Stud bolt DIN 939 1.25d A4-70

Material acid-resistant steel (A4). * Product material differs; strength differs.
Material grade A4-70.
Short-end thread length: diameter x 1.25. NOTE! A stud bolt does not replace a stud!
- a stud has a longer threaded section on the end that goes into the block!

Stud bolts, often confused with studs, are industrial fastening components used mainly in block assemblies and guide components. A stud bolt has threads on both ends, while the middle section is unthreaded.
The thread lengths differ at each end of the stud bolt, and the threaded end that goes into the block is always shorter.
Depending on the standard, the thread dimensions of a stud bolt are determined by its diameter. For a DIN 938 stud bolt, the short-end thread length is 1 x d, where d is the stud bolt diameter. Correspondingly, for DIN 939, the short-end thread length is 1.25 x d.
The length of a stud bolt is stated as the effective length, where the threaded portion of the shorter end is deducted from the overall length in the dimensioning.