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SPIROL Coiled and Slotted Spring Pins

SPIROL manufactures both types of Spring Pins - the Coiled Spring Pin and the Slotted Spring Pin. SPIROL also designs, manufactures and supplies equipment to install Spring Pins into your assembly. 



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SPIROL® Coiled Spring Pins are shock-absorbing elements that are integral, active components of a total assembly.  A problem solver, SPIROL Coiled Pins offer the lowest installed cost in most applications.

Standard SPIROL Coiled Spring Pins provide flexibility, uniform strength, equal stress distribution, closer diameter tolerances, no interlocking, trouble-free automatic feeding, and they reduce costs.   Heavy, standard, and light duty pins provide combinations of strength, flexibility and diameter to meet the specific engineering objectives of your pinning applications.

These pins offer unique features and benefits.

Read about what differentiates a Coiled Pin from other fasteners prior to installation, during installation,and under applied loads. 

Standard Coiled Spring Pin specifications

Design guidelines



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SPIROL® Slotted Spring Pins manufactured to ASME B18.8.4M Type B (Metric), ASME B18.8.2 (Inch) and ISO 8752 (EN 28752) are available from stock.

Standard Metric Pin specifications per ASME B18.8.4M.

Standard Inch Pins specifications per ASME B18.8.2.

ISO 8752 specifications


DIN 1481 is interchangeable with ISO 8752 (EN 28752) except for a variation in length tolerance.

The ASME B18.8.2 range meets the requirement of NASM 10971 (formerly MIL-P-10971), NASM 16562 (formerly MS 16562), NAS 561, SAE J496, and SAE AS7207 (Supersedes AMS 7207 and MS 17140-17190).

ISO 13337 (DIN 7346), lightweight slotted pins, are available made-to-order for volume applications.

Guidelines for choosing ASME or ISO for your application.

Additional technical information

We can provide special order slotted spring pins to ISO 13337 (DIN 7346) specifications.  Also, we have the capability to provide special lengths, materials, tolerances, finishes, and packaging.



SPIROL designs and builds Pin Insertion Equipment and Systems with fixturing for your Coiled and Slotted Spring Pins applications.