Machine Screws - Slotted Countersunk - UNC

A machine screw is a type of screw that is commonly used in industrial and manufacturing applications to secure components within engines, electronic products and general machinery.

Countersunk machine screws are designed for installation in countersunk holes to enable them to sit flush within the finished surface. This type of fastener should be installed with a flat-bladed screwdriver or bit.

They are available in zinc plated, brass and stainless-steel finishes.

About UNC Thread

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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11 Items

Code Product Name Info Pack Size Price Qty
1/4 MSUCSCBR025050 1/4" UNC x 1/2" - Machine Screw Countersunk Slotted - Brass - Pack of 25
25
£28.30 £33.96
1/4 MSUCSCBR025050
1/4" UNC x 1/2" - Machine Screw Countersunk Slotted - Brass - Pack of 25
25
£28.30 £33.96
1/4 MSUCSCBR025075 1/4" UNC x 3/4" - Machine Screw Countersunk Slotted - Brass - Pack of 25
25
£28.30 £33.96
1/4 MSUCSCBR025075
1/4" UNC x 3/4" - Machine Screw Countersunk Slotted - Brass - Pack of 25
25
£28.30 £33.96
1/4 MSUCSCBR025100 1/4" UNC x 1" - Machine Screw Countersunk Slotted - Brass - Pack of 5
5
£37.81 £45.37
1/4 MSUCSCBR025100
1/4" UNC x 1" - Machine Screw Countersunk Slotted - Brass - Pack of 5
5
£37.81 £45.37
1/4 MSUCSCBR025125 1/4" UNC x 1 1/4" - Machine Screw Countersunk Slotted - Brass - Pack of 5
5
£37.81 £45.37
1/4 MSUCSCBR025125
1/4" UNC x 1 1/4" - Machine Screw Countersunk Slotted - Brass - Pack of 5
5
£37.81 £45.37
No4 UNC x 3/16 MSUCSCSC004018 No4 UNC x 3/16" - Machine Screw Countersunk Slotted - Self Colour - Pack of 50
50
£10.42 £12.50
No4 UNC x 3/16 MSUCSCSC004018
No4 UNC x 3/16" - Machine Screw Countersunk Slotted - Self Colour - Pack of 50
50
£10.42 £12.50
No4 UNC x 3/16 MSUCSCSC006025 No6 UNC x 1/4" - Machine Screw Countersunk Slotted BS 1981 - Self Colour - Pack of 25
25
£10.00 £12.00
No4 UNC x 3/16 MSUCSCSC006025
No6 UNC x 1/4" - Machine Screw Countersunk Slotted BS 1981 - Self Colour - Pack of 25
25
£10.00 £12.00
No4 UNC x 3/16 MSUCSCSC008037 No8 UNC x 3/8" - Machine Screw Countersunk Slotted - Self Colour - Pack of 50
50
£10.06 £12.07
No4 UNC x 3/16 MSUCSCSC008037
No8 UNC x 3/8" - Machine Screw Countersunk Slotted - Self Colour - Pack of 50
50
£10.06 £12.07
No4 UNC x 3/16 MSUCSCSC010062 No10 UNC x 5/8" - Machine Screw Countersunk Slotted - Self Colour - Pack of 50
50
£12.58 £15.10
No4 UNC x 3/16 MSUCSCSC010062
No10 UNC x 5/8" - Machine Screw Countersunk Slotted - Self Colour - Pack of 50
50
£12.58 £15.10
No4 UNC x 3/16 MSUCSCSC012050 No12 UNC x 1/2" - Machine Screw Countersunk Slotted - Self Colour - Pack of 50
50
£10.14 £12.16
No4 UNC x 3/16 MSUCSCSC012050
No12 UNC x 1/2" - Machine Screw Countersunk Slotted - Self Colour - Pack of 50
50
£10.14 £12.16
No4 UNC x 3/16 MSUCSCSC050100 1/2" UNC x 1" - Machine Screw Countersunk Slotted - Self Colour - Pack of 5
5
£18.46 £22.15
No4 UNC x 3/16 MSUCSCSC050100
1/2" UNC x 1" - Machine Screw Countersunk Slotted - Self Colour - Pack of 5
5
£18.46 £22.15
No8 UNC x 1/2 MSUCSCZP008050 No8 UNC x 1/2" - Machine Screw Countersunk Slotted - BZP - Pack of 50
50
£11.96 £14.35
No8 UNC x 1/2 MSUCSCZP008050
No8 UNC x 1/2" - Machine Screw Countersunk Slotted - BZP - Pack of 50
50
£11.96 £14.35
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11 Items