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1/4" x 3/4" BSF Brass Countersunk Machine Screw BS450:1933
1/4" x 3/4" BSF Machine Screw Countersunk (CSK) Slotted BS450:1933 in CZ121 Brass.
Countersunk Angle: 45 degrees, TPI: 26
These have a shallower and a smaller diameter head than the modern equivalent. A modern machine screw in a Pre-WWII countersunk hole will sit higher. Filing a modern head down reduces the depth of the screwdriver slot making it easier to damage the sides of the slot when screwing or unscrewing.

1/4" x 3/4" BSF Machine Screw Countersunk Slotted Brass BS450:1933

£2.31Price

  • Delivery costs are based on the weight of your order

    • UK Delivery: 3 to 5 business days
    • International: 5 to 7 business days
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