DIN 7978 Tapered Pin with Internal Thread

The DIN 7978 tapered pin with internal thread is made of steel. Pins are metal fasteners of cylindrical or tapered shape, machined rods. They join parts and assemblies, with the fastener itself remaining in a static state. During installation, they are given a specific position depending on the nature and geometry of the surfaces being fastened. The DIN 7978 tapered pin with internal thread is widely used in mechanical engineering, instrument making and other manufacturing fields. Made to German standards, it corresponds to GOST 9464-79 of the Russian Federation and the international standard ISO 8736. Equivalent: GOST 9464, ISO 8736.

DIN 7978

Before installation, the parts are positioned individually so that the holes for the pin diameter align along the longitudinal axis. Then, using a special tool, the pin is driven into the hole with an interference fit, i.e. tightly. As a result, the friction force between the fastener’s surface and the hole walls increases enough to prevent the fastener from falling out or even turning slightly.

Compared to cylindrical pins, tapered pins are more versatile in use. The tapered shape allows the fastener to be used repeatedly, while the accuracy of the fastened surfaces, parts and assemblies remains unchanged.

The DIN 7978 pin is a fastener that allows two parts to be fixed with high precision in the required position.

Steels with high strength and resistance to corrosion and aggressive media are used to manufacture these pins. On request, the pin can be made of hardened steel. If required, the fastener undergoes additional treatment to increase its strength.

DIN 7978

d2	M3	M4	M5	M6	M8
t1	4	6	8	10	12

l (mm)	d
	5	6	8	10	12	16
30
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50
55
60
70
80
90
100