China DIN 976-1 Type B A4-70 Stud Bolts ASTM A193 Grade B8M SS316 Stud Bolts manufacturer

A4-70 stud Bolts are manufactured from 316 Stainless Steel in accordance with EN 3506 specification

What is A4-70 Stainless Steel? A4 is made from SS 316 material and 70 which classifies its strength. When we say A4-70 it generally means that the bolt / screw is from SS 316 grade and has an ultimate tensile strength as 70 kg or 700 n/mm2.

A threaded rod, also known as a stud, is a relatively long rod that is threaded on both ends; the thread may extend along the complete length of the rod. They are designed to be used in tension. Threaded rod in bar stock form is often called all-thread.
All thread rod, commonly referred to as fully threaded rod, redi-rod, continuously threaded rod, used for general purpose fastening for anything from an anchor bolt to a through bolt. A variety of grades and materials are available.

DIN 976 (preplaces DIN 975) Technical Specifications 

DIN 976-1 – 2016 Fasteners – Stud bolts – Part 1: Metric thread

This standard specifies dimensions and technical delivery conditions for stud bolts with metric thread made of steel, stainless steel or nonferrous metal

A4 stainless steel fasteners are typically known as marine grade stainless fasteners due to their resistance to salt water corrosion and can be found in a number of water-based applications. It is also resistant to salt spray.

Stainless Steel A4-70 THREAD ROD Specification

Specifications : DIN 976

Fasteners size : Bolt / Screw Size : M3 – M56 | 3/6″ to 2″ | Custom Sizes
Nuts Size : M3 – M56 | 3/6″ to 2″ | Custom Sizes
Washers Size : M3 – M56 | 3/6″ to 2″ | Custom Sizes

Fasteners Length : 3 mm to 200 mm

Fastener Threads : UNF, BSW, BSF, METRIC, UNC or as required

Surface Coating : Ptfe Coated Stainless Steel Fasteners Xylan Coating

EN ISO 3506-1:2020

ISO 3506-1:2020
Fasteners — Mechanical properties of corrosion-resistant stainless steel fasteners — Part 1: Bolts, screws and studs with specified grades and property classes

This part of ISO 3506 specifies the mechanical properties of bolts, screws and studs made of austenitic, martensitic and ferritic steel grades of corrosion-resistant stainless steels, when tested over an ambient temperature range of 10 °C to 35 °C. Properties vary at higher or lower temperatures. This part of ISO 3506 applies to bolts, screws and studs ⎯ with nominal thread diameter d u 39 mm, ⎯ of triangular ISO metric threads with diameters and pitches in accordance with ISO 68-1, ISO 261 and ISO 262, and ⎯ of any shape. It does not apply to screws with special properties, such as weldability.

EN ISO 3506-1 A4 Chemical Composition