EFC International
EFC International
1940 Craigshire St. Louis,
MO 63146-4008
Phone: 1 314.434.28881
Contact: www.efc-intl.com/contact
Website: www.efc-intl.com
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Spirol® Slotted Spring Pins are headless hollow cylindrical tubes having a slot down the entire length with chamfered or round ends to aid installation. This type of pin is produced to a controlled outside diameter slightly greater than the hole in which it will be installed. Compressed as it is installed, the pin applies continuous pressure toward the sides of the hole wall, providing tension in a radial manner to prevent loosening created by vibration or shock. EFC International carries Spirol® Slotted Spring Pins that meet ISO, DIN, ASME-Metric, and ASME-Inch Standards.

ASME 18.8.4M TYPE B (METRIC) SLOTTED SPRING PINS have thicker walls and a slot running the full length of the pin, allowing even compression during installation. This creates continuous pressure toward the walls of the mounting hole, providing radial tension to prevent loosening from shock or vibration.
Unit of Measure

Specifications

Brands

 N/A Spirol®

Type

 N/A Slotted

Material

 N/A Steel

Finish

 N/A Plain/Oiled

Length

 N/A 28 mm

Length Tolerance (±)

 N/A 0.50 in

Nominal Chamfer Length C

 N/A 0.50 in

Nominal Pin Diameter

 N/A 3 mm

Nominal Wall Thickness C

 N/A 0.60 in

Pin Diameter D

 N/A 3.30 to 3.50 mm

Recommended Hole Size

 N/A 3.00 to 3.10 mm

Temp

 N/A 3

Industry Standards/Certifications

 N/A International Organization for Standardization (ISO 8752) European Standards (EN 28752)

Material and Hardness

Material and Hardness

 N/A
  • Carbon Steel - HV 420-520
  • Chrome Stainless Steel - HV 440-560
  • Nickel Stainless Steel - Work Hardened

Features and Benefits

Features and Benefits

 N/A EFC recommends that you consider ASME pins if you are experiencing insertion problems or performance failures. This is based on the important advantages of ASME pins, which include:
  • Lower Insertion Force - resulting from a smaller free diameter of the pin in relation to the nominal hole
  • No Interlocking - the maximum gap in the free diameter is less than the wall thickness of the pin
  • Higher Shear Strength - based on increased wall thickness, higher minimum hardness & narrower slots
  • Straightness - ASME specifies straightness requirements not included with ISO
  • Substitute for ISO pins - (3mm and larger) without review or change