M12 A4-80 Stainless Hex Set Screws DIN 933

Product Description

M12 A4-80 Stainless Steel Fully Threaded Hexagon Set Screws – DIN 933

M12 metric A4-80 high-tensile stainless steel fully threaded hexagon set screws manufactured to DIN 933, with a standard 1.75mm metric coarse thread. Also commonly described as fully threaded hex bolts, these fasteners provide high strength together with excellent resistance to corrosion.

A4 is a molybdenum-bearing austenitic stainless steel commonly known as marine-grade stainless. It offers improved resistance to corrosion and chloride-containing environments compared with A2 stainless steel. Property class A4-80 provides a minimum tensile strength of 800 N/mm² (800 MPa).

Product Specifications

• Thread size: M12
• Thread pitch: 1.75mm metric coarse
• Available lengths: 16mm to 100mm
• Material: A4 stainless steel
• Property class: A4-80
• Minimum tensile strength: 800 N/mm²
• Head style: Hexagon head
• Thread form: Fully threaded
• Spanner size: 19mm across flats
• Nominal head height: 7.5mm
• Finish: Natural stainless steel
• Dimensional standard: DIN 933 / ISO 4017
• British dimensional standard: BS EN ISO 4017:2022
• Material standard: BS EN ISO 3506-1:2020

Available Lengths

M12 × 16, 20, 22, 25, 30, 35, 40, 45, 50, 55, 60, 65, 70, 75, 80, 90 and 100mm.

Typical Applications

• Marine and coastal equipment
• Outdoor machinery and structures
• Chemical and process equipment
• Food-processing machinery
• Automotive and general engineering
• High-strength, corrosion-resistant assemblies

For best corrosion performance, use with compatible M12 × 1.75 A4 stainless steel nuts and washers. Stainless steel threads can be susceptible to galling, particularly when assembled quickly or at high torque. Applying a suitable anti-seize compound and tightening at a controlled speed can help reduce this risk. The correct tightening torque must be determined from the joint design and operating conditions.

Browse our complete ranges of A4-80 stainless steel fasteners, metric hexagon bolts, nuts and washers.

Please note: Dimensions are provided as a guide. Please contact us before ordering if a particular dimension, certification or standard is critical to your application.

Please Note: Specifications given are intended as a guide only. If critical to your project please check with us first.