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Home Product Metric external hexagonal bolts M3*40 | Hex Head Cap Screws, Stainless Steel A2-70, DIN933, Automotive, Machinery Applications

Metric external hexagonal bolts M3*40 | Hex Head Cap Screws, Stainless Steel A2-70, DIN933, Automotive, Machinery Applications

metric hex bolt M3x40
M3 external hex bolts 40mm
40mm metric hexagonal screws
Metric external hexagonal bolts M3*40
Metric hex bolt M3x40, M3 external hex bolts 40mm length, 40mm metric hexagonal screws. Zinc-plated for corrosion resistance, precision-engineered threading. Compatible with standard M3 nuts. Ideal for industrial machinery, electronics, and automotive assembly. ISO 4017 compliant.

Product Description

The metric hex bolt M3x40, commonly referred to as M3 external hex bolts 40mm or 40mm metric hexagonal screws, is a precision-engineered fastener designed for high-torque applications. With a nominal diameter of 3mm and 40mm shank length, these steel alloy bolts feature ISO-compliant hexagonal heads compatible with standard 5.5mm wrenches. Rated for tensile strengths up to 8.8 grade, they incorporate corrosion-resistant zinc plating for durability in industrial environments (-30°C to 120°C operating range). Primarily used in machinery assembly, automotive components, and electronic enclosures, their standardized dimensions ensure broad compatibility across modular systems. Key advantages include vibration resistance through precise thread engagement and simplified maintenance via conventional tools, though anti-loosening compounds may be required for extreme dynamic loads. Not applicable to electrical parameters like input/output counts or communication interfaces, as these strictly mechanical fasteners prioritize structural integrity over digital functionality.
Parameter Specification
Product Model M3x40 Metric Hex Bolt
Thread Size M3 (3mm diameter)
Length 40mm
Head Style External Hexagonal
Material Stainless Steel A2-70
Surface Treatment Zinc Plated
Strength Grade Class 8.8
Thread Length Full Thread
Standards ISO 4014, DIN 933
Head Height 2.0mm
Hex Size 5.5mm (Across Flats)
Thread Pitch 0.5mm
question:What is the warranty policy?
answer:Our warranty covers manufacturing defects for one year, including repair or replacement.
question:Can the company ensure stable supply?
answer:Yes, we maintain efficient supply chains and sufficient inventory to meet demands promptly.
question:What payment methods are supported?
answer:We accept TT, PayPal, and major credit cards. Contact us for other options.
question:Can the company ensure stable product supply?
answer:Yes, we maintain long-term partnerships and strict inventory management.
question:Why is there a transaction fee?
answer:The fee covers payment processing and administrative costs for secure transactions.
question:What is the warranty policy?
answer:Our warranty covers manufacturing defects for one year, including repair or replacement.
question:Can the company ensure stable supply?
answer:Yes, we maintain efficient supply chains and sufficient inventory to meet demands promptly.
question:What payment methods are supported?
answer:We accept TT, PayPal, and major credit cards. Contact us for other options.
question:Can the company ensure stable product supply?
answer:Yes, we maintain long-term partnerships and strict inventory management.
question:Why is there a transaction fee?
answer:The fee covers payment processing and administrative costs for secure transactions.
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