The 3/8-16 x 1 1/4 socket head cap screw is an essential piece of hardware used in a variety of applications. This small but powerful screw features a hexagonal-shaped head and a threaded shank for secure fastening. With its impressive strength and durability, it is no wonder that this particular fastener has become so popular. But what makes this screw so special? In this introduction, we will explore the complexities and variability of the 3/8-16 x 1 1/4 socket head cap screw, delving into its perplexity and burstiness to understand how it can be effectively used in all sorts of projects.
Why 3/8-16 x 1 1/4 socket head cap screw Is Necessary?
A 3/8-16 x 1 1/4 socket head cap screw is necessary because it is a strong, reliable fastener that can be used in a variety of applications. It is a high-strength, heat-treated steel screw with a hexagonal drive for use in applications with limited space or access. The socket head design allows for easy installation using a socket wrench, and the cap provides an aesthetic finish. The length of the screw (1 1/4 inch) provides extra strength to help keep pieces tightly connected and secure, making it an ideal choice for metal working, furniture assembly, and other projects requiring strong fasteners.
Comperision Chart for 3/8-16 x 1 1/4 socket head cap screw
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1
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PRODUCT NAME
3/8-16 x 1-1/4″ Socket Head Cap Screws Bolts, Stainless Steel 18-8 (304), Bright Finish, Fully Threaded, Allen Socket Drive, 10 PCS
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SERIAL
2
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PRODUCT NAME
3/8-16 x 1″ Button Head Socket Cap Screws, Grade 10.9 Alloy Steel Black Oxide, Allen Hex Drive, UNC Coarse Thread Fully Threaded, 10 PCS
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SERIAL
3
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PRODUCT NAME
3/8-16 x 1″ Button Head Socket Cap Bolts Screws, 304 Stainless Steel 18-8, Full Thread, Coarse Thread UNC, Allen Hex Drive, 5 PCS
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SERIAL
4
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PRODUCT NAME
Socket Flat Countersunk Head Cap Screw, 3/8-16 x 1 1/4″, Alloy Steel, Black Oxide, Hex Socket (Quantity: 500) Coarse Thread, 3/8 inch Allen Bolt, Length: 1 1/4 inch, Full Thread
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SERIAL
5
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PRODUCT NAME
Socket Flat Countersunk Head Cap Screw, 3/8-16 x 1 1/4″, Alloy Steel, Black Oxide, Hex Socket (Quantity: 100) Coarse Thread, 3/8 inch Allen Bolt, Length: 1 1/4 inch, Full Thread*
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3-8-16 x 1-1-4 Socket Head Cap Screws Bolts Stainless Steel 18-8 (304), Bright Finish, Fully Threaded, Allen Socket Drive, 10 PCS

Socket Head Cap Screws are an essential tool for many construction and manufacturing projects. They are small screws that have a hexagonal head and are used to secure two pieces of material together. These 3/8-16 x 1-1/4″ Socket Head Cap Screws Bolts from Stainless Steel 18-8 (304) are the perfect choice for your fastening needs. With a bright finish and full threading, these bolts provide superior holding power and corrosion resistance. Plus, they come with an Allen Socket Drive so you can easily install them without needing to run to the hardware store for a special tool.
Why We Like This
High Level Of Chemical And Corrosion Resistance: The socket head cap screws are made from 100% stainless steel 18-8 (304), ensuring that they can withstand even the most extreme conditions.
Durable: With a thread diameter of 3/8 Inch, thread length of 1-1/4 Inch, and thread count of 16 threads per inch, these bolts are built to last.
Easy To Install: The Allen Socket Drive allows you to easily install these bolts without needing to buy any special tools.
Variety Of Uses: These bolts can be used in wood or wet environments, making them versatile enough for all types of projects.
Affordable: You get 10 PCS in one package at an affordable price!
Common Questions & Answers
Q1: What material is the socket head cap screw made from?
A1: The socket head cap screw is made from 100% stainless steel 18-8 (304), offering high levels of chemical and corrosion resistance.
Q2: What size are these bolts?
A2: These bolts have a thread diameter of 3/8 Inch, thread length of 1-1/4 Inch, and thread count of 16 threads per inch.
Q3: How easy is it to install these bolts?
A3: Installing these bolts is easy thanks to the included Allen socket drive!
Additional Product Information
3-8-16 x 1 Button Head Socket Cap Screws Grade 10.9 Alloy Steel Black Oxide, Allen Hex Drive, UNC Coarse Thread Fully Threaded, 10 PCS

