Avdel Hemlok 02221-00818 Structural Blind Rivet; 1/4 Inch (0.250 Inch), (0.295 - 0.374 Inch Grip), Protruding Head, Steel, Zinc Clear Finish

The Hemlok® rivet is a high strength, high clamp, structural break stem 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 blindside 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 a thin sheet, soft, brittle, and low strength materials, as well as resulting in high resistance to pull-out loads. The 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.

• 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 load/clamp on the rear sheet
• Ideal for thin sheet materials
• Provides strong, vibration resistant joints
• No damage, electrical problems or rattling due to loose stems