Socket Screws - Countersunk - UNC

A countersunk head is usually used when no part of the fastener head is required to be protruding above the level of the substrate. Countersunk heads can also be recessed and filled over if a hidden fixing is required. Usually abbreviated to CSK.

UNC (Unified National Coarse)

UNC stands for Unified National Coarse. It is a common imperial thread type with less threads per axial distance than its UNF equivalent.

Unified thread types (UNF and UNC) were introduced at the beginning of World War 2 to enable the interchangeability of machinery manufacturing between the USA, Canada and Great Britain. Still commonly found on a vast array of old machines and vehicles in the UK, UNF and UNC threads continue to be the standard thread in the USA and Canada.

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29 Items

Code Product Name Info Pack Size Price Qty
1/4 SKUCA2025050 1/4" UNC x 1/2" - Socket Screw Countersunk - A2 Stainless Steel - Pack of 10
10
£27.50 £33.00
1/4 SKUCA2025050
1/4" UNC x 1/2" - Socket Screw Countersunk - A2 Stainless Steel - Pack of 10
10
£27.50 £33.00
1/4 SKUCA2025100 1/4" UNC x 1" - Socket Screw Countersunk - A2 Stainless Steel - Pack of 5
5
£13.75 £16.50
1/4 SKUCA2025100
1/4" UNC x 1" - Socket Screw Countersunk - A2 Stainless Steel - Pack of 5
5
£13.75 £16.50
No4 UNC x 1/4 SKUCSC0040025 No4 UNC x 1/4" - Socket Screw Countersunk BS 2470 - Self Colour - Pack of 200
200
£13.50 £16.20
No4 UNC x 1/4 SKUCSC0040025
No4 UNC x 1/4" - Socket Screw Countersunk BS 2470 - Self Colour - Pack of 200
200
£13.50 £16.20
No4 UNC x 1/4 SKUCSC0040025400 No4 UNC x 1/4" - Socket Screw Countersunk BS 2470 - Self Colour - Pack of 400
400
£25.13 £30.16
No4 UNC x 1/4 SKUCSC0040025400
No4 UNC x 1/4" - Socket Screw Countersunk BS 2470 - Self Colour - Pack of 400
400
£25.13 £30.16
No4 UNC x 1/4 SKUCSC0040037 No4 UNC x 3/8" - Socket Screw Countersunk BS 2470 - Self Colour - Pack of 25
25
£17.10 £20.52
No4 UNC x 1/4 SKUCSC0040037
No4 UNC x 3/8" - Socket Screw Countersunk BS 2470 - Self Colour - Pack of 25
25
£17.10 £20.52
No4 UNC x 1/4 SKUCSC0040075 No4 UNC x 3/4" - Socket Screw Countersunk BS 2470 - Self Colour - Pack of 50
50
£16.38 £19.66
No4 UNC x 1/4 SKUCSC0040075
No4 UNC x 3/4" - Socket Screw Countersunk BS 2470 - Self Colour - Pack of 50
50
£16.38 £19.66
No4 UNC x 1/4 SKUCSC0040075400 No4 UNC x 3/4" - Socket Screw Countersunk BS 2470 - Self Colour - Pack of 400
400
£65.50 £78.60
No4 UNC x 1/4 SKUCSC0040075400
No4 UNC x 3/4" - Socket Screw Countersunk BS 2470 - Self Colour - Pack of 400
400
£65.50 £78.60
No4 UNC x 1/4 SKUCSC0080037 No8 UNC x 3/8" - Socket Screw Countersunk BS 2470 - Self Colour - Pack of 50
