1/4" x 3/4" Hex Bolt: High-Strength Fastening Solution for Industrial Applications
In the demanding world of industrial assembly and construction, the integrity of every connection is paramount. The 1/4 x 3 4 hex bolt stands as a fundamental component in this ecosystem, offering a reliable and robust fastening solution for a multitude of heavy-duty applications. Engineered to meet rigorous standards, this hex head cap screw provides superior clamping force, excellent shear strength, and dependable performance in challenging environments. This product page details the specifications, features, and advantages of our premium-grade hex bolts, designed for professionals who prioritize quality and durability in their projects.
Product Overview
Our 1/4 x 3/4 hex bolt is a standard hex head cap screw characterized by a 1/4-inch nominal diameter and a 3/4-inch shank length under the head. It features a hexagonal head designed for wrenching with common tools like socket sets, wrenches, and ratchets, allowing for high torque application and secure fastening. Manufactured from high-grade materials and available in various finishes and grades, this bolt is a versatile workhorse suitable for machinery, structural frameworks, automotive assemblies, and general fabrication where strength and reliability are non-negotiable.
Key Features
- High-Grade Material: Fabricated from alloy steel or stainless steel, providing excellent tensile strength and resistance to deformation.
- Precision Threading: Uniform, clean-cut UNC (Coarse) or UNF (Fine) threads ensure smooth engagement with nuts and tapped holes, reducing the risk of cross-threading.
- Hexagonal Head Design: Allows for easy access and high-torque tightening with standard tools, even in confined spaces.
- Durable Finishes: Available in zinc plating, hot-dip galvanizing, or plain finishes for corrosion resistance tailored to specific environmental conditions.
- Full Traceability: Manufactured in compliance with international standards such as ASTM, SAE, and ISO, ensuring consistent quality and performance.
Technical Specifications
| Parameter | Specification |
|---|---|
| Product Name | Hex Head Cap Screw / Hex Bolt |
| Size | 1/4" x 3/4" (Diameter x Length) |
| Thread Pitch | 20 UNC (Standard Coarse) or 28 UNF (Fine) |
| Head Style | Hexagon (Hex) |
| Drive Type | Wrench Flat (7/16" across flats) |
| Common Grades | Grade 5, Grade 8, ASTM A307, 18-8 Stainless Steel |
| Material | Medium Carbon Steel, Alloy Steel, Stainless Steel 304/316 |
| Finish | Zinc Plated, Hot-Dip Galvanized, Plain, Black Oxide |
| Standards | ASTM A449, SAE J429, ASME B18.2.1, ISO 4014/4017 |
| Proof Load (Grade 5) | ~4,250 lbs |
Application Scenarios
The versatility of the 1 4 x 3 4 hex bolt makes it indispensable across numerous sectors. Its primary function is to join two or more components, typically with a nut or into a tapped hole, under significant load.
- Machinery & Equipment: Assembly of frames, guards, panels, and components in industrial machinery, agricultural equipment, and conveyor systems.
- Construction & Structural: Used in light structural applications, steel framing, brackets, and securing HVAC units and ductwork.
- Automotive & Transportation: Fastening parts in vehicle chassis, engine compartments, trailers, and truck bodies.
- Metal Fabrication: Essential in welding jigs, fixtures, and the assembly of custom metal structures and enclosures.
- General Maintenance & Repair: A staple in MRO (Maintenance, Repair, and Operations) kits for factories, plants, and facilities.
Advantages
Choosing our hex bolts provides tangible benefits that impact project efficiency, safety, and longevity.
- Superior Strength-to-Weight Ratio: Engineered materials offer high clamping force without unnecessary bulk, ideal for weight-sensitive applications.
- Enhanced Safety: Consistent metallurgy and manufacturing processes ensure predictable failure points and reliable performance under stress.
- Wide Compatibility: Standard dimensions ensure easy pairing with common nuts, washers, and tools, simplifying inventory and assembly processes.
- Corrosion Management: A range of protective finishes allows selection based on exposure to moisture, chemicals, or outdoor elements, extending service life.
- Cost-Effective Reliability: Reduces the total cost of ownership by minimizing downtime, replacement frequency, and the risk of joint failure.
Why Choose Us
As a trusted supplier in the industrial fasteners sector, we distinguish ourselves through an unwavering commitment to quality and customer service.
- Certified Quality Assurance: Every batch undergoes stringent testing for hardness, tensile strength, and dimensional accuracy, with certificates of compliance available.
- Extensive Inventory: We stock large quantities of the 1/4 x 3/4 hex bolt in various grades and finishes, ready for immediate shipment to keep your projects on schedule.
- Technical Expertise: Our team provides expert guidance on fastener selection, helping you choose the right specification for your specific load, environmental, and compliance requirements.
- Global Logistics Network: We facilitate seamless international trade with reliable packaging, efficient export documentation, and partnerships with major freight carriers.
- Competitive B2B Pricing: We offer scalable, volume-based pricing that provides excellent value for bulk procurement without compromising on material integrity.
FAQ
What is the difference between a hex bolt and a hex cap screw?
While the terms are often used interchangeably, a hex cap screw typically conforms to a more precise dimensional standard (like ASME B18.2.1) and is designed to be used in tapped holes or with a nut. A hex bolt may have a slightly less precise shank. Our 1/4 x 3/4 hex bolt is manufactured to cap screw standards for superior fit and performance.
Which grade should I choose for my application?
For general-purpose applications, Grade 5 offers an excellent balance of strength and ductility. For high-stress, critical connections (e.g., automotive, heavy machinery), choose Grade 8 or metric class 10.9. For corrosive environments, opt for stainless steel (304 or 316). Our sales team can assist with specific recommendations.
Does the 3/4" length include the head?
No. For a 1 4 x 3 4 hex bolt, the 3/4" measurement refers to the length of the shank from the underside of the head to the end of the bolt. The total overall length is slightly longer, including the head height.
Can you provide custom packaging or labeling?
Yes. We offer custom packaging solutions including poly bags, boxes, or bulk drums with your company's labels, barcodes, or other identification to streamline your receiving and inventory processes.
What are your minimum order quantities (MOQ)?
We cater to both large and small B2B clients. MOQs are flexible and typically based on weight (e.g., per carton). Contact us directly to discuss your volume requirements, and we will propose a suitable and economical solution.
