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 Drive Type Screw Type
RS庫存編號 137-758
BrandRS PRO
HK$138.17
毎包:50 個
Bag(s)
6mm M4 Stainless Steel A2 304 Plain Hex Socket Set Hex Grub Screw
RS庫存編號 137-720
BrandRS PRO
HK$115.90
毎包:50 個
Bag(s)
6mm M3 Stainless Steel A2 304 Plain Hex Socket Set Hex Grub Screw
RS庫存編號 431-965
BrandRS PRO
HK$142.97
毎盒:25 個
Box(es)
3mm M2 Steel - Black, Self-Colour Hex Socket Set Hex Grub Screw
RS庫存編號 529-905
BrandRS PRO
HK$130.35
毎盒:100 個
Box(es)
3mm M3 Steel - Black, Self-Colour Hex Socket Set Hex Grub Screw
RS庫存編號 530-028
BrandRS PRO
HK$147.75
毎盒:100 個
Box(es)
12mm M6 Steel - Black, Self-Colour Hex Socket Set Hex Grub Screw
RS庫存編號 529-933
BrandRS PRO
HK$105.32
毎盒:100 個
Box(es)
4mm M4 Steel - Black, Self-Colour Hex Socket Set Hex Grub Screw
RS庫存編號 281-697
BrandRS PRO
HK$173.93
毎盒:100 個
Box(es)
12mm M10 Steel - Black Oxide Hex Hex Grub Screw
RS庫存編號 530-034
BrandRS PRO
HK$145.76
毎盒:100 個
Box(es)
16mm M6 Steel - Black, Self-Colour Hex Socket Set Hex Grub Screw
RS庫存編號 137-714
BrandRS PRO
HK$138.39
毎包:50 個
Bag(s)
3mm M3 Stainless Steel A2 304 Plain Hex Socket Set Hex Grub Screw
RS庫存編號 281-704
BrandRS PRO
HK$283.29
毎盒:100 個
Box(es)
16mm M10 Steel - Black, Self-Colour Hex Socket Set Hex Grub Screw
RS庫存編號 529-911
BrandRS PRO
HK$139.94
毎盒:100 個
Box(es)
6mm M3 Steel - Black, Self-Colour Hex Socket Set Hex Grub Screw
RS庫存編號 529-949
BrandRS PRO
HK$106.18
毎盒:100 個
Box(es)
6mm M4 Steel - Black, Self-Colour Hex Socket Set Hex Grub Screw
RS庫存編號 137-815
BrandRS PRO
HK$105.43
毎包:25 個
Bag(s)
6mm M6 Stainless Steel A2 304 - Hex Socket Set Hex Grub Screw
RS庫存編號 187-0670
BrandRS PRO
HK$167.33
毎包:50 個
Bag(s)
3mm M3 Stainless Steel A4 316 Plain Hex Hex Grub Screw
RS庫存編號 187-0838
BrandRS PRO
HK$130.58
毎包:25 個
Bag(s)
12mm M8 Stainless Steel A4 316 Plain Hex Socket Set Hex Grub Screw
RS庫存編號 187-0771
BrandRS PRO
HK$103.96
毎包:25 個
Bag(s)
6mm M6 Stainless Steel A4 316 Plain Hex Socket Set Hex Grub Screw
RS庫存編號 187-0721
BrandRS PRO
HK$176.56
毎包:50 個
Bag(s)
12mm M4 Stainless Steel A4 316 Plain Hex Socket Set Hex Grub Screw
RS庫存編號 137-871
BrandRS PRO
HK$117.66
毎包:25 個
Bag(s)
16mm M8 Stainless Steel A2 304 Plain Hex Socket Set Hex Grub Screw
RS庫存編號 529-955
BrandRS PRO
HK$230.47
毎盒:100 個
Box(es)
12mm M4 Steel - Black, Self-Colour Hex Socket Set Hex Grub Screw
RS庫存編號 124-7389
BrandRS PRO
HK$137.43
毎包:50 個
Bag(s)
8mm M3 Stainless Steel A2 304 Plain Hex Hex Grub Screw