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Home / Screws, Bolts & Nails / Captive Screws / Captive Thumb Screws / Captive High Type Thumb Screws / M8 Captive High Type Thumb Screws - A1 Stainless Steel
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M8 x 30mm Captive Knurled Thumb Screws High Type - A1 Stainless Steel

Product Description

M8 x 30mm Captive Knurled Thumb Screws High Type - A1 Stainless Steel

Knurled Thumb Screws High Type Captive Screws are designed to remain attached to a panel or assembly when loosened, preventing loss and improving safety in applications where fall out can lead to equipment damage, machine downtime, and foreign object contamination. Their reduced-diameter, unthreaded shank allows panels and components to be opened or removed without the screw becoming detached, making them ideal for access panels, covers, and enclosures that require regular maintenance, servicing, or inspection.

Depending on the application, captive screws can be either permanently retained or removable for complete disassembly. Common retention methods include captive washers, retaining rings, and partially threaded entry holes.

These Knurled Thumb Screws High Type Captive Screws are made from A1 Stainless Steel which provides corrosion and oxidation resistance.

Need a Custom Captive Screw?

Our Captive Knurled Thumb Screws High Type Screws are modified in-house from stock manufactured to DIN 464. For custom captive dimensions please contact us at sales@gwr-fasteners.co.uk and a member of our team will be happy to provide a quotation.

If you require dimensions outside the DIN 464 standard, we also offer a complete bespoke captive screw manufacturing service.

Please note that the minimum order quantity on custom captive screws is 50 units.
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Specifications

Head Diameter
30.42mm (max)
Knurled Head Length
6mm
Head Length
18mm
Shoulder Diameter
16mm (max)
Shoulder Length
12mm
Length (Excluding the Head)
30mm
Captive Diameter
6.2mm
Thread Length
16mm
Thread Diameter
M8
Thread Pitch
1.25mm
Material
Stainless Steel (A1)
Base Part Manufacturing Standard
DIN 464
Product Code
A1-CKTSHT-M8-30

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M8 x 30mm Captive Knurled Thumb Screws High Type - A1 Stainless Steel

Knurled Thumb Screws High Type Captive Screws are designed to remain attached to a panel or assembly when loosened, preventing loss and improving safety in applications where fall out can lead to equipment damage, machine downtime, and foreign object contamination. Their reduced-diameter, unthreaded shank allows panels and components to be opened or removed without the screw becoming detached, making them ideal for access panels, covers, and enclosures that require regular maintenance, servicing, or inspection.

Depending on the application, captive screws can be either permanently retained or removable for complete disassembly. Common retention methods include captive washers, retaining rings, and partially threaded entry holes.

These Knurled Thumb Screws High Type Captive Screws are made from A1 Stainless Steel which provides corrosion and oxidation resistance.

Need a Custom Captive Screw?

Our Captive Knurled Thumb Screws High Type Screws are modified in-house from stock manufactured to DIN 464. For custom captive dimensions please contact us at sales@gwr-fasteners.co.uk and a member of our team will be happy to provide a quotation.

If you require dimensions outside the DIN 464 standard, we also offer a complete bespoke captive screw manufacturing service.

Please note that the minimum order quantity on custom captive screws is 50 units.
Head Diameter
30.42mm (max)
Knurled Head Length
6mm
Head Length
18mm
Shoulder Diameter
16mm (max)
Shoulder Length
12mm
Length (Excluding the Head)
30mm
Captive Diameter
6.2mm
Thread Length
16mm
Thread Diameter
M8
Thread Pitch
1.25mm
Material
Stainless Steel (A1)
Base Part Manufacturing Standard
DIN 464
Product Code
A1-CKTSHT-M8-30
No reviews left yet
Write A Review

What is a captive screw?
A captive screw is a fastener designed to remain attached to a panel, cover, or assembly even when loosened. This prevents the screw from being lost, misplaced, or dropped during maintenance, servicing, or access operations.

What are captive fasteners used for?
Captive fasteners are commonly used in electronic enclosures, communications equipment, industrial machinery, medical devices, aerospace applications, data centres, and access panels. They help improve maintenance efficiency and reduce the risk of lost hardware.

Why use captive screws instead of standard screws?
Captive screws provide several advantages:
•    Prevent lost or dropped fasteners
•    Reduce maintenance time
•    Improve equipment reliability
•    Help meet industry safety requirements
•    Minimize foreign object debris (FOD) risks
•    Improve serviceability in field applications

Can captive screws help meet safety and compliance requirements?
Yes. By preventing loose hardware and reducing the risk of foreign object damage, captive fasteners can support safety initiatives and industry compliance requirements in many regulated industries.

Do you offer custom captive fasteners?
Yes, we offer custom captive fasteners. If you contact our sales team and let them know the required screw type, material, length, thread length and captive diameter, we can provide you with a quote. 
 

What is the lead time for captive fasteners?
Lead times vary depending on product type, quantity, and customization requirements. Our standard lead time on Captive fasteners is 10 working days, however this may vary depending on workload, base part availability, and current stock levels. If you need your parts urgently, please contact our sales team at sales@gwr-fasteners.co.uk 

Can I order samples?
Unfortunately, we do not offer samples on our captive fasteners as they are usually manufactured to order however on certain stock items you are able to order 1 off’s if needed. 

What is the minimum order quantity?
A wide selection of our captive fasteners are available to buy individually, however on none stock sizes or for custom captive dimensions there is a minimum order quantity order of 50 units. 
 

Customer Reviews

M8 x 30mm Captive Knurled Thumb Screws High Type - A1 Stainless Steel

Item in Stock (87 Available)

Product Code A1-CKTSHT-M8-30

Stock includes products available to modify

Dispatch Lead Time

10 Working Days
VAT Number: 241281436 Registered company: 08097172
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