Socket Head Cap Screw, 4in, Stainless Steel, Polyurethane, Brake Finish Pkg Qty 2

Overview

This heavy-duty socket head cap screw is engineered for high-stress industrial environments where structural integrity and vibration resistance are paramount. Featuring a robust 4-inch length, this fastener combines a stainless steel core with a specialized polyurethane coating to deliver exceptional durability. The unique brake finish provides enhanced friction properties, ensuring the connection remains secure even under dynamic loading conditions or high-torque applications. Designed strictly to imperial standards, this component eliminates the need for metric conversions in US-based manufacturing and assembly lines, offering a reliable solution for heavy machinery, automotive frameworks, and large-scale infrastructure projects.

Key Features

Stainless steel core provides superior tensile strength and corrosion resistance Polyurethane outer layer offers excellent vibration damping and noise reduction Brake finish surface treatment prevents loosening caused by mechanical shock 4-inch overall length accommodates thick

material

stacks and deep joint assemblies Socket head design allows for high torque application in confined spaces Imperial sizing ensures seamless integration with existing US standard tooling Packaged in pairs for convenient inventory management and replacement cycles

Specifications

System of Measurement: Imperial Core

Material

Grade: Stainless Steel Coating

Material

Polyurethane Overall Length: 4 inches Thread Specification: Converted from M12x25mm to approximate 1/2 inch diameter with 20 threads per inch (UNF) Surface Finish: Brake Finish for high-friction retention Drive Type: Internal Socket Head Package Quantity: 2 units per pack

Applications

Heavy equipment manufacturing and earth-moving machinery assembly Automotive chassis framing and suspension system connections Marine industry components requiring saltwater corrosion resistance Railroad car construction and maintenance operations Large-scale HVAC ductwork and industrial piping support structures Power generation turbine housing and generator frame fastening Mining equipment subjected to extreme vibration and abrasive environments This fastener represents a critical upgrade for maintenance teams dealing with recurring loosening issues in vibrating assemblies. The combination of metal strength and polymer flexibility creates a composite fastener that absorbs energy rather than transferring stress to the threaded hole, significantly extending the service life of both the screw and the host material. The brake finish acts as a mechanical lock, reducing reliance on chemical thread lockers which can degrade over time or contaminate sensitive systems. Ideal for facilities transitioning to fully imperial supply chains, this product simplifies procurement while enhancing operational safety and reliability.