DIN 7500 Thread-Forming Screws

DIN 7500 covers thread-forming self-tapping screws of the Taptite series. These fasteners do not require pre-cut threads in the hole: they form the thread themselves as they are driven into the material.

The special shape of the TRILOBULAR thread reduces friction while the thread is being formed in the hole, resulting in a stronger and more reliable joint. It gains resistance to static and dynamic loads, including vibration.

Manufacturing features

Fasteners made to DIN 7500, form M, have a countersunk head with a PZ cross recess. This type of fastener is installed firmly and reliably in the material: it is inserted into a prepared hole and forms the thread at the same time. Since the thread is actually formed rather than cut into the material, almost no metal chips are produced, and the joint comes out even, strong and reliable.

The use of such fasteners is becoming increasingly popular due to the convenience of installation. Self-tapping screws eliminate the need to pre-tap the thread in the hole, reducing the labor required for preparatory work. The screw can be driven in with a screwdriver (power or manual) fitted with a cross-shaped bit of the matching profile.

The screws have metric thread along their full length, with diameters ranging from M2 to M12. The head recess can vary: besides the classic PZ type, PH Phillips is also used. Equivalent fasteners are made to ISO 7045. When selecting an equivalent, the specifications should be compared in detail to confirm a full match.

Materials and applications

Thread-forming screws are made of high-strength hardened steel. Its strength is sufficient to form a thread of the required pitch in various metals and their alloys. For corrosion resistance, the metal can also be given a galvanic zinc coating – the zinc layer prevents premature deterioration caused by the environment.

Stainless steel grades A2 and A4 are also used to make such screws. It is used for fasteners intended for use in environments with constantly elevated corrosive activity.

Fasteners of this type are widely used across industry. They are used in machine building, for making parts for cars, machine tools, ships and aircraft. In addition, thread-cutting screws are convenient for assembling various metal structures – they provide a secure fixation and prevent self-loosening. Screws of this type can be used under dynamic loads.

Ordering from FLOK

FLOK supplies fasteners in wholesale and retail lots of any size.

Types of self-tapping screws and bolts

	DIN 7500 AE – thread-forming screws with cylindrical head and slot. Equivalent to the European standard DIN EN ISO 1207. FLOK supplies this type of screw in diameters ranging from 2 mm to 12 mm.
	DIN 7500 BE – thread-rolling screws with cylindrical head, diameters from M2 to M8, equivalent to DIN EN ISO 1580.
	DIN 7500 CE – Self-tapping screws with round head (cylindrical head shape with rounded edges) and PH Phillips cross recess or PZ Pozidrive combined recess. Diameters from M2 to M12. Equivalent to DIN EN ISO 7045.
	DIN 7500 DE – Thread-forming screws with hex head for a wrench, full thread, diameters from M2 to M12. Equivalent to DIN EN ISO 24017.
	DIN 7500 E – Self-tapping screws with cylindrical head and hex socket, diameters from M2 to M12. Equivalent to DIN EN ISO 912.
	DIN 7500 KE – Thread-rolling screws with countersunk head and slot, diameters from M2 to M12. Equivalent to DIN EN ISO 2009.
	DIN 7500 LE – Self-tapping screws with raised countersunk head and slot, diameters from M2 to M12. Equivalent to DIN EN ISO 2010.
	DIN 7500 ME – Self-tapping screws with countersunk head and PH Phillips cross recess or PZ Pozidrive combined recess. Diameters from M2 to M12. Equivalent to DIN EN ISO 7046-2.
	DIN 7500 ME – Thread-rolling screws with raised countersunk head and PH Phillips cross recess or PZ Pozidrive combined recess. Diameters from M2 to M12. Equivalent to DIN EN ISO 7047.
FLOK also supplies DIN 7500 self-tapping screws with the anti-vandal TORX “star” recess.