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TM DIN 7500

THREAD-FORMING SCREW FOR METALS

This fastening solution has been designed specifically to reduce install costs in a range of applications while also providing optimal joint performance.

This thread-forming screw meets the DIN 7500 standard for installation in soft materials, so it:

  • makes pre-tapping unnecessary;
  • reduces problems associated with the assembly of internal nuts and screws;
  • allows for the benefits of pre-tapped holes, such as with a transversal thread.

Technical data

INSTALLING THE SCREW WITHOUT CHAMFER

(small bulge)

COUNTERBORE

EXTRUDED HOLE

WITH CHAMFER

Screw not yet installed

Standard material: BS 3111 9/2 steel. Surface hardness 390 HV. Core hardness 340-380 HV.
Other materials and surface features available upon request.

CHARACTERISTICS AND BENEFITS

  • Trilobular threading.
  • Improved, faster grip and initial thread forming.
  • Resistant to loosening caused by vibration.
  • Ensures smoother tightening.
  • Prevents stripping of the internal threading.

APPLICATION GUIDELINES

The thread forming process moves around material, which causes a slight bulging at the entrance of the hole. This bulging can inhibit a strong joint between the components. One solution to this problem is to is to make a 90° countersink chamfer with a depth ranging from 0.5 to 1 time the thread pitch. Another option is to drill a shallow counterbore.

A counterbore at the top of the pilot hole enables the screw to be tightened consistently for each of the components to be assembled. As a result, tightening torque remains constant so long as screw material and diameter remains unchanged. For applications in thin sheet metal, an extruded hole will increase pull-out strength.

Keep in mind that thread-forming screws feature high resistance to vibration.

SECTORS OF APPLICATION

  • Automotive
  • Manufacturing
  • Construction
  • Engineering
  • Electronics

TM DIN 7500

THREAD-FORMING SCREW FOR METALS

Download the technical specifications

Here you can get a PDF with the product’s full technical specifications.

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