and screws. Grade 12.9 imperial thread. Save this product for later Favorite