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® Dowel Bushings provide precision alignment of mating components and shear-load protection for the bolt when installation guidelines are followed. Their hollow design permits a fastening screw or bolt to pass through the controlled inside diameter into a threaded component, isolating the bolt from shear loading and increasing joint integrity without the need for separate bolt holes. They have lead-in beveled chamfers to ease insertion and prevent skiving of the bushing during installation.
Unit of Measure

Specifications

Brands

 N/A Spirol®

Finish

 N/A Oiled Phosphate Plain Oiled Zinc plated

Maximum Outside Diameter

 N/A 0.333 in

Minimum Outside Diameter

 N/A 0.323 in

Length

 N/A 1.250 mm

Material

 N/A Steel

Nominal Bolt Diameter (Decimal)

 N/A 0.25 in

Nominal Bolt Diameter (Fractional)

 N/A 1/4 in

Minimum Single Shear Strength

 N/A 2670 lb

Maximum Hole Tolerance (±)

 N/A 0.318 in

Minimum Hole Tolerance (±)

 N/A 0.313 in

Wall Thickness

 N/A 0.028 mm

Features and Benefits

Features and Benefits

 N/A
  • Staggered Seams - Prevent interlocking & eliminate the need to separate them during manual assembly
  • Automated Assembly - Can be used with automatic feeding
  • Chamfered Ends - Facilitate Installation
  • Cost Savings - Eliminate the need for a 2nd bolt hole or precision hole
  • Bolt Protection - From shear loads perpendicular to the bolt
  • Specifications Are based on standard bolt sizes.