Corrosion-Resistant Carbon Steel Hollow Rivet Nut for Sheet Metal

The Carbon Steel Blue Yellow Zinc Plate Flat Head Knurled Body Hex Ground Hollow Rivet Nut is a versatile fastener designed for lightweight, corrosion-resistant connections in thin sheet metal applications. Combining carbon steel strength with dual zinc plating, this rivet nut features a flat head, knurled body, and hollow design, balancing high shear strength with easy installation in 1-3mm materials. The hex ground surface ensures secure torque transfer, making it ideal for automotive, electronics, and appliance manufacturing.

Material & Design:

Carbon steel C1018 (ASTM A325) with dual zinc plating (blue-yellow, 10μm total thickness), passing 800 hours salt spray test, suitable for indoor/outdoor use.

Hollow body (wall thickness 0.6-1.5mm): 40% lighter than solid rivet nuts, with knurled surface (0.4mm depth) preventing rotational slippage in aluminum and steel sheets.

Performance Specs:

Tensile strength: 450 MPa, shear strength: 350 MPa, exceeding ISO 14580 requirements for sheet metal up to 3mm.

Flat head (ISO 7046): Flush installation in countersunk holes (depth ≥3mm), ideal for aesthetic applications like automotive body panels.

Installation Flexibility:

Blind-side installation: Compatible with manual or pneumatic rivet nut tools, reducing setup time by 30% in hard-to-reach areas.

Thread compatibility: 6H tolerance for metric (M3-M8) and imperial (1/8"-5/16") screws, with smooth internal threads for easy engagement.

Compliance & Finish:

RoHS 3.0 compliant, with optional passivation for food-grade applications (FDA 21 CFR Part 175.300).

Hex ground surface: 15% larger torque contact area than standard knurling, enabling 25% higher torque (30Nm for M6) without surface damage.

Automotive Bodywork: Secures door panels, trunk lids, and fenders, resisting stone chips and car wash chemicals (pH 10-12).

Electrical Enclosures: Mounts circuit breakers and terminal blocks in outdoor switchgear, protecting against moisture and dust (IP54 environments).

Appliance Manufacturing: Fastens stainless steel casings in refrigerators and washing machines, with flat head ensuring seamless surface integration.

HVAC Systems: Connects ductwork and heat exchangers, enduring temperature fluctuations (-20°C to +120°C) and mild corrosion.

Weight & Strength Balance: Hollow design reduces material usage by 30% without compromising load capacity, ideal for lightweight vehicle manufacturing.

Installation Speed: Pre-aligned knurling and hex ground surface cut installation errors by 50%, favored by high-volume assembly lines.

Custom Sizing: Offer non-standard lengths (12-25mm) and thread pitches (0.75mm for M5) within 10-day lead time for custom projects.

Testing Rigor: 100% dimensional inspection via automated optical sorting (AOS), ensuring zero defective products in every batch.