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Home Product 1/4-20x1-3/8 Hex Drive Fastener, Stainless Steel Machine Bolt, Grade 8 Heavy-Duty Threaded Screw
US hexagon socket head cap 1/4-20*1-3/8

1/4-20x1-3/8 Hex Drive Fastener, Stainless Steel Machine Bolt, Grade 8 Heavy-Duty Threaded Screw

1/4-20 bolts 1-3/8
1/4-20x1-3/8 screws
1-3/8 inch 1/4-20 fasteners
1/4-20*1-3/8
1/4-20 bolts 1-3/8, 1/4-20x1-3/8 screws, and 1-3/8 inch 1/4-20 fasteners with coarse threads for secure assembly. Zinc-plated steel construction ensures corrosion resistance. Compatible with nuts and anchors in machinery, automotive, and construction applications.
Categories:Fasteners & Fixings
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Product Description

These 1/4-20 bolts 1-3/8 are precision-engineered fasteners designed for robust mechanical applications in automotive, construction, and industrial assembly. Measuring 1-3/8 inches in length with a 1/4-20 thread pattern, these 1/4-20x1-3/8 screws feature zinc-plated steel construction for corrosion resistance and tensile strength up to 120,000 PSI. They operate effectively in temperatures ranging from -40°F to 250°F (-40°C to 121°C), supporting secure fastening in machinery, electrical enclosures, and structural frameworks. Ideal for medium-duty loads, these 1-3/8 inch 1/4-20 fasteners offer simplified installation with standard hex-drive compatibility while maintaining vibration resistance. Their compact design suits space-constrained applications but requires proper torque calibration to prevent thread stripping. Surface-treated variants are available for high-moisture environments.
Parameter Specification
Thread Size 1/4-20 UNC
Threads Per Inch 20 TPI
Nominal Diameter 0.25" (1/4 inch)
Shank Length 1.375" (1-3/8 inch)
Head Style Hex/Socket/Cap (varies by type)
Drive Type Phillips/Slotted/Hex
Material Grade Grade 2/5/8 (carbon steel)/18-8 SS
Tensile Strength 60,000 - 150,000 PSI
Surface Treatment Zinc Plated/Black Oxide/Plain
Thread Engagement Minimum 0.5x diameter
Torque Value 4-12 lb-ft (material dependent)
Standards Compliance ASME B18.2.1/SAE J429
question:Does the company offer technical selection services?
answer:Yes, we provide comprehensive technical selection support and guidance.
question:Does the company have a professional product selection engineering team?
answer:Yes, our expert engineering team specializes in product selection and optimization.
question:Can the company assist with product customization requests?
answer:Yes, we offer tailored customization services to meet specific 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:Does the company offer technical selection services?
answer:Yes, we provide comprehensive technical selection support and guidance.
question:Does the company have a professional product selection engineering team?
answer:Yes, our expert engineering team specializes in product selection and optimization.
question:Can the company assist with product customization requests?
answer:Yes, we offer tailored customization services to meet specific 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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