Metric Hexagon Set Screws Din 933 (Fully Threaded) Grade A2 Stainless Steel

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Secure your outdoor, automotive, and general engineering projects with our Metric Hexagon Set Screws. Manufactured to the DIN 933 standard, these setscrews are fully threaded all the way to the underside of the head for maximum grip and versatility. Forged from premium Grade A2 (304) Stainless Steel, they offer exceptional resistance to rust and corrosion, making them the definitive choice for applications exposed to moisture, weather, or damp environments.

Premium Rust Resistance: Grade A2 (304) Stainless Steel construction ensures long-lasting protection against corrosion and oxidation.

Maximum Grip Versatility: DIN 933 specification means the shank is fully threaded, allowing you to clamp materials of varying thicknesses securely.

High Torque Application: The classic hexagon head allows for secure, slip-free tightening using standard spanners, sockets, or impact tools.

Unbeatable Corrosion Resistance

When you are building outdoor structures, repairing vehicles, or assembling equipment in damp environments, standard steel bolts will quickly succumb to rust. This not only weakens the joint but leaves unsightly orange stains on your timber or metalwork. These setscrews are manufactured from Grade A2 (also known as 304) Stainless Steel. This premium alloy offers a formidable defence against oxidation. Whether exposed to rain, condensation, or general atmospheric moisture, these fasteners will remain clean, strong, and visually appealing for years to come.

The Advantage of the "Set Screw" Design

In fastener terminology, a "set screw" (under the DIN 933 standard) refers to a hexagon-headed bolt that is fully threaded from the tip right up to the underside of the head. This design offers distinct advantages over partially threaded bolts (DIN 931). Because there is no unthreaded shank, you don't have to worry about a nut "bottoming out" before the joint is tight. This makes them incredibly versatile for clamping thin plates, fastening into pre-tapped blind holes, or adapting to unpredictable material thicknesses on site without needing to carry multiple bolt lengths.

Reliable, High-Torque Fastening

The traditional hexagon head remains an industry standard for a reason. Unlike slotted or cross-head drives that can "cam out" or strip under heavy pressure, the six flat sides of a hex head provide a massive surface area for your tools to grip. This allows you to apply high torque using a spanner, ratchet, or impact driver, ensuring a secure, vibration-resistant clamp. When paired with a matching A2 stainless steel nut and washer, you create a heavy-duty, weather-proof fastening system you can rely on.

Bolt Diameter	Spanner Size (AF)
M3	5.5 mm
M4	7 mm
M5	8 mm
M6	10 mm
M8	13 mm
M10	17 mm
M12	19 mm
M14	22 mm
M16	24 mm
M18	27 mm
M20	30 mm
M22	33mm
M24	36 mm
M27	41 mm
M30	46 mm

Key Features
Standard: DIN 933 (Equivalent to ISO 4017)
Head Style: Hexagon
Thread Type: Metric Coarse (Fully Threaded)
Material: Grade A2 (304) Stainless Steel
Corrosion Resistance: High (Suitable for wet/outdoor environments)
Tensile Strength: Typically 700 N/mm² (Class 70)
Whats in the box?
Metric Hexagon Set Screws Din 933 (Fully Threaded) Grade A2 Stainless Steel

Frequently Asked Questions

What is the difference between a Set Screw and a Bolt?

In the context of hex fasteners, a "Set Screw" (DIN 933) is fully threaded all the way to the head. A "Bolt" (DIN 931) is partially threaded, featuring a smooth, unthreaded section of shank below the head.

Is A2 Stainless Steel suitable for marine environments?

A2 stainless is excellent for general outdoor and wet use. However, if your project is near saltwater, submerged in seawater, or exposed to harsh pool chemicals (chlorine), we highly recommend upgrading to A4 (316) Marine Grade Stainless Steel for ultimate pitting resistance.

Are these screws magnetic?

A2 stainless steel is generally non-magnetic. However, the cold-working process used to forge the threads and the hex head can sometimes leave the fastener with a very slight magnetic pull, which is completely normal and does not affect its rust resistance.