1/4" x 1" BSW Setscrew Hex BS193:1929 in EN1A mild steel. Thicker hex head than modern fasterners but with the same width.Full bearing,Single chamfer.TPI: 261/4" x 1" BSW Setscrew Hex BS193:1929£2.18PriceFinish*SelectDiameter*SelectLength*SelectGrade*SelectQuantity*Add to CartDeliveryDelivery costs are based on the weight of your order UK Delivery: 3 to 5 business days International: 5 to 7 business days