50
£10.00 £12.00
No4 UNC x 1/4 SKUCSC0080037
No8 UNC x 3/8" - Socket Screw Countersunk BS 2470 - Self Colour - Pack of 50
50
£10.00 £12.00
No4 UNC x 1/4 SKUCSC0080037400 No8 UNC x 3/8" - Socket Screw Countersunk BS 2470 - Self Colour - Pack of 400
400
£24.91 £29.89
No4 UNC x 1/4 SKUCSC0080037400
No8 UNC x 3/8" - Socket Screw Countersunk BS 2470 - Self Colour - Pack of 400
400
£24.91 £29.89
No4 UNC x 1/4 SKUCSC0080100 No8 UNC x 1" - Socket Screw Countersunk BS 2470 - Self Colour - Pack of 50
50
£12.33 £14.80
No4 UNC x 1/4 SKUCSC0080100
No8 UNC x 1" - Socket Screw Countersunk BS 2470 - Self Colour - Pack of 50
50
£12.33 £14.80
No4 UNC x 1/4 SKUCSC0080100200 No8 UNC x 1" - Socket Screw Countersunk BS 2470 - Self Colour - Pack of 400
200
£21.08 £25.30
No4 UNC x 1/4 SKUCSC0080100200
No8 UNC x 1" - Socket Screw Countersunk BS 2470 - Self Colour - Pack of 400
200
£21.08 £25.30
No4 UNC x 1/4 SKUCSC0100037 No10 UNC x 3/8" - Socket Screw Countersunk BS 2470 - Self Colour - Pack of 100
100
£10.29 £12.35
No4 UNC x 1/4 SKUCSC0100037
No10 UNC x 3/8" - Socket Screw Countersunk BS 2470 - Self Colour - Pack of 100
100
£10.29 £12.35
No4 UNC x 1/4 SKUCSC0100037400 No10 UNC x 3/8" - Socket Screw Countersunk BS 2470 - Self Colour - Pack of 400
400
£20.59 £24.71
No4 UNC x 1/4 SKUCSC0100037400
No10 UNC x 3/8" - Socket Screw Countersunk BS 2470 - Self Colour - Pack of 400
400
£20.59 £24.71
No4 UNC x 1/4 SKUCSC0250037 1/4" UNC x 3/8" - Socket Screw Countersunk BS 2470 - Self Colour - Pack of 100
100
£10.43 £12.52
No4 UNC x 1/4 SKUCSC0250037
1/4" UNC x 3/8" - Socket Screw Countersunk BS 2470 - Self Colour - Pack of 100
100
£10.43 £12.52
No4 UNC x 1/4 SKUCSC0250037200 1/4" UNC x 3/8" - Socket Screw Countersunk BS 2470 - Self Colour - Pack of 200
200
£13.90 £16.68
No4 UNC x 1/4 SKUCSC0250037200
1/4" UNC x 3/8" - Socket Screw Countersunk BS 2470 - Self Colour - Pack of 200
200
£13.90 £16.68
No4 UNC x 1/4 SKUCSC0250050 1/4" UNC x 1/2" - Socket Screw Countersunk BS 2470 - Self Colour - Pack of 25
25
£16.23 £19.48
No4 UNC x 1/4 SKUCSC0250050
1/4" UNC x 1/2" - Socket Screw Countersunk BS 2470 - Self Colour - Pack of 25
25
£16.23 £19.48
No4 UNC x 1/4 SKUCSC0250175 1/4" UNC x 1 3/4" - Socket Screw Countersunk BS 2470 - Self Colour - Pack of 100
100
£20.31 £24.37
No4 UNC x 1/4 SKUCSC0250175
1/4" UNC x 1 3/4" - Socket Screw Countersunk BS 2470 - Self Colour - Pack of 100
100
£20.31 £24.37
No4 UNC x 1/4 SKUCSC0310050 5/16" UNC x 1/2" - Socket Screw Countersunk BS 2470 - Self Colour - Pack of 50
50
£15.90 £19.08
No4 UNC x 1/4 SKUCSC0310050
5/16" UNC x 1/2" - Socket Screw Countersunk BS 2470 - Self Colour - Pack of 50
50
£15.90 £19.08
