Stainless Steel Socket Cap Screw — ISO 4762 Stainless

Description

1. Product OverviewThe Stainless Steel Socket Cap Screw — ISO 4762 Stainless is a fully threaded metric fastener with a hexagonal internal socket drive, engineered to meet the strict dimensional and mechanical requirements of ISO 4762. It is primarily used in machine construction, plant engineering, precision equipment, and industrial clamping applications where corrosion resistance, vibration stability, and clean aesthetics are critical. The key value proposition lies in its A2-70 (18-8/SUS 304) or A4-70 (SUS 316) stainless steel grade, delivering 700 MPa tensile strength, excellent corrosion resistance, and long-term durability without galvanic contamination. Strategically, this screw is essential for enterprises sourcing high-reliability fasteners for export-grade machinery, food-processing equipment, chemical plants, and marine environments, where failure costs far exceed initial unit price.

2. Key Specifications & Technical Characteristics

• Material/Chemical Composition: A2 Stainless Steel (18-8 / SUS 304) per ISO 3506-1; optional A4 (SUS 316) for superior corrosion resistance

• Grade: A2-70 (minimum tensile strength 700 MPa); A4-70 available

• Physical Characteristics:

  • Form: Fully threaded hex socket head cap screw (Allen key drive)

  • Head Style: Cup head with internal 6-mm hex socket (size varies by diameter)

  • Surface Finish: Polish + passivation (ASTM A380); clear, bright finish

  • Thread Fit: Class 6g per ISO 724 / ISO 965-1

  • Size Range: M2 to M42 (metric); 1/8″ to 1″ (imperial)

• Packaging Options: Bulk loose in woven bags, carton boxes, or wooden pallets; custom labeling available

• Shelf Life: Indefinite when stored dry; passivated surface resists oxidation for 10+ years

3. Core Industrial Applications

   Primary Industry	Specific Use Case	Performance Advantage
   Machine & Plant Construction	Securing gearboxes, motor mounts, conveyor frames	70,000 psi tensile strength; vibration-resistant hex socket drive
   Food & Beverage Processing	Pump housings, mixing tanks, conveyor systems	A2/A4 stainless resists chlorides & acids; no rust contamination
   Chemical & Petroleum	Valve assemblies, pipeline flanges, reactor fixtures	Superior corrosion resistance vs. carbon steel; passivated surface
   Marine & Offshore	Deck equipment, thruster mounts, saltwater-exposed fixtures	A4-70 grade withstands marine environment; no galvanic corrosion
   Electronics & Precision Instruments	Enclosure fastening, sensor mounts, optical frames	Clean bright finish; non-magnetic (A2); no surface spalling

Performs better than alternatives due to: 2–3× longer service life in corrosive environments, 40% lower lifecycle cost than plated steel, and zero maintenance for rust removal.

4. Competitive Advantages

• Quality Consistency: 100% ISO 3506-1 & ISO 4762 compliant; manufacturer ID + “A2-70” marked on M5+ sizes

• Supply Reliability: 20 MT monthly capacity; 98% on-time delivery rate for bulk orders

• Logistics Capability: 18 MT per 40′ HC container; FOB/CIF terms; global shipping via DHL/FCL

• Price Competitiveness: 15–20% below European premium brands; volume discounts for 20+ MT orders

• Sustainability: RoHS 3 & REACH compliant; passivation uses non-toxic processes; recyclable material

• Technical Support: Full dimension drawings, mechanical property sheets, and salt-spray test reports (12H–1600H) provided

5. Commercial & Supply Information

• Minimum Order Quantity (MOQ): 1 MT (trial); BULK MOQ: 20 MT

• Loading Capacity: 18 MT per 40′ High Cube container

• Lead Time: 7–10 days for 20 MT; custom sizes +14 days

• Payment Terms: 30% T/T advance, 70% against B/L; L/C at sight accepted for 50+ MT