400mm Stud Bolt M20 Grade 8.8 Heat Treated, DIN 6379 - AMF

Take advantage of a combination of robust tensile performance, standardised DIN conformity and long reach for dependable bolted joints in machinery and structural assemblies; order the required stud bolts directly via Metav Werkzeuge or contact our consultants for selection support.

Stud bolt DIN 6379 M20x400 mm, tempered to 8.8 (AMF)

A Stud bolt DIN 6379 M20x400 mm engineered for secure threaded connections in industrial machinery and structural applications, supplied as a single piece and finished to property class 8.8

• Stud bolt DIN 6379, M20×400 mm
• Tempered to property class 8.8
• High tensile strength for heavy-duty use
• Supplied as single piece, SKU 4000833288NW

Reliable joining for heavy-duty assemblies

The Stud bolt DIN 6379 M20x400 mm provides a straightforward, standardised solution for long-span threaded connections. Compliance with DIN 6379 ensures consistent thread geometry and dimensional accuracy, which simplifies assembly with matching nuts and threaded components. The long 400 mm overall length allows for clamping thick flanges or multiple component stacks without resorting to special fasteners, while the M20 thread delivers a proven interface for high-load bolting tasks. This results in fewer part numbers to manage and a predictable bolted-joint behaviour under operational loads.

Material treatment and what property class 8.8 delivers

Tempering to property class 8.8 denotes a heat-treated steel fastener with elevated mechanical performance compared with untreated carbon steels. The tempering process increases yield and tensile capacity and improves resistance to plastic deformation under load, which is particularly relevant where repetitive or dynamic forces occur. Specifying a tempered fastener reduces the likelihood of elongation or loss of clamp force in service. For customers less familiar with fastener grades, property class 8.8 is commonly chosen where a balance of strength and ductility is required for industrial applications.

Practical installation and suitable applications

The threaded stud is designed for use where a through-bolt or double-ended stud is preferable: repair work, machinery assembly, gearbox mounting and structural clamping are typical use cases. With an M20 thread, standard nuts and washers can be paired to achieve the required clamping force; torquing must follow the assembly specifications appropriate to property class 8.8 components to ensure joint integrity. The single-piece supply simplifies inventory and traceability, and the long reach of the component removes the need for extensions or splicing in most configurations.

For advice on selecting AMF stud bolts or for procurement assistance with tempered M20×400 mm studs, contact Metav Werkzeuge by e‑mail at info@metav-werkzeuge.com or by phone on +49 2822 7131930 and our specialists will support the specification and delivery

Technical data

• Article number / SKU: 4000833288NW
• Brand: AMF
• Standard: DIN 6379

Facts

• Thread: M20
• Overall length: 400 mm
• Width: 27 mm
• Packaging unit: 1

Special features

• Tempered to property class 8.8
• Product type: Stud bolt
• Addition: b: 250

FAQ

What does the DIN 6379 designation mean for the component?
DIN 6379 refers to the German standard that defines dimensions and geometry for this type of stud bolt, ensuring compatibility with mating parts and interchangeability in industrial assemblies.

Is the M20×400 stud ready to install with standard nuts?
Yes, the M20 thread on this stud bolt matches standard M20 nuts and washers; the long 400 mm length accommodates thick assemblies or multiple stacked components.

How is the product supplied and how can it be identified?
The AMF stud bolt is supplied as a single piece and can be referenced by SKU 4000833288NW for ordering and inventory purposes.

What are the benefits of the tempering to property class 8.8?
Tempering to property class 8.8 enhances the fastener's strength and resistance to permanent deformation, making it suitable for heavy-duty and cyclic load applications where reliable clamp retention is required.

Can the stud bolt be used for structural applications?
The stud's conformity to DIN 6379 and its 8.8 tempering make it suitable for many structural and machinery applications; specific use should follow project engineering standards and torque specifications to ensure joint safety.

Manufacturer / Responsible: Metav Werkzeuge GmbH; Parkring 45; 46446 Emmerich; Germany; +49 2822 7131930; info@metav-werkzeuge.com