Slotted Spring Pins

Slotted Spring Pins are general purpose low cost components used in numerous fastening applications. Compressed as it is installed, the pin applies continuous pressure towards the sides of the hole wall. The primary spring action of the Slotted Pin is focused on the area opposite the slot as the two halves of the pin compress during installation. This flexibility allows the Slotted Pin to accommodate wider hole tolerances than rigid Solid Pins which results in reduced manufacturing costs of the component.

SPIROL’s Slotted Spring Pin offering consists of 1) SPIROL Standard Metric, 2) SPIROL Standard Inch and Slotted Pins per 3) ISO 8752. SPIROL’s standard Slotted Spring Pins have a slot width narrower than the wall thickness and thus do not nest or interlock. This feature, combined with a smaller expanded (pre-insertion) diameter, results in a number of advantages compared to ISO 8752 pins:

  • Lower insertion force and smoother insertion.
  • Rounder pins, which in turn results in better conformance of the pin to the hole wall and eliminates the edge of the slot damaging the hole during insertion.
  • Lower stress in the spine of the installed pin. This results in longer pin life in shock or fatigue applications.
  • Ability to use automatic vibratory feeding of pins for installation without interlocking.
  • Plating of pins for additional corrosion resistance or appearance without “touch marks” or the bonding of nested pins.

SPIROL offers a comprehensive line of commercial (ASME and ISO) and military (MS/NASM and NAS) standard Slotted Pins ranging from 1.5mm / .062”(1/16”) to 12mm / .500” (1/2”) in high carbon and stainless steels.

SPIROL also designs and manufactures Pin Installation Equipment, from manual to fully automatic modules. Learn more about SPIROL’s Pin Installation Equipment, or contact us for support in determining the best pin for your application.

slotted spring pins
SPIROL Standard Metric - Slotted Spring Pins
SPIROL’s standard metric Slotted Spring Pins are available in diameters ranging from 1.5mm up to 12mm in high carbon steel, nickel stainless steel and chrome stainless steel. Standard finishes include plain and mechanical zinc plate.

These pins meet or exceed ASME B18.8.4M Type B specifications.

slotted spring pins
SPIROL Standard Inch - Slotted Spring Pins
SPIROL’s standard inch Slotted Spring Pins are available in diameters ranging from .062” (1/16”) to .500” (1/2”) in high carbon steel, nickel stainless steel and chrome stainless steel. Standard finishes include plain and mechanical zinc plate.

These pins meet or exceed ASME B18.8.2 specifications.

slotted spring pins
ISO 8752 - Slotted Spring Pins
SPIROL’s line of ISO 8752 Slotted Spring Pins are available in diameters ranging from 1.5mm up to 12mm in high carbon steel and nickel stainless in a plain finish.

Additional Information

Read How to Choose Fasteners that Maximize Assembly Life and other White Papers on Press Fit Pins.

Review our Application Stories for how SPIROL Engineers and Products have helped provide quality and cost saving solutions for fastening and joining problems.

SPIROL also designs and builds Pin Installation Equipment with fixtures for your Slotted Pin applications.

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