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UNC - countersunk machine screws with a hex socket recess. A screw with a counter sunk head allowing for a flush finish to the material.

UNC - Self-Colour Countersunk Socket Screws - ANSI B18.3

UNC, countersunk machine screws with a hex socket recess are available in various sizes at great prices. Manufactured from grade 10.9 steel with a black-oxide coating and an imperial unified coarse thread (UNC). The hex socket allows higher torque and higher clamping force with reduced cam-out. Best used with a pre-drilled countersink, with the countersunk head allowing for a flush finish to the surface if needed.

Conforms to ANSI B18.3 with a range of bulk discounts available.

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  • 1/2" UNC x 3/4" Socket Countersunk Machine Screw Self Colour ANSI B18.3

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    Price Each:
    £0.47 - £1.03
    £1.03 ex VAT
    £0.47 - £1.03
    £1.03 ex VAT
    £1.24  incl VAT
    Qty Discounts Available

  • 1/2" UNC x 1" Socket Countersunk Machine Screw Self Colour ANSI B18.3

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    Price Each:
    £0.28 - £0.63
    £0.63 ex VAT
    £0.28 - £0.63
    £0.63 ex VAT
    £0.76  incl VAT
    Qty Discounts Available

  • 1/2" UNC x 1 1/4" Socket Countersunk Machine Screw Self Colour ANSI B18.3

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    Price Each:
    £0.37 - £0.77
    £0.77 ex VAT
    £0.37 - £0.77
    £0.77 ex VAT
    £0.92  incl VAT
    Qty Discounts Available

  • 1/2" UNC x 1 1/2" Socket Countersunk Machine Screw Self Colour ANSI B18.3

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    Price Each:
    £0.52 - £1.02
    £1.02 ex VAT
    £0.52 - £1.02
    £1.02 ex VAT
    £1.22  incl VAT
    Qty Discounts Available

  • 1/2" UNC x 1 3/4" Socket Countersunk Machine Screw Self Colour ANSI B18.3

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    Price Each:
    £0.50 - £0.99
    £0.99 ex VAT
    £0.50 - £0.99
    £0.99 ex VAT
    £1.19  incl VAT
    Qty Discounts Available

  • 1/2" UNC x 2 1/4" Socket Countersunk Machine Screw Self Colour ANSI B18.3

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    Price Each:
    £0.43 - £0.87
    £0.87 ex VAT
    £0.43 - £0.87
    £0.87 ex VAT
    £1.04  incl VAT
    Qty Discounts Available

  • 1/2" UNC x 2 1/2" Socket Countersunk Machine Screw Self Colour ANSI B18.3

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    Price Each:
    £0.60 - £1.15
    £1.15 ex VAT
    £0.60 - £1.15
    £1.15 ex VAT
    £1.38  incl VAT
    Qty Discounts Available

  • 1/2" UNC x 3" Socket Countersunk Machine Screw Self Colour ANSI B18.3

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    Price Each:
    £0.63 - £1.19
    £1.19 ex VAT
    £0.63 - £1.19
    £1.19 ex VAT
    £1.43  incl VAT
    Qty Discounts Available

  • 1/2" UNC x 3 1/2" Socket Countersunk Machine Screw Self Colour ANSI B18.3

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    Price Each:
    £1.42 - £2.46
    £2.46 ex VAT
    £1.42 - £2.46
    £2.46 ex VAT
    £2.95  incl VAT
    Qty Discounts Available

  • 1/2" UNC x 4" Socket Countersunk Machine Screw Self Colour ANSI B18.3

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    Price Each:
    £1.24 - £2.17
    £2.17 ex VAT
    £1.24 - £2.17
    £2.17 ex VAT
    £2.60  incl VAT
    Qty Discounts Available

  • 1/2" UNC x 5" Socket Countersunk Machine Screw Self Colour ANSI B18.3

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    Price Each:
    £1.66 - £2.83
    £2.83 ex VAT
    £1.66 - £2.83
    £2.83 ex VAT
    £3.40  incl VAT
    Qty Discounts Available

  • 1/2" UNC x 6" Socket Countersunk Machine Screw Self Colour ANSI B18.3

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    Price Each:
    £2.46 - £4.12
    £4.12 ex VAT
    £2.46 - £4.12
    £4.12 ex VAT
    £4.94  incl VAT
    Qty Discounts Available

  • 1/2" UNC x 7" Socket Countersunk Machine Screw Self Colour ANSI B18.3

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    Price Each:
    £5.48 - £8.95
    £8.95 ex VAT
    £5.48 - £8.95
    £8.95 ex VAT
    £10.74  incl VAT
    Qty Discounts Available