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Short cycle

Internally threaded stud (type IS) for short-cycle welding

BEARFIX · Technical product

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The type IS internally threaded stud is designed specifically for short-cycle welding (SC). It creates a permanent threaded fastening point on sheet metal without drilling or access to the reverse side of the component.

It is ideal for applications requiring a subsequent threaded connection, such as fastening components, brackets, housings or decorative elements to thin and medium-gauge sheet metal.

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Main technical specifications

  • Welding process: Short cycle – no shielding gas or ceramic ferrule required.
  • Reference standard: DIN EN ISO 13918 (type IS)
  • Available threads: M3, M4, M5 and M6 (other sizes on request)
  • Standard materials:
    • Copper-plated grade 4.8 steel (4–8 µm electrolytic copper finish)
    • A2-50 stainless steel
  • Weldability: Excellent
  • Typical applications: Thin to medium-gauge sheet metal (0.8–3 mm)

Dimension table

Diameter (d1)Length (l1) mmFlange diameter (d2) mmFlange height (h1) mmInternal thread (D)Available materials
5 mm6 – 306.00.7 – 1.4M3Grade 4.8 steel / A2-50
6 mm8 – 407.00.7 – 1.4M4Grade 4.8 steel / A2-50
7.1 mm10 – 409.00.8 – 1.4M5Grade 4.8 steel / A2-50
8 mm15 – 409.00.8 – 1.4M6Grade 4.8 steel / A2-50
Note: The length after welding (l2) depends on l1 and the welding parameters.

Common applications

The type IS internally threaded stud is suitable for many industrial sectors, including the automotive industry for fastening trim, sensors and interior components; domestic appliances for threaded anchor points in housings and panels; metal construction for threaded supports on profiles and sheet metal; and metal furniture for detachable joints in structures.

Compatible accessories

For PHM-10, GD 12sc and PHM-1A welding guns:

Stud diameter (d1)Stud length (l2)Nut item no.
5 mm / M3≤ 40 mm / > 40 mm82-50-003
6 mm / M4≤ 40 mm / > 40 mm82-50-004
7.1 mm / M5≤ 40 mm / > 40 mm82-50-071
8 mm / M6≤ 40 mm / > 40 mm82-50-006
Special additional accessories are required for lengths over 40 mm. Please contact us.

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