Product Parameter Specifications
Parameter | Details |
Product Name | ISO 7043 Hex Flange Nylon Insert Lock Nut |
Standard | ISO 7043:2012 |
Precision Grade | Class A (M5-M16), Class B (M20) |
Thread Size | M5, M6, M8, M10, M12, M14, M16, M20 |
Strength Class | Class 8, Class 10 |
Structure | Integrated flange face + nylon insert locking structure |
Material | Carbon steel, 304/316 stainless steel |
Surface Finish | Zinc plated, color zinc, black oxide, passivation |
Key Features | Washer-free installation, high efficiency, anti-vibration, stable locking |
Applications | Auto parts, agricultural machinery, sheet metal & general equipment assembly |
Quality Control | Dimensional tolerance, thread inspection, nylon insert fitting, locking torque test |
Supply Capacity | Sufficient stock, fast bulk export delivery, customized finishes available |
Core Product Advantages
Integrated flange design simplifies assembly
Built-in widened flange bearing surface eliminates the need for extra flat washers, reducing accessory types and assembly procedures. The flange evenly distributes pressing force to prevent deformation or damage of thin sheet metal workpieces, ideal for lightweight equipment assembly scenarios.
High-quality nylon insert tightly wraps the thread after bolt penetration, generating stable friction preload torque. It effectively reduces the risk of nut loosening under continuous vibration, delivering more reliable anti-loosening effect than ordinary washer combinations.
Standard precision with wide compatibility
Manufactured strictly in accordance with ISO international standards with graded A/B precision. Standard thread pitch ensures smooth mating with all metric bolts, featuring strong universality for equipment replacement and foreign trade supporting projects.
Multiple materials & finishes for diverse scenarios
High-strength carbon steel suits conventional heavy-load assembly for automobiles and agricultural machinery; stainless steel provides excellent rust and corrosion resistance for humid outdoor environments. Various surface treatments balance appearance and weather resistance.
Compact structure for narrow installation space
Integrated flange and nut body features compact size, smaller than traditional nut and washer combinations. It adapts to narrow installation positions such as equipment frames and chassis interiors, supporting equipment lightweight design.
Production Process
Material Selection: High-quality carbon steel and stainless steel with uniform texture to ensure structural stability and mechanical strength.
Cold Heading Forming: Multi-station precision cold forging forms hex body and flat flange in one piece with standard dimensional tolerance.
Precision Tapping: CNC threading ensures full standard thread profile, inspected by thread gauges for smooth and accurate mating.
Nylon Insert Pressing: Professional equipment ensures firm and centered nylon insert installation for stable locking torque.
Heat Treatment: Quenching and tempering for high-strength grades to balance hardness and toughness for daily heavy-load fastening.
Anti-corrosion Treatment: Electroplating, black oxide and passivation processes enhance rust and oxidation resistance.
Batch Inspection: Strict testing of dimension, thread accuracy, locking torque and insert firmness to guarantee stable batch quality.
Application Industries
Automotive Parts: Anti-loosening fastening for chassis accessories, body sheet metal and vehicle equipment under vibration.
Agricultural Machinery: Frame and transmission component assembly for harvesters and seeders, adapting to field vibration conditions.
Sheet Metal & Cabinet Equipment: Fastening of electrical control cabinets and equipment housings to avoid thin plate damage.
General Machinery: Anti-loosening connection for automation equipment, small heavy machinery and conventional frames.
Overseas Engineering Supporting: Compliant with ISO standard drawings, supporting foreign equipment assembly and standard part supply projects.
Installation & Usage Notes
1. Working condition adaptation: Nylon insert structure is suitable for normal temperature environments only. Not recommended for high temperature, open flame and strong corrosion scenarios to avoid insert failure.
2. Standard assembly operation: Tighten evenly during installation to prevent nylon insert damage and peeling caused by forced screwing.
3. Reuse reminder: Nylon clamping force may slightly attenuate after repeated disassembly. Replace with new nuts for safety-critical connections.
4. Matching standard bolts: Suitable for standard metric coarse thread bolts to ensure accurate thread matching and avoid thread wear.
5. Clean contact surface: Remove burrs and impurities before installation to ensure full flange fitting and uniform stress bearing.
Why Choose Our ISO 7043 Lock Nuts
We specialize in manufacturing ISO 7043 hex flange nylon insert lock nuts in strict accordance with ISO 7043:2012 international standards. With clear A/B precision classification, flat flange surface, accurate thread and stable locking torque, our products deliver reliable washer-free anti-vibration performance for automobile, agricultural machinery and sheet metal equipment. Sufficient regular stock supports fast bulk export delivery. Complete quality inspection documents are available to serve global equipment supporting projects.
For high-quality ISO7043 flange lock nuts and customized fastener solutions, please contact our team for professional quotations and technical support.
