Jack Nuts & Blind Expansion Inserts: Secure Threading for Closed Profile
Jack Nuts are lightweight, high-performance expansion fasteners specifically engineered for thin, soft, or hollow materials. Designed for applications where reverse-side access is impossible or sheet metal is too thin to thread, Jack Nuts deliver strong, permanent female threads with exceptional pull-out resistance. Their blind installation capability streamlines assembly, reducing labor time and production costs.
Key Features & Operational Advantages
Blind Side Installation: Requires access to only one side of the workpiece, making it ideal for closed profiles, tubing, and field maintenance.
Expanded Footprint for Load Distribution: As tightened, the nut body collapses outwards into four sturdy legs on the blind side. This large contact area spreads the clamping load, preventing deformation or cracking of delicate base materials.
Wide Grip Range Tolerance: Effortlessly accommodates variations in material thickness without needing multiple fastener sizes.
Reusable Internal Threads: Provides robust, repeatable metric or imperial machine threads that withstand repeated disassembly without stripping.
Technical Specifications
Material Options: Carbon Steel (Zinc/Nickel plated for anti-corrosion), Stainless Steel (304 / 316).
Thread Sizes: Metric M4 to M8 / Imperial #6-32 to 1/4"-20 (Custom thread pitches available upon request).
Grip Range: 0.4 mm – 4.8 mm (0.015" – 0.190").
Surface Treatments: Cr3+ Zinc Plating, Black Oxide, or customized finishes, fully compliant with RoHS and salt-spray test standards.
Application Scenarios Engineered to excel in thin-gauge metal, plastic, and composite structures across various industries:
Automotive & Transportation: Roof rack mounting, door trim panels, aftermarket accessory attachment, and hollow tube assembly.
HVAC & Building Construction: Ductwork installation, composite aluminum paneling, and metal roofing sheet attachment.
Industrial Cabinets & Electronics: Enclosure doors, control panel mounting, and thin-wall chassis assemblies.
Marine & Outdoor Equipment: Kayak hardware installation, marine deck fittings, and outdoor signage.