What is Hex Head Bolts

Hex head bolts are fasteners with a six-sided head (hexagonal head) and a threaded shaft designed to be used with a nut or threaded into a tapped hole. They are commonly used for various fastening applications due to their robustness and ease of installation.

 

Sizes

Hex head bolts are available in numerous sizes, typically measured by their diameter and thread pitch. Common sizes include:

– 3/8″, 1/2″, 5/8″, 3/4″, 7/8″, 1″, etc.: Denoting the diameter in inches.
– M6, M8, M10, M12, M16, M20, etc.: Denoting the diameter in millimeters.

These sizes correspond to various lengths and thread pitches suitable for different applications.

Specifications

Specifications for hex head bolts are often defined by industry standards such as:

1. ASTM A307: This specification covers carbon steel bolts and shapes used in construction and structural applications.

2. ASTM A325: A standard for structural bolts made from medium carbon steel with a higher strength than standard bolts, used in heavy-duty applications like construction.

3. ASTM A490: Similar to A325 but offering a higher strength and weathering characteristics for structural steel connections.

4. ISO 4014: An international standard specifying dimensions, tolerances, and mechanical properties for hexagon head bolts with partial thread.

Advantages

1. Ease of Use: Hex head bolts are easy to install using a wrench or socket, providing a secure grip for tightening or loosening.

2. High Strength: They offer high tensile strength, making them suitable for heavy-duty applications that require robust fastening.

3. Versatility: Available in various materials and sizes, hex head bolts can be used across different industries and applications, including construction, automotive, machinery, and more.

4. Secure Fastening: The six-sided head design allows for a secure grip, minimizing the risk of slippage during installation or removal.

Hex Head Bolt Availability

Hex head bolts are available in various materials, including:

– Carbon Steel: Commonly used in general-purpose applications where high strength is not required.

– Alloy Steel: Offers higher strength and durability, suitable for heavy-duty applications.

– Stainless Steel: Known for corrosion resistance, ideal for outdoor, marine, and chemical environments.

– Brass: Used in applications requiring aesthetics and corrosion resistance.

Sino Special Metal’s Supply:

Sino Special Metal specializes in supplying a comprehensive range of hex head bolts across different sizes, materials, and specifications. Our inventory includes carbon steel, alloy steel, stainless steel, brass, and other specialty materials.

Our Offerings:
We provide hex head bolts that comply with industry standards like ASTM and ISO, ensuring quality, reliability, and suitability for various applications.

Custom Solutions:
Understanding diverse industry needs, we offer customized solutions for hex head bolts, including specific sizes, materials, coatings, and finishes.

Quality Assurance:
Our hex head bolts undergo rigorous quality checks to meet or exceed industry standards, ensuring optimal performance and durability.

Prompt Delivery:
With efficient supply chain management, we ensure prompt delivery, meeting project timelines and requirements.

Hex head bolts offer ease of use, high strength, and versatility. Sino Special Metal’s commitment to quality, customization, and timely delivery ensures a wide range of hex head bolts in different materials, meeting industry standards and providing tailored solutions for various applications.

Hex head cap screws vs hex head bolts

Hex head cap screws and hex head bolts are both common types of fasteners with similar hexagonal-shaped heads, but they differ in specific features and intended applications:

Hex Head Cap Screw:

Hex Head Cap Screw Characteristics:

1. Head Design: The head of a hex head cap screw typically has a flat bearing surface and chamfered edges, allowing it to be driven into a tapped hole or used with a nut.

2. Thread Length: Cap screws generally have a fully threaded shaft, meaning the threading extends along the entire length of the screw.

3. Usage: These screws are commonly used in applications where a precise clamp load or a flush finish is required, typically without using a nut. They are often employed in machine assembly, automotive, and construction.

Hex Head Bolt:

Hex Head Bolt Characteristics:

1. Head Design: Similar to cap screws, hex head bolts have a hexagonal head but often feature a washer face under the head, providing a larger bearing surface and distributing the load over a wider area when used with a nut.

2. Thread Length: Hex head bolts usually have a partial thread, with the threaded portion covering a specific length while the remaining portion is unthreaded (referred to as the shank).

3. Usage: These bolts are primarily utilized in applications where a nut is required to secure objects together. They are commonly used in structural connections, machinery, and construction.

Key Differences:

1. Fully Threaded vs. Partial Thread: The most apparent difference lies in the threading. Cap screws are typically fully threaded, while bolts often have a partially threaded shank.

2. Application: Cap screws are used where a precise fit or flush finish is necessary without using a nut. Bolts are used with nuts to fasten materials together, offering a larger bearing surface.

3. Length: Cap screws’ threading extends the entire length, whereas bolts may have unthreaded shanks designed to penetrate into materials without threading entirely.

4. Purpose: Cap screws are often used in machinery, automotive, or equipment assembly. Bolts are utilized in structural connections or where a larger load-bearing surface is required.

Summary:

– Hex Head Cap Screw: Fully threaded, used without a nut, for precise fit and flush finish.

– Hex Head Bolt: Partially threaded, used with a nut, for structural connections and when a larger bearing surface is needed.

While both share similar appearances, understanding their threading, usage, and application requirements helps in selecting the appropriate fastener for specific tasks based on load-bearing needs, surface finish, and structural considerations.