DIN557 Square Nut Specifications
Parameter | Details |
Product Name | DIN557 Class C Square Nut, Four-sided Fastening Nut |
Standard | DIN557 German Industrial Standard (Class C Coarse Thread) |
Material & Grade | Carbon Steel: Grade 4.8; Stainless Steel: A2-70(304), A4-80(316) |
Structural Feature | Square Anti-rotation Structure, Large Bearing Area, Embedded Slot Installation |
Surface Finish | Electro-galvanized Zinc, Black Oxide, Hot-dip Galvanized, Stainless Steel Passivation |
Size Range | Conventional M5-M16 In Stock, M4/M20/M24 Customizable |
Core Advantage | Slot Anti-rotation, Stable Clamping Force, High Assembly Efficiency, Deformation Resistant |
Application | Aluminum Profile Frame, Sheet Metal Equipment, Light Machinery, Agricultural Machinery, Jigs & Fixtures |
Certification | ISO9001, Material Test Report, Dimensional Inspection, Salt Spray Test, Batch QC Certificate |
Package | Standard Export Carton & Pallet, Neutral Packaging & OEM Service |
Delivery Time | 3-7 days for stock sizes, 15-20 days for bulk customized orders |
DIN557 Product Core Advantages
Built-in Anti-rotation Function
Different from traditional hex nuts, DIN557 square nuts adopt integrated square structure, which can be embedded into profile chutes and sheet metal limit slots. It realizes automatic limit positioning during installation, effectively preventing nut idling and slipping without additional anti-loosening parts, greatly improving assembly efficiency.
Larger Bearing Surface & Stable Fastening
The flat square end provides larger contact force area, uniform stress distribution and no local stress concentration. It maintains stable clamping force under static fastening and slight vibration conditions, avoiding loosening and deformation, improving overall equipment assembly stability.
Strong Universal Compatibility
Manufactured in strict accordance with DIN557 standards, the thread is fully compatible with metric standard bolts and screw rods. It can be used for both embedded slot installation and ordinary plane fastening, combining professional applicability and universal versatility to meet diverse working condition needs.
Cost-effective & Bulk Applicable
Mature mass production ensures high cost performance of carbon steel models, very suitable for large-scale supporting of light industrial equipment and profile frames. Stainless steel versions provide excellent anti-rust and anti-corrosion performance for long-term outdoor and humid environment use.
Carbon Steel Galvanized DIN557 Nut (General Bulk Type)
Made of high-quality carbon steel with moderate hardness and stable structure. Electro-galvanized surface provides good anti-rust performance and ultra-high cost performance. Widely used for profile frames, indoor sheet metal equipment, light machinery and agricultural equipment, ideal for foreign trade wholesale and domestic engineering supporting.
Carbon Steel Black Oxide DIN557 Nut (Precision Equipment Type)
Blackening treatment improves surface hardness and wear resistance with matte and delicate appearance. Suitable for precision jigs, small mechanical equipment and instrument frame assembly, meeting high requirements for appearance and wear resistance of industrial accessories.
304 Stainless Steel DIN557 Nut A2-70 (General Anti-corrosion Type)
Authentic 304 stainless steel features oxidation resistance and moisture corrosion resistance. It adapts to outdoor profile equipment, garden machinery and humid workshop assembly, maintaining stable fastening performance without rusting or deformation for long-term service.
316 Stainless Steel DIN557 Nut A4-80 (High-end Anti-corrosion Type)
316 molybdenum-containing stainless steel has superior salt spray and acid-base corrosion resistance, suitable for coastal salt spray, chemical mild corrosion and other harsh working conditions. It is widely used in high-end outdoor equipment and marine light-duty mechanical supporting.
DIN557 VS Hex Nut Difference
Standard Hex Nut: Designed with hexagonal structure, no anti-rotation limit function, easy to slip in slot installation, only suitable for general plane fastening scenarios.
DIN557 Square Nut: Exclusive square structure with built-in limit anti-rotation function, larger bearing area and higher assembly stability. Specially customized for profile chute and sheet metal slot embedded installation.
Production Process
Graded Material Selection: Classify raw materials by steel grade to ensure stable mechanical properties and consistent batch quality.
Automatic Cold Heading Forming: One-piece cold heading forming ensures regular square shape, flat end surface and accurate size without defects.
Precision Tapping: Standard full-profile thread ensures smooth meshing and perfect compatibility with standard bolts.
Deburring & Finishing: Fine polishing of all edges ensures smooth surface and no scratching damage to workpieces.
Custom Anti-corrosion Treatment: Multiple surface finishes meet different rust-proof and weather resistance requirements.
Full-batch Inspection: Strict dimensional, thread and appearance inspection with complete factory certification reports.
Application Industries
Aluminum Profile Frame Industry: Embedded anti-rotation fastening for industrial profile frames and assembly lines.
Sheet Metal Equipment: Limit fixing for chassis, cabinet and equipment baffle slots.
Light Industrial Machinery: Supporting fastening for small processing equipment and auxiliary automation equipment.
Agricultural Machinery: Structural fastening for garden machinery and outdoor light-duty equipment.
Jigs & Fixtures: Auxiliary fixing for testing tools and positioning fixtures.
General Mechanical Assembly: Stable fastening for various light-duty mechanical equipment.
Why Choose Our DIN557 Square Nuts
We specialize in the production of German standard fasteners, focusing on mass supply of DIN557 Class C square nuts. Our full product range covers carbon steel galvanized/black oxide and 304/316 stainless steel grades. Manufactured strictly according to DIN557 standards, our square nuts feature regular size, precise thread and excellent anti-rotation effect. With larger bearing area and higher assembly efficiency than ordinary hex nuts, they are professional accessories for profile and sheet metal slot installation. Sufficient stock and customized services are available to provide reliable embedded fastening solutions for global industrial customers.
If you are looking for high-quality DIN557 square nuts, carbon steel four-sided nuts and stainless steel anti-corrosion square fastening nuts, feel free to contact us for professional technical support and accurate quotation.
