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Home Product Model M8*85 Partially Threaded Hex Bolt Automotive Machinery Fastener
Half thread external hexagonal bolt M8*85

Model M8*85 Partially Threaded Hex Bolt Automotive Machinery Fastener

Half Thread Hex Bolt M8x85
M8x85 External Hex Bolt
Half Thread M8x85 Hex Bolt
Half thread external hexagonal bolt M8*85
Half Thread Hex Bolt M8x85: High-strength, zinc-plated external hex bolt with partial threading for secure fastening in structural and mechanical applications. Also known as M8x85 External Hex Bolt or Half Thread M8x85 Hex Bolt, made from corrosion-resistant steel.
Categories:Fasteners & Fixings
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Product Description

The Half Thread Hex Bolt M8x85 (M8x85 External Hex Bolt) is a partially threaded fastener designed for secure assembly in high-load applications. This Half Thread M8x85 Hex Bolt features an 8mm nominal diameter and 85mm shank length, with a hex head requiring a 13mm wrench for installation. The threaded portion covers approximately half the shank length (42.5mm), providing optimized grip strength while reducing thread wear. Constructed from grade 8.8 steel with zinc-plated anti-corrosion coating, it operates reliably in temperatures from -30°C to +120°C. Widely used in heavy machinery, structural engineering, and automotive manufacturing, this bolt combines 800MPa tensile strength with vibration resistance. Key advantages include reduced cross-threading risk and improved shear resistance compared to fully threaded counterparts, though precise alignment is required during installation. The partial threading design minimizes material contact points while maintaining clamping force integrity.
Parameter Specification
Product Model Half Thread Hex Bolt M8x85, M8x85 External Hex Bolt, Half Thread M8x85 Hex Bolt
Diameter M8 (8mm)
Length 85mm
Thread Length ~30mm (Partial Thread)
Material Grade 8.8 Carbon Steel
Strength Class ISO 898-1 Class 8.8
Surface Treatment Zinc Plated (RoHS Compliant)
Hex Size 13mm (Wrench Size)
Standard DIN 933 / ISO 4014
Thread Type Metric Coarse (1.25mm Pitch)
Head Type External Hexagon Head
Application Machinery, Automotive, Structural Fastening
Torque Value 22-24 Nm (Dry Steel-to-Steel)
Packaging 100pcs/box
question:Does the company have a professional product selection engineering team?
answer:Yes, we have a skilled engineering team specialized in product selection and optimization.
question:Can shipments apply for low-value declaration?
answer:Low-value declaration is possible for eligible shipments, subject to destination country regulations.
question:What is the warranty policy?
answer:Products carry a 12-month warranty covering manufacturing defects, starting from the delivery date.
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:Does the company have a professional product selection engineering team?
answer:Yes, we have a skilled engineering team specialized in product selection and optimization.
question:Can shipments apply for low-value declaration?
answer:Low-value declaration is possible for eligible shipments, subject to destination country regulations.
question:What is the warranty policy?
answer:Products carry a 12-month warranty covering manufacturing defects, starting from the delivery date.
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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