Value Collection R63008849 Flat Socket Cap Screw 4-40

Product Description

The VALUE COLLECTION R63008849 is a flat socket cap screw designed for applications requiring a flush or countersunk fastener profile. Featuring an 82-degree flat head and a 1/16-inch hex socket drive, this screw accepts a standard hex key for installation. Built from 18-8 stainless steel, it provides solid corrosion resistance in general-purpose and light industrial environments. The 4-40 UNC thread and 1/2-inch overall length make it well suited for close-tolerance assemblies where head clearance is critical. Machinists, fabricators, and maintenance technicians working with light-gauge components will find this screw a practical choice for countersunk fastening tasks.

This flat socket cap screw is used in precision mechanical assemblies, panel fabrication, instrument enclosures, and light machine components where a low-profile flush head is required. The 4-40 UNC thread size is common in small-diameter applications such as electronics enclosures, jigs, fixtures, and light structural brackets. The 18-8 stainless steel construction suits indoor and mildly corrosive environments without sacrificing machinability or installation ease.

Key Features

• 82-degree flat head seats flush in standard countersunk holes for a clean, low-profile finish
• 1/16-inch hex socket drive accepts a standard hex key for positive torque transfer in tight spaces
• 18-8 stainless steel construction provides good corrosion resistance and moderate strength
• 4-40 UNC thread standard ensures compatibility with widely available tapped holes and nuts
• 1/2-inch overall length measured from top of head to tip of thread
• Lightweight at approximately 0.003 pounds per piece, suited for weight-sensitive assemblies

Compatibility

Designed as a standard 4-40 UNC flat socket cap screw for use in countersunk hole patterns requiring an 82-degree head angle; compatible with any application calling for a 4-40 UNC thread, 1/2-inch overall length, and 82-degree flat hex socket fastener.

Installation Notes

Installation requires a 1/16-inch hex key or Allen driver; ensure the mating hole is properly countersunk to 82 degrees for full head seating. Avoid overtightening in tapped plastic or soft metal components, as 18-8 stainless steel can gall when threaded into stainless tapped holes without lubrication. Power down or de-energize any equipment before accessing fastened assemblies. Follow applicable mechanical and electrical codes for the installation environment.