DIN 1474 Grooved Pins, Half Reverse Tapered Groove - ISO 8741 Grooved Pins, Half Length Reverse Tapered Groove

The slotted pins defined in the DIN 1474 standard published by the German Institute for Standardization (DIN) have a half reverse tapered groove, three longitudinal tapered grooves that enlarge the diameter of the pin. The expanded diameter is pressed back to the nominal diameter when inserted into the straight hole. As the pin tries to expand to a larger diameter, the force against the wall of the hole tightens the fit. This creates holding power against shock and vibration.

Similarly, in the ISO 8741 standard published by the International Organization for Standardization (ISO), half-length made of steel or austenitic stainless steel with three equally spaced threads, with a nominal diameter longitudinally from 1,5 mm to 25 mm (inclusive), on their outer surfaces. The characteristics of reverse taper splined pins are described (ISO 8741 Tapered pins - Half-length reverse taper splined). Material shifted to either side of the grooves forming an enlarged diameter with a larger nominal diameter causes a non-positive locking fit when these slotted pins are forced into a drilled hole equal to the nominal diameter.

The requirements for half-inverted taper threaded pins are included in the DIN 1474 standard under the following headings:

• Mechanical properties of stainless steel for half reverse taper grooved pins
• Chemical composition of stainless steel for half reverse tapered threaded pins
• Mechanical properties of steel for half reverse tapered threaded pins
• Chemical composition of steel for half reverse tapered threaded pins

Half-length reverse tapered threaded pins are solid printed fasteners that are rapidly gaining popularity. These pins have three parallel grooves and are often used as locking devices, pivots, levers or locating elements. Half-length reverse tapered threaded pins are considered suitable for a wide variety of fastening applications.

Our organization, among the numerous tests, measurements, analyses, and evaluations it provides for businesses in various sectors, also offers testing services for half-length reverse tapered threaded pins under the DIN 1474 standard and for half-length reverse tapered threaded pins under the ISO 8741 standard, thanks to its trained and expert staff and advanced technological equipment.