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Home Product Model 1/4-20-3-3/4 Steel Hex Bolt, Zinc-Plated, Grade 5, Automotive Fastener
US hexagon socket head cap 1/4-20-3-3/4

Model 1/4-20-3-3/4 Steel Hex Bolt, Zinc-Plated, Grade 5, Automotive Fastener

1/4-20 Socket Head Screw
3-3/4 Inch Fastener Bolt
Hex Drive Machine Screw
1/4-20-3-3/4
1/4-20 Socket Head Screw, 3-3/4 Inch Hex Drive Machine Bolt Fastener with Full Threads for Industrial Assembly and Machinery Applications.
Categories:Fasteners & Fixings
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Product Description

The 1/4-20 Socket Head Screw is a precision-engineered 3-3/4 Inch Fastener Bolt with a hex drive machine screw design, ideal for high-torque industrial applications. Featuring a 1/4-inch nominal diameter and 20 threads per inch, this machine screw provides a secure fit in mechanical assemblies, automotive components, or heavy machinery. Its 3-3/4-inch length offers extended reach for structural fastening, while the hex drive (Allen key) compatibility ensures easy installation in confined spaces. Constructed from grade-5 hardened steel, it operates reliably in temperatures ranging from -40°F to 450°F (-40°C to 232°C) and resists corrosion in harsh environments. Key advantages include high tensile strength (120,000 PSI) and durability, though its threaded length may require pre-drilled pilot holes. Common in aerospace, construction, and equipment manufacturing industries.
ParameterSpecification
Thread Size1/4-20 UNC
Length3-3/4 Inch (3.75")
Head StyleSocket Head
Drive TypeHex Drive (1/4" Hex Key)
MaterialAlloy Steel
FinishZinc Plated
Strength GradeGrade 8
Thread Pitch20 TPI
Head Diameter0.531 Inch
Head Height0.218 Inch
Torque Requirement7-9 ft-lbs
Compliance StandardSAE J429
Thread EngagementFull Thread
question:Why is shipping cost high? Any cheaper options?
answer:Shipping costs reflect fuel and carrier fees. We offer economy options like sea/land freight for savings.
question:What is the warranty policy?
answer:Products include a 1-year warranty covering defects. Contact support with order details for claims.
question:Do you accept payment after delivery?
answer:Standard terms require prepayment. Flexible payment terms can be negotiated for trusted partners.
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:Why is shipping cost high? Any cheaper options?
answer:Shipping costs reflect fuel and carrier fees. We offer economy options like sea/land freight for savings.
question:What is the warranty policy?
answer:Products include a 1-year warranty covering defects. Contact support with order details for claims.
question:Do you accept payment after delivery?
answer:Standard terms require prepayment. Flexible payment terms can be negotiated for trusted partners.
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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