Huck-Clinch® Blind Rivets
Huck-Clinch® blind rivets are a precision made aerospace bind rivet produced to the requirements of MIL-R-7885 and NAS1686 procurement standards using the latest manufacturing methods and statistical process controls. Huck-Clinch® blind rivets are available in standard and oversize diameters and with alloy steel or CRES spindles. The Huck-Clinch® blind rivet meets sheet take-up and hole fill requirements of the military and industry specifications. The rivet is a 4-piece assembly consisting of the components shown in the illustration below.
Grip Adjuster: The grip adjuster is the part of the fastener that forms the blind head and generates clamp load during installation.
Sleeve: The sleeve is the body of the fastener that comes in contact with the fastened material.
Stop Anvil: The stop anvil is part of the installation tool, which allows for all diameters of rivets to be installed with a single nose assembly. Its function is to stop spindle motion during installation to provide for a flush spindle break.
Pin: The pin or spindle is the core of the fastener and is designed to perform the functions of blind head formation, sheet take-up, hole-fill and lock forming.
Pintail: The pintail is that portion of the spindle that the installation tool grips and pulls to install the fastener.
Huck-Clinch® blind rivet key performance features
HOLE FILLING CAPABILITIES:
With a combined high compression load applied during blind head formation and shank expansion during spindle lock formation the HUCK-CLINCH® provides hole fill capabilities at both ends of the installed fastener.
SHEET TAKE-UP CAPABILITIES:
The grip adjuster on the HUCK-CLINCH® blind rivet maintains a consistent blind side pressure during installation to ensure sheet take-up.
HIGH CLINCH® AND RETAINED CLAMP FORCE:
Clamp force is generated and maintained through the consistent load applied by the grip adjuster which adjusts itself to grip condition by bulbing to maintain consistent clamp load.
ENHANCED FATIGUE PERFORMANCE:
Because of the hole-fill capability and high clamp loads, the HUCK-CLINCH® rivet provides enhanced fatigue performance.
The HUCK-CLINCH® is resistant to vibration due to the hole-fill and high clamp capabilities of the fastener. Additionally, the solid circle internal lock provides a tight fit between pin and sleeve which also resists vibratory conditions.
FLUSH PIN BREAK:
The stop anvil used as part of the fastener assembly is designed to stop spindle motion during installation to result in a flush pin break. Shaving to achieve aerodynamic surface quality is not normally required as it might be with other types of blind rivets.
INTERNAL SOLID CIRCLE LOCK, HIGH SPINDLE RETENTION:
The positive spindle lock is created by extruding sleeve material into a lock groove on the pin during installation. The lock results in a high spindle retention load.
CAPABLE OF RIVET SHAVING:
The HUCK-CLINCH® blind rivet is designed to form an internal "solid circle" mechanical lock during the installation process. This permits aerodynamic rivet shaving on contoured surfaces without damage to the mechanical lock or performance of the installed fastener.
MOISTURE & CREVICE CORROSION RESISTANT:
The HUCK-CLINCH® is designed with interference fit between spindle and sleeve, which prevents moisture from entering the fastener from the installed side. With the hole fill capabilities of the rivet sleeve, further joint sealing is achieved.
ENHANCED JOINT ALLOWABLES:
The HUCK-CLINCH® blind rivet has been approved for insertion in MIL-HDBK-5 (MMPDS Handbook) joint allowable section (Chapter 8) for blind rivets.
Field experience by our customers has shown that the HUCK-CLINCH® blind rivet system has unusually low rework incidence.
AFSR provides performance reports to support each of the performance features listed above. Product qualification reports to Military and Industry standards are available through the Aerospace Fastener Division, Tucson Arizona.