Overview
A rod with metric threads on both sides, where the screwed-in threaded end has a constant length that is approximately twice the nominal thread diameter of the rod itself. The screwed end of the stud is installed in the screw hole of one part, and the other part is tightened through the through hole with a nut on the free nut end of the stud. GOST 22038-76 is a standard that describes a threaded rod with a tolerance of 2d. This standard was developed by the German Institute for Standardization (DIN) and contains technical requirements for this type of fastener.
Strength class of GOST 22038-76
The strength class of a GOST 22038-76 stud is the maximum applied force at which the stud begins to fracture. Studs of GOST 22038-76 are manufactured in strength classes 5.8 and 8.8. From strength class 8.8, the stud is considered high-strength.
Fastening group of GOST 22038-76
Depending on the material of manufacture, studs of GOST 22038-76 are divided into groups:
- High-strength fasteners
- Stainless steel fasteners
Materials for the manufacture of GOST 22038-76 studs
Studs of GOST 22038-76 are made of the following materials:
- Steel of strength class 5.8 and 8.8. The high strength class 8.8 allows the bolts to be used in highly loaded connections.
- Stainless steel. Steel grades A2 and A4 allow the fasteners to be used at high temperature extremes and in aggressive and humid environments.
Application range of GOST 22038-76 studs
A threaded rod with a tolerance of 2d is a part that has the shape of a cylindrical billet with one threaded part and a tapered, non-threaded part at the end. The stud is used to connect parts where it is necessary to ensure a reliable grip with the possibility of additional length adjustment.
