Product Description
M4 A2 Stainless Steel Socket Grub Screws – Cup Point
These M4 socket grub screws are manufactured from A2 stainless steel and feature an internal hexagon drive with a cup point. Their headless design allows them to be installed flush with or below the surface of the component.
The cup point concentrates pressure around the edge of the contact area, helping to produce a secure grip against shafts and mating components. These grub screws are commonly used for securing gears, pulleys, collars, handles and knobs where a projecting screw head is not required.
Key Features
- Thread size: M4 metric coarse
- Thread pitch: 0.7mm
- Material: A2 stainless steel
- Point style: Cup point
- Drive type: Internal hexagon socket
- Hex key size: 2mm
- Headless design for flush or recessed installation
- DIN 916 cup-point pattern
- Current corresponding standard: ISO 4029 / BS EN ISO 4029:2026
Typical Applications
- Securing gears and pulleys to shafts
- Retaining shaft collars and adjusting rings
- Fixing knobs, handles and levers
- Machinery and equipment assembly
- Automotive, engineering and maintenance work
- Applications requiring a flush, headless fixing
A2 Stainless Steel
A2 stainless steel provides good corrosion resistance for indoor use and general outdoor applications. For marine, coastal, swimming-pool or chemically aggressive environments, an A4 stainless steel fastener may be more suitable.
When assembling stainless steel fasteners, use a suitable anti-seize compound where appropriate to reduce the risk of thread galling.
Related Products and Technical Information
- M3 A2 stainless steel socket grub screws
- M4 A2 stainless steel slotted cup-point grub screws
- View all grub screws
- Metric thread data guide
- A2 versus A4 stainless steel guide
- Stainless steel thread galling guide
Please note: Dimensions and specifications are provided as a guide. If compliance with a particular standard, material property class or dimensional tolerance is essential, please confirm suitability before ordering.
| A | B | C | D |
| 4mm | 10mm | 2mm | 0.7 |
| 4mm | 4mm | 2mm | 0.7 |
| 4mm | 6mm | 2mm | 0.7 |
| 4mm | 8mm | 2mm | 0.7 |
Please Note: Specifications given are intended as a guide only. If critical to your project please check with us first.
