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Home Product Model 1/4-20*4-1/4 Pan Head Machine Screw Stainless Steel Heavy Duty DIY Fastener
US hexagon socket head cap 1/4-20*4-1/4

Model 1/4-20*4-1/4 Pan Head Machine Screw Stainless Steel Heavy Duty DIY Fastener

1/4-20x4.25 Machine Screw
1/4-20 UNC Hex Bolt
4.25 Inch 1/4-20 Screw
1/4-20*4-1/4
1/4-20 UNC Hex Bolt, 4.25 Inch 1/4-20 Screw with coarse threads. Durable zinc-plated steel machine screw for industrial applications. 1/4-20x4.25 Machine Screw suitable for fastening machinery, equipment, and structural assemblies. Fully threaded hex head bolt meets ANSI/ASME standards.
Categories:Fasteners & Fixings
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Product Description

The 1/4-20x4.25 Machine Screw, compliant with 1/4-20 UNC Hex Bolt specifications, is a precision-engineered 4.25-inch threaded fastener designed for robust mechanical applications. This screw features a 1/4-inch diameter with 20 threads per inch (UNC standard), hex head design for secure torque application, and a total length of 4.25 inches. Manufactured from high-strength steel with optional corrosion-resistant coatings, it operates reliably in temperatures ranging from -40°F to 450°F (-40°C to 232°C). Ideal for industrial machinery, automotive assemblies, and structural frameworks, this fastener excels in environments requiring vibration resistance and load-bearing durability. Key advantages include superior tensile strength, compatibility with standard hex wrenches, and long-term reliability under moderate stress conditions, though it is not recommended for extreme dynamic loads. The zinc-plated variant offers enhanced protection against oxidation, making it suitable for outdoor or humid installations.
Parameter Specification
Thread Type 1/4-20 UNC
Nominal Diameter 1/4 inch (0.250")
Threads Per Inch 20
Length 4.25 inches
Head Style Hex Bolt (External Drive)
Material Steel (Grade 2)
Surface Finish Zinc Plated (Type B)
Tensile Strength 74,000 psi min
Drive Size 7/16" Hex
Compliance Standard ASTM A307 / ASME B18.2.1
Thread Engagement Fully Threaded
Application General Machinery Assembly
Torque Range 6-8 ft-lbs (Dry)
question:Can your company ensure stable supply?
answer:We maintain multiple suppliers and strategic inventory to guarantee stable product availability.
question:Why can other suppliers provide discontinued models you can't offer?
answer:Different suppliers may source from alternate inventory channels. We focus on current models with reliable support.
question:Why is shipping expensive? Any cheaper options available?
answer:Shipping costs vary by service level. We offer economical options for non-urgent shipments upon request.
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 your company ensure stable supply?
answer:We maintain multiple suppliers and strategic inventory to guarantee stable product availability.
question:Why can other suppliers provide discontinued models you can't offer?
answer:Different suppliers may source from alternate inventory channels. We focus on current models with reliable support.
question:Why is shipping expensive? Any cheaper options available?
answer:Shipping costs vary by service level. We offer economical options for non-urgent shipments upon request.
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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