M4 x 40mm Cap Head Captive Screw (H3) (~DIN 912) | Marine Grade A4 Stainless Steel
| Quantity |
Unit Price
(ex. VAT)
|
Unit Price
(inc. VAT)
|
|---|---|---|
| 1 - 49 | £5.22 | £6.27 |
| 50 - 99 | £4.64 | £5.57 |
| 100 - 249 | £4.18 | £5.02 |
| 250 - 499 | £3.80 | £4.56 |
| 500 - 999 | £3.48 | £4.18 |
| 1000 + | £2.98 | £3.58 |
£6.27 / each
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Product Specification
| Thread Size | M4 |
| Pitch | 0.70mm |
| Length | 40mm |
| Captive Diameter | 3.0mm |
| Threaded Length | 8.0mm |
| Drive | H3 |
| Head Diameter | 7.0mm |
| Head Height | 4.0mm |
| Material | A4 Stainless Steel |
| Standard | Similar to DIN 912 |
Frequently Bought Together
Total Price: £0.00
M4 x 40mm Captive Socket Cap Head Screw | Similar to DIN 912 | A4 Stainless Steel
Designed for transport equipment, inspection panels and removable covers, this M4 x 40mm socket head captive 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. A4 Stainless Steel provides enhanced corrosion resistance for suitable outdoor, washdown, coastal and marine applications where a higher level of environmental resistance is required.
What Are Captive Socket Cap Head Screws?
Captive Socket Cap Head Screws are specialist fasteners designed to stay attached to a panel, cover or component after the threaded portion has been loosened. A reduced captive section works with a compatible panel, washer, sleeve or retaining feature so the screw can remain retained instead of falling free.
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 40mm Captive Socket Cap Head Screw Dimensions
- Thread Size: M4
- Length: 40mm
- 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: A4 Stainless Steel
Key Benefits
- H3 hex socket drive provides positive engagement with a matching driver or key.
- Similar to DIN 912 describes the DIN 912-style dimensional format used for this captive screw.
- M4 thread size with 40mm overall length provides the primary screw dimensions.
- 3.0mm captive diameter provides the reduced section used with a compatible retention feature.
See our wider Socket Cap Head Captive Screws range for other sizes and stainless steel grades. We also stock other styles in our Captive Screws range, including countersunk captive screws for applications where a flush head is preferred. For product-selection support, speak with our team on 01233 713581.
Fri 8.30 am - 3.30 pm
