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UNF countersunk machine screws with a hex recess manufactured from A2 stainless steel that offer a high level of corrosion resistance.

UNF - A2 Stainless Steel Countersunk Socket Screws - ANSI B18.3

Corrosion-resistant countersunk machine screws with a hex socket recess. Available in a range of sizes at great prices. Manufactured from A2 stainless steel, these machine screws offer a high level of resistance to corrosion. This screw has an imperial unified fine thread (UNF) and a countersunk head that will sit flush to the surface of the material. The hex socket allows for easier tightening, increased clamping force, and reduced cam-out.

Conforms to ANSI B18.3 with bulk discounts available.

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  • 10-32 UNF x 1/4" Socket Countersunk Machine Screw A2 Stainless ANSI B18.3

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    £0.45 - £0.45
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    £0.45 - £0.45
    £0.45 ex VAT
    £0.54  incl VAT

  • 10-32 UNF x 5/16" Socket Countersunk Machine Screw A2 Stainless ANSI B18.3

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    £0.25 - £0.25
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    £0.25 ex VAT
    £0.30  incl VAT

  • 10-32 UNF x 3/8" Socket Countersunk Machine Screw A2 Stainless ANSI B18.3

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    £0.32 - £0.32
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    £0.32 - £0.32
    £0.32 ex VAT
    £0.38  incl VAT

  • 10-32 UNF x 7/16" Socket Countersunk Machine Screw A2 Stainless ANSI B18.3

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    £0.27 - £0.27
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    £0.27 - £0.27
    £0.27 ex VAT
    £0.32  incl VAT

  • 10-32 UNF x 1/2" Socket Countersunk Machine Screw A2 Stainless ANSI B18.3

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    £0.12 - £0.53
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    £0.12 - £0.53
    £0.53 ex VAT
    £0.64  incl VAT
    Qty Discounts Available

  • 10-32 UNF x 5/8" Socket Countersunk Machine Screw A2 Stainless ANSI B18.3

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    £0.27 - £0.27
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    £0.27 - £0.27
    £0.27 ex VAT
    £0.32  incl VAT

  • 10-32 UNF x 3/4" Socket Countersunk Machine Screw A2 Stainless ANSI B18.3

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    £0.35 - £0.35
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    £0.35 - £0.35
    £0.35 ex VAT
    £0.42  incl VAT

  • 10-32 UNF x 7/8" Socket Countersunk Machine Screw A2 Stainless ANSI B18.3

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    £0.37 - £0.37
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    £0.37 - £0.37
    £0.37 ex VAT
    £0.44  incl VAT

  • 10-32 UNF x 1" Socket Countersunk Machine Screw A2 Stainless ANSI B18.3

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    £0.45 ex VAT
    £0.54  incl VAT

  • 10-32 UNF x 1 1/4" Socket Countersunk Machine Screw A2 Stainless ANSI B18.3

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    £0.48 - £0.48
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    £0.58  incl VAT

  • 10-32 UNF x 1 1/2" Socket Countersunk Machine Screw A2 Stainless ANSI B18.3

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    £0.60  incl VAT

  • 10-32 UNF x 1 3/4" Socket Countersunk Machine Screw A2 Stainless ANSI B18.3

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    £0.72 - £0.72
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    £0.72 ex VAT
    £0.86  incl VAT

  • 10-32 UNF x 2" Socket Countersunk Machine Screw A2 Stainless ANSI B18.3

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    £0.67 - £0.67
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    £0.80  incl VAT

  • 10-32 UNF x 2 1/2" Socket Countersunk Machine Screw A2 Stainless ANSI B18.3

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    £1.02 - £1.02
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    £1.02 - £1.02
    £1.02 ex VAT
    £1.22  incl VAT

  • 10-32 UNF x 3" Socket Countersunk Machine Screw A2 Stainless ANSI B18.3

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    £1.05 - £1.05
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    £1.05 - £1.05
    £1.05 ex VAT
    £1.26  incl VAT

  • 1/4" UNF x 3/8" Socket Countersunk Machine Screw A2 Stainless ANSI B18.3

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    £0.42 - £0.42
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    £0.42 - £0.42
    £0.42 ex VAT
    £0.50  incl VAT

  • 1/4" UNF x 1/2" Socket Countersunk Machine Screw A2 Stainless ANSI B18.3

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    £0.45 - £0.45
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    £0.45 - £0.45
    £0.45 ex VAT
    £0.54  incl VAT

  • 1/4" UNF x 5/8" Socket Countersunk Machine Screw A2 Stainless ANSI B18.3

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    £0.60  incl VAT

  • 1/4" UNF x 3/4" Socket Countersunk Machine Screw A2 Stainless ANSI B18.3

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    £0.65 - £0.65
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    £0.65 - £0.65
    £0.65 ex VAT
    £0.78  incl VAT

  • 1/4" UNF x 7/8" Socket Countersunk Machine Screw A2 Stainless ANSI B18.3

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    £0.72 - £0.72
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    £0.72 - £0.72
    £0.72 ex VAT
    £0.86  incl VAT

  • 1/4" UNF x 1" Socket Countersunk Machine Screw A2 Stainless ANSI B18.3

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    £0.80 - £0.80
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    £0.80 - £0.80
    £0.80 ex VAT
    £0.96  incl VAT

  • 1/4" UNF x 1 1/4" Socket Countersunk Machine Screw A2 Stainless ANSI B18.3

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    £0.84 - £0.84
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    £0.84 ex VAT
    £1.01  incl VAT