No4 UNC x 1/4 SKUCSC0310050200 5/16" UNC x 1/2" - Socket Screw Countersunk BS 2470 - Self Colour - Pack of 200
200
£21.20 £25.44
No4 UNC x 1/4 SKUCSC0310050200
5/16" UNC x 1/2" - Socket Screw Countersunk BS 2470 - Self Colour - Pack of 200
200
£21.20 £25.44
No4 UNC x 1/4 SKUCSC0310150 5/16" UNC x 1 1/2" - Socket Screw Countersunk BS 2470 - Self Colour - Pack of 50
50
£30.26 £36.31
No4 UNC x 1/4 SKUCSC0310150
5/16" UNC x 1 1/2" - Socket Screw Countersunk BS 2470 - Self Colour - Pack of 50
50
£30.26 £36.31
No4 UNC x 1/4 SKUCSC0310200 5/16" UNC x 2" - Socket Screw Countersunk BS 2470 - Self Colour - Pack of 100
100
£37.50 £45.00
No4 UNC x 1/4 SKUCSC0310200
5/16" UNC x 2" - Socket Screw Countersunk BS 2470 - Self Colour - Pack of 100
100
£37.50 £45.00
No4 UNC x 1/4 SKUCSC0370100 3/8" UNC x 1" - Socket Screw Countersunk BS 2470 - Self Colour - Pack of 50
50
£26.50 £31.80
No4 UNC x 1/4 SKUCSC0370100
3/8" UNC x 1" - Socket Screw Countersunk BS 2470 - Self Colour - Pack of 50
50
£26.50 £31.80
No4 UNC x 1/4 SKUCSC0500125 1/2" UNC x 1 1/4" - Socket Screw Countersunk BS 2470 - Self Colour - Pack of 5
5
£11.95 £14.34
No4 UNC x 1/4 SKUCSC0500125
1/2" UNC x 1 1/4" - Socket Screw Countersunk BS 2470 - Self Colour - Pack of 5
5
£11.95 £14.34
No4 UNC x 1/4 SKUCSC0620125 5/8" UNC x 1 1/4" - Socket Screw Countersunk BS 2470 - Self Colour
1
£10.11 £12.13
No4 UNC x 1/4 SKUCSC0620125
5/8" UNC x 1 1/4" - Socket Screw Countersunk BS 2470 - Self Colour
1
£10.11 £12.13
No4 UNC x 1/4 SKUCSC062012550 5/8" UNC x 1 1/4" - Socket Screw Countersunk BS 2470 - Self Colour - Pack of 50
50
£37.44 £44.93
No4 UNC x 1/4 SKUCSC062012550
5/8" UNC x 1 1/4" - Socket Screw Countersunk BS 2470 - Self Colour - Pack of 50
50
£37.44 £44.93
No4 UNC x 1/4 SKUCSC0750200 3/4" UNC x 2" - Socket Screw Countersunk BS 2470 - Self Colour
1
£14.73 £17.68
No4 UNC x 1/4 SKUCSC0750200
3/4" UNC x 2" - Socket Screw Countersunk BS 2470 - Self Colour
1
£14.73 £17.68
No4 UNC x 1/4 SKUCSC075020025 3/4" UNC x 2" - Socket Screw Countersunk BS 2470 - Self Colour - Pack of 25
25
£50.76 £60.91
No4 UNC x 1/4 SKUCSC075020025
3/4" UNC x 2" - Socket Screw Countersunk BS 2470 - Self Colour - Pack of 25
25
£50.76 £60.91
No4 UNC x 1/4 SKUCSC0750300 3/4" UNC x 3" - Socket Screw Countersunk BS 2470 - Self Colour
1
£15.88 £19.06
No4 UNC x 1/4 SKUCSC0750300
3/4" UNC x 3" - Socket Screw Countersunk BS 2470 - Self Colour
1
£15.88 £19.06
1/2 SKUCZP0500125 1/2" UNC x 1 1/4" - Socket Screw Countersunk BS 2470 - BZP - Pack of 5
5
£14.36 £17.23
1/2 SKUCZP0500125
1/2" UNC x 1 1/4" - Socket Screw Countersunk BS 2470 - BZP - Pack of 5
5
£14.36 £17.23
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29 Items