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Fasteners: Breakstem Rivets

Hemlok® (Structural) - Protruding Head

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Brochure
Description
Specifications
Installation Tools
Interactive Demo
Materials
(Rivet / Stem)
Sizes Product Series Data Sheets
Aluminum / Aluminum 1/4 02241 Imperial - Metric
Steel / Steel 1/4 02221 Imperial - Metric



Description

The Hemlok® rivet is a high strength, high clamp, structural breakstem rivet. It is available in steel or aluminum construction and the steel version provides the highest shear strength of all Avdel® blind rivets. The Hemlok® rivet relies on a combination of excellent bulbing tail formation on the application blind side and radial expansion into the application hole to create an extremely strong joint.

The large blind side footprint creates a load bearing surface, which absorbs the force of setting the rivet. Otherwise the setting force, or clamp load, could spread into the application material and might damage the material. This makes the Hemlok® rivet ideal for use in thin sheet, soft, brittle and low strength materials, as well as resulting in high resistance to pull-out loads. Radial expansion allows the rivet to provide a strong, vibration resistant joint and compensate for irregular, oversized, slotted or misaligned holes. Also, it can stop sheet movement in applications with non-standard holes.

The bulbing and expansion characteristics can only be controlled over a narrow range of material thickness and hole diameter. Therefore, the application hole size and grip range must meet the specified ranges to ensure proper installation and performance of the Hemlok® rivet.

Features

  • Exceptional shear and tensile strength
  • Large blind side bearing area against the rear sheet
  • Interference lock formed by a splined stem
  • Spreads the tail bearing/clamp load on the rear sheet
  • Ideal for thin sheet materials
  • Provides strong, vibration resistant joints
  • No damage, electrical problems or rattling due to loose stems
Assembly Material
  • Metal to metal
  • Metal to plastic
  • Thin sheet to thick metal
Typical Applications
  • Automotive
  • Warehouse racking
  • Ladders



Specifications

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Size PN Material
(Rivet / Stem)
Grip Hole Size ID M
max.
B
max.
D1
max.
T
min.
D2
max.
Shear
lbf min.
Tensile
lbf min.
1/4 02221-00812 Steel / Steel .060-.138 .264-.272 12 .539 .525 .105 .480 .134 2360 1978
02221-00813 Steel / Steel .110-.189 .264-.272 13 .590 .525 .105 .480 .134 2698 1978
02221-00814 Steel / Steel .132-.211 .264-.272 14 .612 .525 .105 .480 .134 2810 1978
02221-00815 Steel / Steel .189-.268 .264-.272 15 .669 .525 .105 .480 .134 2810 1978
02221-00817 Steel / Steel .268-.346 .264-.272 17 .747 .525 .105 .480 .134 3147 1978
02221-00818 Steel / Steel .295-.374 .264-.272 18 .775 .525 .105 .480 .134 3372 1978
02221-00819 Steel / Steel .346-.425 .264-.272 19 .826 .525 .105 .480 .134 3597 1978
02221-00821 Steel / Steel .425-.504 .264-.272 21 .905 .525 .105 .480 .134 3597 1978
02241-00812 Aluminum / Aluminum .060-.138 .264-.272 12 .539 .525 .105 .480 .134 1124 600
02241-00813 Aluminum / Aluminum .110-.189 .264-.272 13 .590 .525 .105 .480 .134 1349 600
02241-00814 Aluminum / Aluminum .132-.211 .264-.272 14 .612 .525 .105 .480 .134 1394 600
02241-00815 Aluminum / Aluminum .189-.268 .264-.272 15 .669 .525 .105 .480 .134 1460 600
02241-00817 Aluminum / Aluminum .268-.346 .264-.272 17 .747 .525 .105 .480 .134 1574 600
02241-00819 Aluminum / Aluminum .346-.425 .264-.272 19 .826 .525 .105 .480 .134 1574 600
02241-00821 Aluminum / Aluminum .425-.504 .264-.272 21 .905 .525 .105 .480 .134 1574 600



Installation Tools

Search tools by fastener part number

Part numbers are listed in order of base tool (no nose equipment), nose assembly, nose tip, complete tool (includes nose equipment).
Size Series Installation Tools
(Standard setups. Contact Avdel® for options.)
7287 nG4
1/4 02221 07287-00200
07612-020001)
(07612-02001)2)
07287-00004
71234-02000
71230-15800
07612-02001
71234-00261
02241 07287-00200
07612-020001)
(07612-02001)2)
07287-00004
71234-02000
71230-15800
07612-02001
71234-00261


1) Requires adaptor 07267-00800.
2) Nose tip included in the nose assembly.



Interactive Demo

• 02221 - Protruding head - Steel rivet / Steel stem
• 02241 - Protruding head - Aluminum rivet / Aluminum stem