M6 A4-80 Stainless Part Thread Hex Bolts DIN 931

Product Description

M6 A4-80 Stainless Steel Part-Thread Hexagon Bolts – DIN 931

M6 metric A4-80 high-tensile stainless steel part-threaded hexagon head bolts manufactured to DIN 931, with a standard 1mm metric coarse thread. The part-threaded design provides an unthreaded shank for improved alignment and shear support where the plain section passes through the joined components.

A4 is a molybdenum-bearing austenitic stainless steel commonly known as marine-grade stainless. It provides 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: M6
• Thread pitch: 1mm metric coarse
• Available lengths: 25mm to 100mm
• Material: A4 stainless steel
• Property class: A4-80
• Minimum tensile strength: 800 N/mm²
• Head style: Hexagon head
• Thread form: Part threaded with plain shank
• Nominal thread length: 18mm
• Spanner size: 10mm across flats
• Nominal head height: 4mm
• Finish: Natural stainless steel
• Dimensional standard: DIN 931 / ISO 4014
• British dimensional standard: BS EN ISO 4014:2022
• Material standard: BS EN ISO 3506-1:2020

Plain shank lengths are nominal and exclude manufacturing tolerances and the thread runout beneath the shank.

Typical Applications

• Marine and coastal equipment
• Outdoor machinery and structures
• Automotive and general engineering assemblies
• Chemical and process equipment
• Equipment requiring high strength and corrosion resistance
• Joints where a plain shank is required through the components

Select a bolt length that places the plain shank through the joined components without preventing the nut from clamping correctly. For best corrosion performance, use compatible M6 × 1 A4 stainless steel nuts and washers.

Stainless steel threads can be susceptible to galling. A suitable anti-seize compound and controlled assembly speed may help reduce this risk. Tightening torque must be selected for the particular joint 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.