Value Collection R40694440 Hex Socket Cap Screw 1/4-28 Unf

Product Description

The VALUE COLLECTION R40694440 is a hex socket cap screw designed for precision fastening applications requiring fine-thread engagement and corrosion resistance. Threaded to the 1/4-28 UNF standard, the screw features a 3/8 inch length under head and accepts a 3/16 inch hex drive. The base material is 18-8 stainless steel, offering solid resistance to oxidation and general corrosion without requiring additional coating. This fastener is suited for mechanical assemblies, equipment fabrication, and maintenance applications where a compact, high-strength cap screw with a flush-driving profile is required.

The R40694440 is appropriate for use in light industrial, commercial, and maintenance environments. Its fine 1/4-28 UNF thread pitch provides greater thread engagement per inch compared to coarse-thread equivalents, making it well suited for thin-material applications, vibration-prone assemblies, and situations requiring precise torque control. Machinists, maintenance technicians, and fabricators commonly spec this type of fastener in metal-to-metal connections where a recessed socket drive is preferred over an external hex head.

Key Features

• 1/4-28 UNF fine-thread specification for increased thread engagement and vibration resistance
• 3/8 inch length under head for shallow-clearance fastening applications
• 3/16 inch hex socket drive for use with standard Allen or hex keys
• 18-8 stainless steel construction provides corrosion resistance without additional surface treatment
• Socket cap head profile allows installation in recessed or confined spaces

Compatibility

Designed as an OEM-style replacement or direct-use fastener for assemblies calling out a 1/4-28 UNF hex socket cap screw with a 3/8 inch length under head in 18-8 stainless steel.

Installation Notes

Installation is performed by machinists, fabricators, or maintenance technicians using a 3/16 inch hex key or Allen driver. Ensure the mating tapped hole is clean and free of debris before driving. De-energize or lock out any equipment before replacing fasteners in live assemblies. Avoid over-torquing stainless steel fasteners, as galling can occur without proper lubrication.