LISI nuts and collars products are designed to fit with their related HI-LOK™/HI-TIGUE™ and HI-LITE™ pins. Collars’ wrenching element is designed to break-away at a controlled preload.

HI-LITE™ pins are the direct evolution of HI-LOK™ pins. These fasteners can be used for clearance, or low interference fit throughout aircraft, from wings to fuselage, in engine fairings, and more. Combined with HI-LITE™ nuts and collars, they provide up to 13% weight saving compared to the previous HI-LOK™ generation.

HI-LOK is a simple two-part fastener engineered to achieve in one all-purpose system the design features suiting many of today’s aerospace assembly needs. Consistent torque on each fastener installed is achieved through the integrated functions of the system working together.

HI-LOK Nuts Complete Listing: HI-LITE Pins Complete Listing: HI-LITE Collars Standard Configuration HI-LITETMPins* Selection Guide Material Suggested Maximum Temperature (subject to finish)** Nominal size shank For use on 1/64" oversize shank Titanium 350º F HLN258 HLN259 HLN261 A-286 160º F HLN1 HLN645 HLN265 Wasploy

Hi-lok collars are used in conjunction with hi-lok head pins to form a secure joint through the use of a the 2 threaded pieces. Designed for specific applications the new threaded hi-lok systems are easier to install and maintain with less special tooling needed.

Hi-Lok pins serve a similar function to aircraft bolts, providing high shear and tensile strength fastening, but their preload consistency removes the need for torque inspection. Aero Fastener stocks a wide variety of aircraft hi-lok pins. Browse our selection of aerospace hi-lok pins today! Same-day shipping available.

HI-LITE™ nuts and collars are designed to fit HI-LITE™, PULL-IN™, PULL-STEM™ & TAPER HI-LITE™ pins. With a wide range of shapes, materials and coatings, they are suited for most of structural assemblies and are commonly used in the aerospace industry in …

Self-locking K-Fast ™ nuts are designed for use on Hi-Lok ™, HI-TIGUE ™, Veri-Lite ® and Aero-Lite ® pins. Tools, also available from Howmet Fastening Systems, feature precise preload control for automatic installation and help provide the airframe industry with high-speed efficiency and cost effectiveness in production.

HI-LITE™ nuts and collars are designed to fit HI-LITE™, PULL-IN™, PULL-STEM™ & TAPER HI-LITE™ pins. With a wide range of shapes, materials and coatings, they are suited for most of structural assemblies and are commonly used in the aerospace industry in …

The Hi-Lok ™ fastener is versatile and can match the best qualities of a bolt/nut or pin swaged collar. Therefore, tooling is easily adaptable to large-scale production with high-speed equipment and automatic collar feed attachments.