The 3/8-16 x 1″ Button Head Socket Cap Screws from Grade 10.9 Alloy Steel Black Oxide are the perfect choice for home and industrial projects. These screws are made with 100% Grade 10.9 Alloy Steel which offers a high level of chemical and corrosion resistance, making them suitable for wet environments. With a low profile design, these screws offer a much larger contact surface than most other screw heads. This makes them ideal for woodworking projects where aesthetics are important. The thread diameter is 3/8″, with a head diameter of 0.656″ and head height of 0.199″. The screw length is 1″, with 16 threads per inch. It also includes an Allen Hex Drive of 7/32″. The package includes 10 PCS Button Head Socket Screws 3/8-16 x 1 Inch, making them perfect for any project that requires multiple screws.
Why We Like This
Made of 100% Grade 10.9 Alloy Steel which offers a high level of chemical and corrosion resistance
Low profile design provides large contact surface area making it ideal for woodworking projects
Thread diameter is 3/8″, head diameter is 0.656″, head height is 0.199″ and screw length is 1″
Includes an Allen Hex Drive of 7/32″
Package includes 10 PCS Button Head Socket Screws 3/8-16 x 1 Inch
Common Questions & Answers
Q: Is this product suitable for wet environments?
A: Yes, these screws are made with 100% Grade 10.9 Alloy Steel which offers a high level of chemical and corrosion resistance, making them suitable for wet environments.
Q: What size are the screws?
A: The thread diameter is 3/8″, with a head diameter of 0.656″ and head height of 0.199″. The screw length is 1″, with 16 threads per inch and an Allen Hex Drive of 7/32″.
Q: How many screws come in the package?
A: The package includes 10 PCS Button Head Socket Screws 3/8-16 x 1 Inch, making them perfect for any project that requires multiple screws
Additional Product Information
Size | 3/8-16 x 1″ (10 PCS) |
3-8-16 x 1 Button Head Socket Cap Bolts Screws 304 Stainless Steel 18-8, Full Thread, Coarse Thread UNC, Allen Hex Drive, 5 PCS

These 3/8-16 x 1″ Button Head Socket Cap Bolts Screws are a great choice for a variety of projects that require strong, corrosion resistant fasteners. They are made of high quality stainless steel 304 (18-8) which provides excellent strength and durability in even the most demanding environments. The Allen Hex Drive Size is 7/32 inch and the thread size is 3/8-16 with 16 TPI Coarse Thread (UNC). The exterior finish is bright and the color is silver tone. You get 5 bolts in each pack.
Why We Like This
High Quality Material: Made of Stainless Steel 304 (18-8) for excellent strength and corrosion resistance.
Easy to Install: The Allen Hex Drive Size is 7/32 inch and the thread size is 3/8-16 with 16 TPI Coarse Thread (UNC).
Durable: The exterior finish is bright and the color is silver tone, making them highly durable.
Quantity: You get 5 bolts in each pack so you can complete large projects quickly.
Versatile: These bolts are suitable for a variety of projects that require strong, corrosion resistant fasteners.
Common Questions & Answers
Q: What’s the length of the bolt?
A: The length of the bolt is 1 inch or 25mm from under the head.
Q: What’s diameter of the Head?
A: The diameter of the Head is 0.656 inch.
Q: What’s Height of the Head?
A: The height of the Head is 0.199 inch
Additional Product Information
Size | 3/8-16 x 1″ |
Socket Flat Countersunk Head Cap Screw 3-8-16 x 1 1-4, Alloy Steel, Black Oxide, Hex Socket (Quantity: 500) Coarse Thread, 3-8 inch Allen Bolt, Length: 1 1-4 inch, Full Thread

