Value Collection R4-40X1/4 Machine Screw 4-40 Ss Pack of 25

Product Description

The VALUE COLLECTION R4-40X1/4 is a 4-40 UNC pan head Phillips drive machine screw with an integrated silicone O-ring, designed for self-sealing fastener applications. The screw is manufactured from 18-8 stainless steel with a bright uncoated finish, providing corrosion resistance in wet, humid, or chemically exposed environments. At 1/4 inch length under head, this screw is sized for light-duty panel, enclosure, and equipment assembly work. The silicone O-ring creates a seal around the fastener, preventing fluid ingress or pressure leakage at the fastener hole. Machinists, maintenance technicians, and equipment assemblers working on HVAC panels, electrical enclosures, and plumbing equipment will find this fastener a direct fit for self-sealing threaded installations requiring corrosion resistance.

This machine screw is suited for use in residential and commercial equipment assembly, enclosure fabrication, and maintenance applications where a standard threaded fastener alone would not provide adequate sealing at the fastener point. The No. 1 Phillips drive is compatible with standard Phillips screwdrivers and power drivers commonly used in panel and equipment work. The 4-40 UNC thread standard ensures compatibility with standard 4-40 tapped holes and nuts. Each package contains 25 screws, making this suitable for both single repairs and small-batch assembly tasks.

Key Features

• 4-40 UNC thread for use in standard 4-40 tapped holes
• Integrated silicone O-ring provides self-sealing performance at the fastener point
• 18-8 stainless steel construction resists corrosion in wet and humid environments
• Bright uncoated finish maintains dimensional accuracy for precise thread engagement
• No. 1 Phillips pan head drive compatible with standard hand and power tools
• Sold in packs of 25 for assembly and maintenance efficiency

Compatibility

Designed as a self-sealing machine screw replacement or assembly component for equipment and enclosures with standard 4-40 UNC tapped holes requiring a pan head Phillips drive fastener with sealing capability.

Installation Notes

Installation is appropriate for qualified technicians and assemblers working on electrical enclosures, HVAC control panels, or plumbing equipment. Power down or de-energize any equipment before accessing internal fasteners. Use a properly sized No. 1 Phillips driver to avoid cam-out and O-ring displacement. Do not overtorque, as overtightening can damage the silicone O-ring and compromise the seal.