Value Collection R40664143 Hex Socket Cap Screw 4-40 Unc

Product Description

The VALUE COLLECTION R40664143 is a hex socket cap screw designed for precision fastening in mechanical assemblies, equipment fabrication, and maintenance applications. Threaded to 4-40 UNC with a 1 inch length under head, this fastener accepts a 3/32 inch hex drive key for installation and removal. The screw is manufactured from 18-8 stainless steel, providing corrosion resistance in wet or chemically exposed environments. Its small-diameter thread profile suits tight clearance applications where space is limited. Machinists, maintenance technicians, and assembly workers commonly install this style of fastener when building or repairing precision equipment, instrumentation panels, and light mechanical components.

This socket cap screw is suited for light-duty threaded fastening in both residential and commercial equipment maintenance scenarios. Typical applications include securing small covers, brackets, access panels, and mechanical components in environments where corrosion resistance is a requirement. The 4-40 UNC thread size is a fine-pitch designation common in instrumentation, electronics enclosures, HVAC controls, and similar assemblies requiring a compact, high-strength fastener profile.

Key Features

• 4-40 UNC thread size for precision-fit fastening in small-clearance assemblies
• 1 inch length under head provides adequate grip depth for most light-duty mounting applications
• 3/32 inch hex socket drive compatible with standard hex keys and bit drivers
• 18-8 stainless steel construction resists corrosion in wet and mildly corrosive environments
• Low individual screw weight of approximately 0.003 pounds suits weight-sensitive assemblies

Compatibility

Designed as a standard 4-40 UNC hex socket cap screw suitable for use in any threaded application calling for this thread size, drive type, and material grade.

Installation Notes

Installation is performed with a 3/32 inch hex key or T-handle driver. Power down or de-energize any equipment before accessing fastener locations inside electrical or control enclosures. Do not over-torque small-diameter stainless steel fasteners, as the material is susceptible to galling under excessive torque. Follow applicable equipment manufacturer instructions and relevant mechanical or electrical codes when installing fasteners in rated assemblies.