  • 1/4" UNF x 1 1/2" Socket Countersunk Machine Screw A2 Stainless ANSI B18.3

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    £0.94 - £0.94
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    £0.94 ex VAT
    £1.13  incl VAT

  • 1/4" UNF x 1 3/4" Socket Countersunk Machine Screw A2 Stainless ANSI B18.3

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    £1.05 - £1.05
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    £1.26  incl VAT

  • 1/4" UNF x 2" Socket Countersunk Machine Screw A2 Stainless ANSI B18.3

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    £1.15 - £1.15
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    £1.38  incl VAT

  • 1/4" UNF x 2 1/2" Socket Countersunk Machine Screw A2 Stainless ANSI B18.3

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    £2.20 - £2.20
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    £2.64  incl VAT

  • 1/4" UNF x 3" Socket Countersunk Machine Screw A2 Stainless ANSI B18.3

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    £2.65 - £2.65
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    £2.65 - £2.65
    £2.65 ex VAT
    £3.18  incl VAT

  • 5/16" UNF x 5/8" Socket Countersunk Machine Screw A2 Stainless ANSI B18.3

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    £0.81 - £0.81
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    £0.81 - £0.81
    £0.81 ex VAT
    £0.97  incl VAT

  • 5/16" UNF x 3/4" Socket Countersunk Machine Screw A2 Stainless ANSI B18.3

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    £0.92 - £0.92
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    £0.92 - £0.92
    £0.92 ex VAT
    £1.10  incl VAT

  • 5/16" UNF x 7/8" Socket Countersunk Machine Screw A2 Stainless ANSI B18.3

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    £1.02 - £1.02
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    £1.02 - £1.02
    £1.02 ex VAT
    £1.22  incl VAT

  • 5/16" UNF x 1" Socket Countersunk Machine Screw A2 Stainless ANSI B18.3

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    £0.94 - £0.94
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    £0.94 - £0.94
    £0.94 ex VAT
    £1.13  incl VAT

  • 5/16" UNF x 1 1/4" Socket Countersunk Machine Screw A2 Stainless ANSI B18.3

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    £2.25 - £2.25
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    £2.25 - £2.25
    £2.25 ex VAT
    £2.70  incl VAT

  • 5/16" UNF x 1 1/2" Socket Countersunk Machine Screw A2 Stainless ANSI B18.3

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    £2.75 - £2.75
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    £2.75 - £2.75
    £2.75 ex VAT
    £3.30  incl VAT

  • 5/16" UNF x 2" Socket Countersunk Machine Screw A2 Stainless ANSI B18.3

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    £3.25 - £3.25
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    £3.25 - £3.25
    £3.25 ex VAT
    £3.90  incl VAT

  • 5/16" UNF x 2 1/2" Socket Countersunk Machine Screw A2 Stainless ANSI B18.3

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    £3.30 - £3.30
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    £3.30 - £3.30
    £3.30 ex VAT
    £3.96  incl VAT

  • 5/16" UNF x 3" Socket Countersunk Machine Screw A2 Stainless ANSI B18.3

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    £3.75 - £3.75
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    £3.75 - £3.75
    £3.75 ex VAT
    £4.50  incl VAT

  • 3/8" UNF x 3/4" Socket Countersunk Machine Screw A2 Stainless ANSI B18.3

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    £1.25 - £1.25
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    £1.25 - £1.25
    £1.25 ex VAT
    £1.50  incl VAT

  • 3/8" UNF x 1" Socket Countersunk Machine Screw A2 Stainless ANSI B18.3

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    £1.40 - £1.40
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    £1.40 - £1.40
    £1.40 ex VAT
    £1.68  incl VAT

  • 3/8" UNF x 1 1/4" Socket Countersunk Machine Screw A2 Stainless ANSI B18.3

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    £2.05 - £2.05
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    £2.05 - £2.05
    £2.05 ex VAT
    £2.46  incl VAT

  • 3/8" UNF x 1 1/2" Socket Countersunk Machine Screw A2 Stainless ANSI B18.3

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    £1.75 - £1.75
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    £1.75 - £1.75
    £1.75 ex VAT
    £2.10  incl VAT

  • 3/8" UNF x 1 3/4" Socket Countersunk Machine Screw A2 Stainless ANSI B18.3

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    Price Each:
    £2.95 - £2.95
    £2.95 ex VAT
    £2.95 - £2.95
    £2.95 ex VAT
    £3.54  incl VAT

  • 3/8" UNF x 2" Socket Countersunk Machine Screw A2 Stainless ANSI B18.3

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    £3.05 - £3.05
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    £3.05 - £3.05
    £3.05 ex VAT
    £3.66  incl VAT

  • 3/8" UNF x 2 1/2" Socket Countersunk Machine Screw A2 Stainless ANSI B18.3

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    £4.50 - £4.50
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    £4.50 - £4.50
    £4.50 ex VAT
    £5.40  incl VAT

  • 3/8" UNF x 3" Socket Countersunk Machine Screw A2 Stainless ANSI B18.3

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    £6.00 - £6.00
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    £6.00 - £6.00
    £6.00 ex VAT
    £7.20  incl VAT

  • 3/8" UNF x 3 1/2" Socket Countersunk Machine Screw A2 Stainless ANSI B18.3

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    £6.50 - £6.50
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    £6.50 - £6.50
    £6.50 ex VAT
    £7.80  incl VAT

  • 3/8" UNF x 4" Socket Countersunk Machine Screw A2 Stainless ANSI B18.3

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    £6.95 - £6.95
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    £6.95 - £6.95
    £6.95 ex VAT
    £8.34  incl VAT