TheBetterBuy logo
Sirius 12.9 Grade Socket Head Cap Screws UNC 3/8 UNC 1" 1/4" Pack of 200 - Image 1
1 / 2

Sirius 12.9 Grade Socket Head Cap Screws UNC 3/8 UNC 1" 1/4" Pack of 200

Sirius

Compare today's prices on the "Sirius 12.9 Grade Socket Head Cap Screws UNC 3/8 UNC 1" 1/4" Pack of 200".

Available From

(2 stores)
Last Updated: 19/09/2026
My Tool Shed logo

My Tool Shed

In Stock
View Deal
£0.49
Best Price
⚖️Price Matched
*Delivery Calculated at Checkout | View More
Tooled Up logo

Tooled Up

In Stock
View Deal
£0.49
Best Price
⚖️Price Matched
*Delivery Calculated at Checkout | View More
amazon-logo

Amazon

ebay-logo

Ebay

*This site uses affiliate links. If you make a purchase through one of them, we may earn a small commission — at no additional cost to you.

Product Description

Compare today's prices on the "Sirius 12.9 Grade Socket Head Cap Screws UNC 3/8 UNC 1" 1/4" Pack of 200".

Sirius 12.9 Grade Socket Head Cap Screws UNC 3/8 UNC 1" 1/4" Pack of 200

This pack of 200 Sirius socket head cap screws delivers exceptional strength and reliability for high-stress fastening applications. Manufactured from premium 12.9 grade alloy steel, these screws offer superior tensile strength and hardness compared to standard grades, making them ideal for demanding engineering, automotive, and industrial assemblies where safety and durability are paramount. The UNC thread profile ensures compatibility with standard imperial nuts and tapped holes, while the socket head design allows for secure, high-torque tightening using a hex key. Whether you are securing machinery components, mounting brackets, or performing general maintenance, these screws provide a dependable hold that resists shearing and deformation under heavy loads.

- Made from 12.9 grade alloy steel for maximum tensile strength (up to 1220 MPa)

- UNC 3/8 thread size, 1 inch length - ideal for medium-duty fastening tasks

- Supplied in a convenient pack of 200 for multiple projects or repeated use

- Bright finish with surface hardening for resistance to wear and corrosion

- Precision-formed socket head allows for a secure hex key grip without cam-out

- Meets strict international quality standards for consistent dimensions and performance

Trust the Sirius name for robust, high-quality fasteners that keep your work secure and professional.

GTIN: 5014196338859