Self-forming screws

Self-forming screws

Achievable from M2 to M9

Self-forming screws form a metric thread in smooth holes in metals such as steel, aluminium and its alloys, copper and its alloys during screwing.

Self-forming screws offer a superior seal and a more precise fit than any other screw tightened in already threaded studs. These screws can be removed and other screws with a metric ISO standard thread can be screwed into the same seat.

Self-formingthreads achievable from M2 to M9

  • Three-lobed
  • Self-forming
  • Tipsgrow

Usable Materials

Carbon steel:

  • Cementing/carbonitriding steels
    • 15B2, 17B2, 18B2 according to UNI EN10263-3 or 17MnB4, 20MnB4 according to UNI EN 10263-4 and/or previous standards (e.g. UNI7356-74)
  • Quenched and tempered steels for classes 6.8 – 8.8 – 10.9 – 12.9
    • 23B2, 33B2, 38B2, 20MnB4, 23MnB4 according to EN 10263-4 and/or previous standards (e.g. UNI 7356-74)

Stainless steel:

  • Austenitic Quality A2, A4, in strength classes 50-70-80
  • Ferritic for heat-treated applications


We can produce screws with any type of head and drive. These images represent some examples.

Cylindrical head screw with cross drive

Cylindrical head cross/slot combination

Wide head false washer

Hex head with false washer and drive

Combined torx convex head and slot

Torx drive cylindrical head

Flat cylinder head cross/slot combination

Cylindrical head screwdriver slot

Flat countersunk head screwdriver slot

Cap countersunk head screwdriver slot

Convex head hex socket

Cylindrical head hex socket

Cylindrical head special drive (SIXNIKS)

Flat countersunk head with hex socket marking

Hex head false washer

Cylindrical head tamper-proof drive

Flanged head

Flat head square neck

Convex head square neck

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