A core fastener for international mechanical assembly, this stainless steel hex socket knurled head screw combines seamless global standard compatibility with excellent performance in harsh environments. Fully compliant with DIN912 and ISO 4762:1997, it also meets DIN 912 and ASME B18.3 standards, facilitating cross-border procurement for machinery, automotive, marine, and industrial automation while optimizing supply chain efficiency and reducing assembly downtime.
Made from high-quality SUS304 (A2-70) or SUS316 (A4-70) stainless steel, it offers outstanding corrosion resistance, ideal for outdoor structures, chemical plants, offshore platforms, and coastal power installations. The precision knurled cylindrical head enhances manual torque efficiency without compromising the compact structure, perfect for flush installations or tight spaces such as CNC machines, industrial robots, and precision fixtures. Cold-forging, precision threading, and passivation ensure dimensional consistency, clear thread profiles, and strict adherence to Class A tolerances. The hex drive allows high torque transfer with minimal slippage, improving both automated assembly and manual maintenance.
Available in full- or partial-thread configurations, sizes range from M1.6 to M64, supporting applications from lightweight electronics to heavy machinery. Its stainless steel construction ensures long-term durability in humid, corrosive, or temperature-variable environments, reducing maintenance and replacement costs. Compliant with GB/T 3098.6 and ISO 3506-1 standards, each screw is clearly marked for easy identification of material grade and performance. For global buyers seeking reliable, cost-effective fasteners that bridge regional standard differences, the GB70.1-2000 stainless steel hex socket knurled head screw guarantees assembly integrity, operational safety, and supply chain efficiency.
| Category | Specification / Parameter |
|---|---|
| Standard & Compatibility | ISO 4762:1997; Direct replacement for DIN 912 (Germany) & ASME B18.3 (USA); Cross-border compatibility |
| Thread Size & Pitch | M1.6 – M64; ISO 68-1 coarse thread; Pitch 0.35mm (M1.6) – 6mm (M64) |
| Length (Rod) | 4mm – 200mm; Available in full-thread (ISO 8673) & half-thread |
| Material | SUS304 (A2-70): Cr≥18%, Ni≥8%, Neutral salt spray ≥48h SUS316 (A4-70): Mo≥2%, Chloride corrosion resistance 3× higher, Neutral salt spray ≥100h |
| Mechanical Performance | A2-70: Tensile ≥700MPa, Yield ≥450MPa A4-70: Tensile ≥700MPa, Yield ≥450MPa, Elongation ≥12% |
| Head Design | Cylindrical knurled head; Straight or diamond pattern (customizable); Pitch 0.4–1.2mm; Head diameter 1.5–2.2× rod diameter |
| Hex Drive | Width across flats: 1.5mm (M1.6) – 14mm (M64); Socket depth 0.8–1.2× rod diameter; Ensures torque transfer & tight fit |
| Surface Finish | Passivated; Surface roughness Ra ≤0.8μm; Burr-free, crack-free |
| Thread Accuracy | Class 6g |
| Grade & Tolerance | Class A; Head-to-rod coaxiality ≤0.2mm (M1.6–M10), ≤0.3mm (M12–M64); Dimensional tolerances per GB/T 3103.1-2002 (6H/6g) |
| Weight Range | 0.02g (M1.6×4) – 1580g (M64×200) |
| Packaging | Single piece, bulk box (100 pcs/box, 500 pcs/box), or custom packaging |
| Compliance | RoHS certified; Lead & cadmium free; REACH compliant |
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