M4 x 20mm Cap Head Captive Screw (H3) (~DIN 912) | A2 Stainless Steel
| Quantity |
Unit Price
(ex. VAT)
|
Unit Price
(inc. VAT)
|
|---|---|---|
| 1 - 49 | £3.27 | £3.93 |
| 50 - 99 | £2.91 | £3.49 |
| 100 - 249 | £2.62 | £3.14 |
| 250 - 499 | £2.38 | £2.86 |
| 500 - 999 | £2.18 | £2.62 |
| 1000 + | £1.88 | £2.25 |
£3.93 / each
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Product Specification
| Thread Size | M4 |
| Pitch | 0.70mm |
| Length | 20mm |
| Captive Diameter | 3.0mm |
| Threaded Length | 8.0mm |
| Drive | H3 |
| Head Diameter | 7.0mm |
| Head Height | 4.0mm |
| Material | A2 Stainless Steel |
| Standard | Similar to DIN 912 |
Frequently Bought Together
Total Price: £0.00
M4 x 20mm Captive Socket Cap Head Screw | Similar to DIN 912 | A2 Stainless Steel
Designed for general engineering applications requiring retained fasteners, this M4 x 20mm captive machine screw combines a socket cap head with a reduced captive section. Once installed with a suitable retaining feature, the screw can be loosened from its mating thread while remaining associated with the panel or component. A2 Stainless Steel provides good corrosion resistance for general engineering, machinery, equipment and indoor or suitably protected external applications.
What Are Captive Socket Cap Head Screws?
Cap Head Captive Screws combine a DIN 912-style socket cap head with a reduced section intended for captive retention. They are useful on equipment that requires repeated access because the screw can remain with the removable part during servicing which reduces the chance of loose fixings being dropped or misplaced.
Common Applications
- Machinery Guards: Keeps compatible screws attached to removable guards during inspection, adjustment and maintenance.
- Control Cabinets: Retains panel fixings on electrical and automation enclosures that require repeated access.
- Equipment Covers: Supports serviceable covers where loose screws could be dropped inside machinery or misplaced.
- Maintenance Panels: Helps keep fastening hardware associated with access panels during routine servicing.
M4 x 20mm Captive Socket Cap Head Screw Dimensions
- Thread Size: M4
- Length: 20mm
- Threaded Length: 8.0mm
- Captive Diameter: 3.0mm
- Head Diameter: 7.0mm
- Head Height: 4.0mm
- Drive: H3
- Pitch: 0.70mm
- Standard: Similar to DIN 912
- Material: A2 Stainless Steel
Key Benefits
- Captive format can reduce dropped or misplaced fasteners during servicing when installed with a suitable retaining feature.
- 8.0mm threaded length provides the portion that engages the mating internal thread.
- 4.0mm head height provides the specified socket cap head profile.
- 0.70mm metric pitch matches the stated thread specification.
See our wider Socket Cap Head Captive Screws range for other sizes and stainless steel grades. For different head styles, browse our complete Captive Screws range. We also offer countersunk captive screws as well as pan head, button head and knurled options. For product-selection support, speak with our team on 01233 713581.
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