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Home Product 3/8-16x1-1/4 Hex Bolt, Grade 8 Steel, Zinc Plated, Heavy Duty Fastener for Automotive Machinery
US hexagon socket head cap 3/8-16*1-1/4

3/8-16x1-1/4 Hex Bolt, Grade 8 Steel, Zinc Plated, Heavy Duty Fastener for Automotive Machinery

3/8-16 hex bolt
1-1/4 inch screws
3/8-16 cap screw
3/8-16*1-1/4
3/8-16 hex bolt and 3/8-16 cap screw in 1-1/4 inch length, featuring a hexagonal head design for machinery assembly and industrial fastening. Durable steel construction with corrosion-resistant coating, suitable for high-torque applications. Includes 1-1/4 inch screws with precision threads.
Categories:Fasteners & Fixings
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Product Description

The 3/8-16*1-1/4 hex bolt is a precision-engineered 1-1/4 inch screw designed for heavy-duty fastening applications in industrial assembly, automotive, and construction sectors. This 3/8-16 cap screw features a coarse threaded shank with a hex head configuration, optimized for secure torque transmission using standard wrenches. Its carbon steel construction provides a tensile strength of 120,000 PSI, rated for operating temperatures between -20°F to 300°F (-29°C to 149°C). The zinc-plated finish enhances corrosion resistance in humid or outdoor environments. With a nominal thread engagement length of 1.25 inches, it ensures reliable mechanical bonding in structural joints, machinery frames, or metal fabrication. While offering high shear resistance and vibration tolerance, this fastener requires proper torque calibration to prevent over-tightening. Compatible with 3/8-16 nuts and threaded inserts, it serves as a critical component in load-bearing systems where dimensional accuracy (±0.005") and uniform stress distribution are paramount.
Parameter Specification
Thread Size 3/8-16
Length 1-1/4 inch
Head Style Hex
Drive Type Hex Key
Material Stainless Steel/Alloy Steel
Strength Grade Grade 5/Class 8.8
Surface Finish Zinc Plated/Plain
Standard SAE J429/ASTM A325
Application Machinery Assembly
question:Can you provide shipment photos and purchase dates for similar products?
answer:Yes, upon request. Please contact our sales team for specific details and documentation.
question:Is low-value declaration possible for shipments?
answer:Yes, subject to destination customs regulations. Provide shipping details for confirmation.
question:Why can other suppliers source discontinued models you can't?
answer:Suppliers may use alternative channels, refurbished stock, or non-genuine parts. We prioritize authenticity and reliability.
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 you provide shipment photos and purchase dates for similar products?
answer:Yes, upon request. Please contact our sales team for specific details and documentation.
question:Is low-value declaration possible for shipments?
answer:Yes, subject to destination customs regulations. Provide shipping details for confirmation.
question:Why can other suppliers source discontinued models you can't?
answer:Suppliers may use alternative channels, refurbished stock, or non-genuine parts. We prioritize authenticity and reliability.
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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