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Home Product 1/4-20*3/4 Hex Socket Set Screw Alloy Steel Fastener High-Torque Machinery Hardware
US hexagon socket head cap 1/4-20*3/4

1/4-20*3/4 Hex Socket Set Screw Alloy Steel Fastener High-Torque Machinery Hardware

1/4-20x3/4 machine screw
1/4-20 hex bolt
UNF threaded fastener
1/4-20*3/4
1/4-20x3/4 machine screw and 1/4-20 hex bolt, UNF threaded fastener designed for machinery, equipment, and precision assembly. Offers high-strength performance with 3/4-inch length for secure fastening in industrial applications.
Categories:Fasteners & Fixings
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Product Description

The 1/4-20x3/4 machine screw is a precision-engineered UNF threaded fastener designed for robust mechanical assemblies requiring high tensile strength. This 1/4-20 hex bolt features a 3/4-inch shaft length with Unified National Fine (UNF) threading for secure, vibration-resistant connections in industrial equipment, automotive frameworks, and aerospace components. Crafted from grade-5 steel or corrosion-resistant stainless steel, it operates reliably in temperatures from -40°C to 120°C. The hexagonal head enables easy installation with standard 6-point wrenches or sockets, while its UNF thread profile ensures compatibility with industrial-grade nuts and tapped holes. Ideal for structural applications demanding shear strength and durability, this fastener supports load-bearing systems but requires torque-limiting tools to prevent over-tightening. Surface treatments like zinc plating or black oxide enhance wear resistance in harsh environments.
Parameter Specification
Type 1/4-20x3/4 Machine Screw & Hex Bolt (UNF Threaded Fastener)
Thread Size 1/4" Diameter
Threads Per Inch 20 TPI
Length 3/4" (Under Head)
Thread Specification UNF (Unified National Fine)
Head Style Hexagonal
Head Width 7/16" Across Flats
Thread Length Fully Threaded
Material & Finish Steel, Zinc Plated
Drive Type External Hexagon Drive
Thread Direction Right-Hand
Hardness Grade 5 Equivalent
Torque Capacity 20-25 lb-ft (Dry)
question:Can the company ensure stable supply?
answer:Yes, we maintain reliable supply chains and rigorous quality control to ensure consistent product availability.
question:Why is the shipping cost high? Are there more cost-effective options?
answer:Costs vary by weight, destination, and speed. We offer economy shipping and can negotiate rates for bulk orders.
question:What payment methods do you accept?
answer:We accept T/T, L/C, PayPal, and major credit cards for secure and flexible transactions.
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 the company ensure stable supply?
answer:Yes, we maintain reliable supply chains and rigorous quality control to ensure consistent product availability.
question:Why is the shipping cost high? Are there more cost-effective options?
answer:Costs vary by weight, destination, and speed. We offer economy shipping and can negotiate rates for bulk orders.
question:What payment methods do you accept?
answer:We accept T/T, L/C, PayPal, and major credit cards for secure and flexible transactions.
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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