Weld screws and weld bolts are welded firmly to the part.

Weld screws and weld bolts

Weld screws and weld bolts are welded firmly to existing parts. The advantage: The screw or bolt does not need to be held when fastening other parts later. They can be used in places with difficult access, for example in body manufacture in the automotive industry.

Weld bolts are welded tight with the arc. There is a small tip on the underside of the bolt for tip ignition bolt welding. Here, the arc ignites when the bolt is moved towards the part and melts the underside briefly. This takes place very quickly and is suitable for thinner sheets from 0.6 mm and small weld bolts from M3 to M8. In drawn arc bolt welding, the part and the bolt initially form an electric circuit. The arc occurs as soon as the bolt is lifted off the part.

Weld screws have so-called welding humps or welding points on the underside of the head. They are pushed through a punched hole and then welded firmly to the part by the welding humps. They are used where high breaking torques are required.

  • DIN 32501 weld bolts with male thread

Weld screws and weld bolts are manufactured in double-stroke technique on our cold forming presses.

Weld screws and weld bolts are welded firmly to the part by the arc. They do not need to be held when fastening later.

Suitable for fastenings to places with difficult access and for high breaking torques.

Mechanical engineering, automotive industry, electrical industry, telecommunications industry, etc.

a. Materials
Steel, case-hardened and quenched and tempered steels, high-grade steels; brass, aluminium and other non-ferrous metals

b. Strength classes
3.6 – 12.9

c. Thread types
All common

d. Drive types
Not applicable

e. Head types
All common

f. Dimensions
##

g. Additional processings
End processing: Shank slots, oval half dog point, coned half dog point, long dog point or other as required
Recutting

h. Surfaces
All common: galvanised (CrVI-free, RoHS-conform), nickel-plated, chromatised, Delta-Tone and Seal, Dacromet, Geomet etc. according to automotive and electrical industry specifications (VDA standard)

i. Coatings
Thread locks, thread seals (e.g. Tuflok, ScotchGrip, Precote, Loctite, wax coatings).
Samples according to VDA , PPAP on request

j. Heat treatment
All common: Annealing, carbonitriding, drawing, tempering, case hardening. Others on request

k. Batch sizes
from 30,000 pcs. (smaller quantities by agreement)

l. Documentations
Available for first sampling: Standard ISIR as cover sheet sampling; VDA Volume 2 Level 0-3; PPAP Level 1-3.

Press-in fasteners

Your contact:
Torsten Häufler

Torsten Häufler

Authorized officer / Sales

Phone: +49 (0) 23 51 . 97 85 – 18
Fax: +49 (0) 23 51 . 7 85 30
Email: t.haeufler@eichhoff-schrauben.de

Scroll to Top