M4 x 12mm Captive Knurled Thumb Screw (~DIN 464) | A1 Stainless Steel
| Quantity |
Unit Price
(ex. VAT)
|
Unit Price
(inc. VAT)
|
|---|---|---|
| 1 - 49 | £4.80 | £5.76 |
| 50 - 99 | £4.27 | £5.12 |
| 100 - 249 | £3.84 | £4.61 |
| 250 - 499 | £3.49 | £4.19 |
| 500 - 999 | £3.20 | £3.84 |
| 1000 + | £2.74 | £3.29 |
Product Specification
| Thread Size | M4 |
| Pitch | 0.70mm |
| Captive Diameter | 3.0mm |
| Thread Length | 12mm |
| Threaded Length | 4mm |
| Head Diameter | 16.35mm |
| Head Height | 9.5mm |
| Knurled Height | 3.5mm |
| Shank Diameter | 8.0mm |
| Material | A1 Stainless Steel |
| Standard | Similar to DIN 464 |
Frequently Bought Together
Total Price: £0.00
M4 x 12mm Captive Knurled Thumb Screw (~DIN 464) | A1 Stainless Steel | Vital Parts – THUM464CT-M4-12-A1
Manufactured for controlled hand fastening, this M4 x 12mm Captive Knurled Thumb Screw (~DIN 464) | A1 Stainless Steel combines a knurled grip head with a precision metric thread for serviceable assemblies. It features a M4 thread with a 12mm thread length and 4mm threaded length, giving the screw a defined fixing depth while the 3.0mm captive diameter helps retain the component within suitable captive screw assemblies. The 16.35mm head diameter, 9.5mm head height and 3.5mm knurled height provide a secure finger grip for tightening, loosening and repositioning without standard driver tools.
Made from A1 Stainless Steel with a self-colour finish, this screw is suitable for engineering, manufacturing and equipment maintenance environments where corrosion resistance and clean stainless appearance are required. The design is Similar to DIN 464, making it a useful DIN 464-style option for machine guards, removable covers and inspection panels where a balanced reach and hand-adjustable head are required.
What Are Captive Knurled Thumb Screws?
Captive knurled thumb screws are externally threaded fasteners with a raised, textured head that can be tightened by hand. The captive section is designed to help keep the screw associated with its panel or assembly, reducing the chance of misplaced fixings during inspection, cleaning or maintenance. This M4 x 12mm version follows a Similar to DIN 464 format for hand-operated fastening applications.
Applications and Key Industries
These DIN 464-style captive knurled thumb screws are used across the UK in applications where a secure fixing must remain easy to operate by hand. Common use cases include:
- Manufacturing and Engineering: Hand-operated fastening for M4 machine assemblies, removable guards and access covers.
- Electronics and Enclosures: Securing inspection panels, casework and serviceable housings where a 12mm screw length is suitable.
- Machinery Maintenance: Captive-style retention for covers and fixtures that are removed frequently during servicing.
- Jigs and Fixtures: Manual clamping or positioning where a 4mm threaded length provides controlled engagement.
Purchasers typically include procurement teams, maintenance engineers, machine builders and workshop supervisors who need dependable hand-adjustable stainless fasteners for serviceable assemblies.
Why Choose This Captive Knurled Thumb Screw?
This 12mm length version offers a practical balance between reach and hand control, helping operators secure removable parts efficiently. Its DIN 464-style form, captive diameter and stainless construction make it useful for equipment that is opened or adjusted regularly.
Key Features
- Tool-free operation: Knurled thumb head supports quick hand tightening and removal without specialist tools.
- Captive-style design: 3.0mm captive diameter helps reduce loose or misplaced fixings when used in a suitable assembly.
- Defined metric engagement: M4 thread with 4mm threaded length supports consistent fastening depth.
- Stainless steel construction: A1 Stainless Steel provides a clean, corrosion-resistant finish for engineering applications.
Product Specifications
- Thread Size: M4
- Thread Length: 12mm
- Threaded Length: 4mm
- Captive Diameter: 3mm
- Head Diameter: 16.35mm
- Head Height: 9.5mm
- Knurled Height: 3.5mm
- Shank Diameter: 8mm
- Pitch: 0.70mm
- Standard: Similar to DIN 464
- Material: A1 Stainless Steel
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