Ø25mm M2.5 x 5mm Stainless Thumbwheel to DIN 653

Our Ø25mm Stainless Steel ThumbWheel with an M2.5 x 5mm male thread is manufactured to DIN 653 and features a flat knurled design without a boss, making it ideal for applications requiring secure hand tightening and frequent manual adjustment.

Manufactured from A2 (304) stainless steel, this thumbwheel offers excellent corrosion resistance, durability and a professional finish, making it suitable for use in industrial, commercial and hygienic environments. The precision knurled profile provides a secure grip, allowing components to be tightened or loosened quickly without the need for tools.

Whether you're building new equipment, carrying out maintenance or designing OEM machinery, this stainless thumbwheel provides a reliable, reusable fastening solution that saves time during assembly and servicing.

Product Features

• Manufactured to DIN 653
• Head Diameter: Ø25mm
• Thread Size: M2.5
• Thread Length: 5mm
• Male threaded design
• Flat profile with no boss
• Precision knurled edge for improved grip
• Manufactured from A2 (304) Stainless Steel
• Tool-free installation and adjustment
• Excellent corrosion resistance
• Suitable for repeated tightening and loosening
• Ideal for industrial and commercial applications
• Bespoke sizes available subject to minimum order quantities

Technical Specification

• Standard: DIN 653
• Head Diameter: Ø25mm
• Thread Size: M2.5
• Thread Length: 5mm
• Thread Type: Male
• Head Style: Flat Knurled
• Boss: None
• Material: A2 (304) Stainless Steel
• Finish: Self Colour Stainless Steel
• Adjustment: Hand Tightening

Why Choose a Stainless Steel ThumbWheel?

Thumbwheels are designed for applications where fast, repeatable manual adjustment is essential. Unlike conventional fasteners that require tools, the knurled outer edge allows users to tighten and loosen components quickly by hand, improving efficiency during maintenance, inspection and equipment setup.

The flat, no-boss design is particularly suitable where space is limited or a low-profile fastening solution is preferred.

Manufactured from A2 (304) Stainless Steel

This thumbwheel is manufactured from A2 (304) stainless steel, an austenitic stainless steel widely used throughout engineering, food processing and commercial manufacturing.

Benefits include:

• Excellent corrosion resistance in most industrial environments
• Resistant to rust, oxidation and moisture
• Hygienic and easy to clean
• High tensile strength
• Good ductility and formability
• Suitable for repeated use
• Attractive professional finish
• Good resistance to foodstuffs, cleaning agents and many organic chemicals

A2 stainless steel performs exceptionally well in general outdoor and industrial applications. For continuous exposure to marine or highly saline environments, A4 (316) stainless steel is generally recommended.

Typical Applications

Knurled Thumb nuts are widely used across numerous industry sectors, including:

• Industrial Machinery: for fastening panels, covers, and assemblies that require regular and accurate manual adjustments.
• Automotive Engineering: for vehicle interiors and engine compartments for fastening, where swift and hassle free modifications are required.
• Catering & Hydraulic Environments: for any situation where adjustment needs to be preserved and protected from water ingress.
• Electronics & Electrical Systems: for safe and accessible securing of electronic enclosures and control panels.
• DIY & Custom Projects: for hobbyists and professionals looking for reliable, tool-free fastening.

Important Product Information

This product forms part of our expanding range of stainless steel thumbwheels.

As this is a developing product range, the current lead time is typically 4–12 weeks while demand is established. As the most popular sizes become stocked items, future orders are expected to be available from stock for significantly faster delivery.

If you require an alternative size, please browse our full range of Male Threaded Stainless ThumbWheels . If stainless steel is not essential, our standard generic hand wheel range may provide a more economical solution with many sizes from stock.

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