These Socket Flat Countersunk Head Cap Screws provide reliable fastening for a variety of applications. Made with high-quality alloy steel and finished with a black oxide coating, these 3/8-16 x 1 1/4″ screws are perfect for creating a secure connection. Hex Socket Allen keys are recommended to tighten them, and they have a coarse thread and full thread, allowing for easy installation. With 500 screws in the pack, you wont be running out anytime soon.
Why We Like This
Durable alloy steel construction provides reliable fastening
Full thread and coarse thread ensure easy installation
Black oxide coating gives added protection against rusting
Recommended to use with Hex Socket Allen keys
Comes in a pack of 500 screws
Common Questions & Answers:
Q: What size Allen key is needed?
A: A 7/32 inch Hex Socket Allen Key is recommended to use with these screws.
Q: Does the black oxide coating protect against rust?
A: The black oxide coating does not provide complete protection against rusting, so it’s best to use stainless steel material in environments with moisture.
Q: How many screws come in the pack?
A: There are 500 screws included in each pack.
Additional Product Information
Length | 1.25 |
Weight | 19.91 |
Size | 3/8-16 x 1 1/4 inch |
Socket Flat Countersunk Head Cap Screw 3-8-16 x 1 1-4, Alloy Steel, Black Oxide, Hex Socket (Quantity: 100) Coarse Thread, 3-8 inch Allen Bolt, Length: 1 1-4 inch, Full Thread*

Socket Flat Countersunk Head Cap Screws are perfect for any job that needs a secure, reliable fastener. They feature a hex socket drive and are made from alloy steel with a black oxide finish. These screws have a coarse thread and come in various sizes, making them great for a variety of applications. The 3/8-16 x 1 1/4″ socket flat countersunk head cap screw is the perfect choice for those looking for an easy to install and reliable fastening solution.
Why We Like This
Easy to Install: Hex socket drive ensures quick and easy installation.
Durable: Made from alloy steel with a black oxide finish for superior strength and durability.
Versatile: Coarse thread allows for use in various applications with different sizes available.
Secure: Socket flat countersunk head cap screws provide secure fastening solutions.
Reliable: Quality construction ensures reliable performance even in the toughest conditions.
Common Questions & Answers
Q: What size hex socket wrench is required?
A: A 7/32 inch hex socket wrench is recommended for this product.
Q: Is this product rust resistant?
A: Black oxide is not a protective finish and will rust if exposed to moisture. Stainless Steel material is recommended for environments with moisture.
Q: What thread type is this product?
A: This product has coarse threads.
Additional Product Information
Length | 1.25 |
Weight | 3.99 |
Size | 3/8-16 x 1 1/4 inch |
Benefits of 3/8-16 x 1 1/4 socket head cap screw
1. Easy to install: The socket head cap screw allows for a fast and efficient installation process as they can be quickly tightened using a wrench or socket.
2. Durability: The 3/8-16 x 1 1/4 socket head cap screw is made with high-strength steel, making it highly resistant to wear and tear, giving it a longer lifespan than many other types of screws.
3. Versatility: The 3/8-16 x 1 1/4 socket head cap screw is compatible with various materials including wood, plastic, and metal, making it an ideal choice for a wide range of projects.
4. Cost-effective: The 3/8-16 x 1 1/4 socket head cap screw is one of the most economical types of screws available on the market, offering great value for money.
Buying Guide for 3/8-16 x 1 1/4 socket head cap screw
Description
A 3/8-16 x 1 1/4 socket head cap screw is a type of fastener consisting of an externally threaded bolt with a hexagonal shaped head. It is commonly used in applications requiring a secure and strong connection due to its ability to generate high levels of clamping force. This type of screw is specifically designed for use with a socket wrench or Allen key, making it easy to install and remove.
Materials
3/8-16 x 1 1/4 socket head cap screws are typically made from stainless steel, which provides superior strength and corrosion resistance. Additionally, they can also be made from brass, aluminum or titanium for more lightweight applications where strength is not as important.
Size
The size of the 3/8-16 x 1 1/4 socket head cap screw refers to the diameter (3/8 inch) and thread pitch (16 threads per inch) of the screw. The length (1 1/4 inch) indicates how far the screw extends beyond the head when installed.
Head Design
The hexagonal shaped head on a 3/8-16 x 1 1/4 socket head cap screw makes it easy to tighten or loosen with an Allen key or socket wrench. The shape also helps distribute torque evenly across the entire surface area, providing greater clamping force than other types of fasteners such as flathead screws or Phillips head screws.
Performance
The 3/8-16 x 1 1/4 socket head cap screw is designed to provide high levels of clamping force when tightened correctly, making it ideal for applications that require secure fastening solutions. Additionally, these screws are resistant to vibration, making them well suited for use in machinery and other environments where motion is present.
The 3/8-16 x 1 1/4 socket head cap screw is an excellent choice for projects that require a secure and reliable fastener. Its unique socket head cap design makes it easy to install and provides a strong hold on whatever material it is being used on. It is corrosion resistant, making it suitable for both indoor and outdoor applications. Its versatility and durability make it an ideal choice for any project.