Grub Screws & Set Screws

A grub screw, also known as a set screw is used for securing sliding or moving components in place. Grubs screws have threaded inserts instead of tapering screw grooves. The screw is passed through a threaded hole in the outer object and then tightened against the inner object to prevent it from moving relative to the outer object. Grub screws are commonly used to secure a pulley or a gear to a shaft or for attaching a handle or cam to a spindle. You can learn more in our comprehensive grub screws guide and our complete set screws guide.



These screws can be made from materials such as steel, stainless steel, nylon, brass and ceramic and are available in a wide range of very small sizes.

Types of Grub Screw

Grub Screws are divided into two types, a hexagon head (sometimes called a hexagon set screw) and a socket head.

Hexagon Head Grub Screw - these have a hexagonal head with a thread that extends all the way to the head.

Socket Head Drive Grub Screws - these are headless with recessed drive ports into which you can insert a tool such as a hexagonal Allen key. When used the entire screw is encased in the material it is fastening without any exposed screw or bolt heads making them ideal for mechanical systems where metal surfaces rub together or to provide an aesthetic finish. These are generally more corrosion resistant, can be tightened using more torque and are secure and difficult to remove.

Drive Types

Grub screws have different drive types, including a straight slot for a standard flat screwdriver, a hex socket, a square socket, an external hex, an external square or a Bristol spline.

Point Types

Grub screws also have a range of different point types which mean they can be used for a range of different applications.

Flat Point screws are used where a screw must press flat against a surface.

Domed Point screws apply pressure to the part opposite the screw head.

Cone Point and Cup Point screws apply force to soft materials or to fit into a depression to the part opposite the screw head. Cup point screws apply a greater force.

Knurled Point screws are like cup point screws but have parallel serrations with a ratchet-locking action preventing loosening due to vibration.

Extended Point or Dog Point screws have a cylindrical head at the end which can be used as a pivot shaft for other parts that need to rotate around it.


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Description Price Length Thread Size Material Stainless Steel Type Finish Head Shape Screw Type Drive Type
RS Stock No. 192-5561
BrandRS PRO
£15.33
1 Bag of 50
Bag(s)
50mm M10 - - Plain Hex Set Screw Hex
RS Stock No. 192-5570
BrandRS PRO
£13.64
1 Bag of 50
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20mm M12 - - Plain Hex Set Screw Hex
RS Stock No. 192-5567
BrandRS PRO
£9.45
1 Bag of 25
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90mm M10 - - Plain Hex Set Screw Hex
RS Stock No. 192-5595
BrandRS PRO
£31.26
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50mm M20 - - Plain Hex Set Screw Hex
RS Stock No. 192-5559
BrandRS PRO
£10.35
1 Bag of 50
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30mm M10 - - Plain Hex Set Screw Hex
RS Stock No. 192-5565
BrandRS PRO
£9.48
1 Bag of 25
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75mm M10 - - Plain Hex Set Screw Hex
RS Stock No. 192-5593
BrandRS PRO
£25.11
1 Bag of 25
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30mm M20 - - Plain Hex Set Screw Hex
RS Stock No. 192-5557
BrandRS PRO
£8.37
1 Bag of 50
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20mm M10 - - Plain Hex Set Screw Hex
RS Stock No. 192-5574
BrandRS PRO
£18.36
1 Bag of 50
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40mm M12 - - Plain Hex Set Screw Hex
RS Stock No. 192-5584
BrandRS PRO
£3.66
1 Bag of 25
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40mm M16 - - Plain Hex Set Screw Hex
RS Stock No. 192-5541
BrandRS PRO
£6.42
1 Bag of 100
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30mm M6 - - Plain Hex Set Screw Hex
RS Stock No. 192-5537
BrandRS PRO
£4.25
1 Bag of 100
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12mm M6 - - Plain Hex Set Screw Hex
RS Stock No. 192-5590
BrandRS PRO
£12.18
1 Bag of 10
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90mm M16 - - Plain Hex Set Screw Hex
RS Stock No. 192-5581
BrandRS PRO
£17.89
1 Bag of 25
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90mm M12 - - Plain Hex Set Screw Hex
RS Stock No. 192-5576
BrandRS PRO
£20.85
1 Bag of 50
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50mm M12 - - Plain Hex Set Screw Hex
RS Stock No. 192-5551
BrandRS PRO
£5.63
1 Bag of 25
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60mm M8 - - Plain Hex Set Screw Hex
RS Stock No. 192-5598
BrandRS PRO
£15.88
1 Bag of 10
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70mm M20 - - Plain Hex Set Screw Hex
RS Stock No. 192-5546
BrandRS PRO
£5.34
1 Bag of 50
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20mm M8 - - Plain Hex Set Screw Hex
RS Stock No. 192-5586
BrandRS PRO
£18.85
1 Bag of 25
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50mm M16 - - Plain Hex Set Screw Hex
RS Stock No. 192-5562
BrandRS PRO
£7.62
1 Bag of 25
Bag(s)
60mm M10 - - Plain Hex Set Screw Hex
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