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Home Product Model 5/16-18*4-1/4 Hex Bolt 18-8 Stainless Steel A4 Marine Grade Fastener
US hexagon socket head cap 5/16-18*4-1/4

Model 5/16-18*4-1/4 Hex Bolt 18-8 Stainless Steel A4 Marine Grade Fastener

5/16-18x4.25 bolt
5/16-18 socket screw
5/16-18 machine screw
5/16-18*4-1/4
5/16-18x4.25 bolt, 5/16-18 socket screw and machine screw for precision fastening applications. Hex head design with full 18-thread count per inch, suitable for industrial equipment, metal construction, and machinery assembly. 4.25-inch length ensures secure fastening in tight spaces.
Categories:Fasteners & Fixings
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Product Description

The 5/16-18x4.25 bolt is a threaded fastener designed for precision assembly in industrial applications, featuring a diameter of 5/16 inches, 18 threads per inch (TPI), and a length of 4.25 inches. Compatible with 5/16-18 socket screws and 5/16-18 machine screws, this component is widely used in machinery, automotive, and construction industries due to its robust threading and reliable tensile strength. It operates effectively under standard temperature ranges (-30°C to 120°C) and withstands moderate to high shear loads. Typical applications include securing structural panels, motor mounts, and heavy-duty equipment. The bolt’s zinc-plated coating enhances corrosion resistance, ensuring durability in harsh environments. While its compact design simplifies installation with common hex keys or wrenches, its smaller thread pitch may limit compatibility with certain materials requiring coarse threading.
Parameter Specification
Thread Size 5/16-18 UNC
Length 4.25 inches
Diameter 0.3125 inches
Threads Per Inch (TPI) 18
Material Grade Grade 5
Head Type Socket Head Cap
Drive Type Hex Socket (3/16")
Thread Type Coarse (UNC)
Finish Zinc Plated
Tensile Strength 120,000 psi
Shear Strength 72,000 psi
Standards Compliance ASME B18.3, SAE J429
question:Can I apply for low-value declaration for shipments?
answer:Yes, low-value declaration is possible for eligible shipments under relevant regulations.
question:Can you provide photos, purchase dates, or info for similar products?
answer:Product photos and basic specifications can be shared, but purchase details remain confidential.
question:Do you offer upgraded or alternative product models?
answer:Yes, we provide upgraded or alternative models based on availability and client requirements.
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:Can I apply for low-value declaration for shipments?
answer:Yes, low-value declaration is possible for eligible shipments under relevant regulations.
question:Can you provide photos, purchase dates, or info for similar products?
answer:Product photos and basic specifications can be shared, but purchase details remain confidential.
question:Do you offer upgraded or alternative product models?
answer:Yes, we provide upgraded or alternative models based on availability and client requirements.
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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