M4 x 18mm Cap Head Captive Screw (H3) (~DIN 912) | Marine Grade A4 Stainless Steel
| Quantity |
Unit Price
(ex. VAT)
|
Unit Price
(inc. VAT)
|
|---|---|---|
| 1 - 49 | £3.33 | £3.99 |
| 50 - 99 | £2.96 | £3.55 |
| 100 - 249 | £2.66 | £3.19 |
| 250 - 499 | £2.42 | £2.90 |
| 500 - 999 | £2.22 | £2.66 |
| 1000 + | £1.90 | £2.28 |
£3.99 / each
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Product Specification
| Thread Size | M4 |
| Pitch | 0.70mm |
| Length | 18mm |
| 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 18mm Captive Socket Cap Head Screw | Similar to DIN 912 | A4 Stainless Steel
For laboratory equipment, instrumentation and technical enclosures, this M4 x 18mm captive hex socket screw provides a retained fastening format that can reduce loose screws during servicing or repeated access. The H3 hex socket gives positive tool engagement while the 7.0mm head diameter and 4.0mm head height follow a DIN 912-style cap head geometry. 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?
Socket Head Captive Screws provide positive hex-key drive engagement together with a retained fastening format. They are commonly specified for machinery, enclosures and serviceable equipment where panels need to be removed or opened regularly without losing the fasteners.
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 18mm Captive Socket Cap Head Screw Dimensions
- Thread Size: M4
- Length: 18mm
- 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
- 4.0mm head height provides the specified socket cap head profile.
- 0.70mm metric pitch matches the stated thread specification.
- 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.
Compare more sizes in our Captive Socket Cap Head Screws range. We also stock other styles in our Captive Screws range, including countersunk captive screws for applications where a flush head is preferred. If you are unsure which length or captive diameter suits your panel, contact our team on 01233 713581.
Fri 8.30 am - 3.30 pm
