Stainless Steel 304 (18-8) Hex Nut-Standard Inch Coarse Thread Hex Machine Screw Nut

描述

1. Performance & Material Properties
   • 304 (18-8) Stainless Steel Alloy: Austenitic 304 stainless offers a balanced combination of tensile strength (≈515 MPa), yield strength (≈215 MPa), and elongation (>40 %), with excellent toughness down to –196 °C.
   • Coarse UNC Thread Profile: Standard UNC series threads (e.g., ¼-20, 5/16-18, 3/8-16) are rolled for high fatigue resistance, precise pitch engagement, and rapid assembly in inch-based machine screw systems.
   • Corrosion & Temperature Resistance: The 18-8 chromium-nickel matrix delivers superior resistance to oxidation, pitting, and crevice corrosion in most indoor, outdoor, and mildly aggressive chemical environments; service range –50 °C to +400 °C.
   • Hexagonal Geometry: Six-flat hex shape maximizes wrench contact area, reducing torque‐to‐turn ratios and ensuring consistent clamp loads without rounding—even under high-torque applications.
2. Detailed Application Range
   • Machinery & Equipment Assembly: Secures machine frames, gearboxes, brackets, and precision assemblies where vibration resistance and dimensional stability are critical.
   • Automotive & Heavy Vehicles: Utilized in engine covers, exhaust manifolds, chassis mounts, and accessory brackets—chemical and temperature exposure are well tolerated.
   • Construction & Structural Steelwork: Fastens metal studs, channel struts, railing systems, and architectural panels; ideal for both indoor build-outs and outdoor façade work.
   • Marine, Food & Pharmaceutical Industries: Preferred for sanitary equipment, boat hardware, deck fixtures, and food-grade machinery due to 304’s non-reactive surface and ease of sterilization.
3. Effortless Installation & Operation
   • Standard Inch Sizes & Tooling: Available in all common UNC sizes; fully compatible with standard open-end, box, and socket wrenches, plus torque-controlled power tools for quick, repeatable installations.
   • Self-Aligning Engagement: Rolled threads and precise manufacturing tolerances (ANSI B1.1, ISO 965-2) enable smooth start-up and minimize cross-threading, reducing operator fatigue and rework.
   • Low Friction & Reusability: Smooth mill or light passivation finish reduces galling; nuts can be installed, removed, and reinstalled multiple times without significant loss of performance.
   • Bulk & Kit Packaging: Offered in bulk packs (100–1,000 pcs) or mixed-size assortments, providing fast selection and minimal downtime on diverse job sites.
4. Superior Quality & Long-Term Reliability
   • International Standards & Certification: Manufactured in ISO 9001–certified facilities to ANSI B18.2.2 and ASTM A194 (for grade applications), ensuring dimensional accuracy (±0.1 mm) and mechanical consistency.
   • Rigorous Material & Finish Testing: Each lot is batch-tested for chemical composition (ASTM A568), mechanical properties, and corrosion resistance (ASTM A967 passivation), guaranteeing ≥720 h neutral salt-spray performance.
   • Full Traceability & Compliance: Mill-certified material heat numbers trace from melt to finished nut; RoHS- and REACH-compliant, free from hexavalent chromium and other restricted substances.
   • Long-Term Service Assurance: The combination of alloy purity, precise thread geometry, and robust finish delivers decades of maintenance-free performance under static and dynamic loads.