Value Collection R52001031 1/4-20 Unc Machine Screw

Product Description

The VALUE COLLECTION R52001031 is a 1/4-20 UNC Phillips drive pan head machine screw designed for general fastening applications across mechanical, electrical, and structural assemblies. The screw measures 1/2 inch in length under the head and is manufactured from Grade J82 steel with a zinc-plated finish for corrosion resistance in standard indoor environments. An integrated external tooth lock washer style provides added resistance to loosening under vibration. This fastener is a reliable choice for trade professionals who need a code-compliant, industry-standard threaded fastener in quantity.

This machine screw is suited for use in residential and light commercial applications including electrical panel assembly, HVAC component mounting, plumbing fixture brackets, and general equipment fabrication. The 1/4-20 UNC thread form is one of the most common unified coarse thread standards, making this screw compatible with a wide range of pre-tapped holes, nuts, and threaded inserts across trade disciplines. It is commonly installed by electricians, HVAC technicians, and plumbers during equipment installation and service work.

Key Features

• 1/4-20 UNC thread form — one of the most widely used coarse thread standards in trade applications
• 1/2 inch length under head for shallow-clearance fastening situations
• Phillips drive pan head for quick installation with standard bit drivers
• Grade J82 steel construction for reliable tensile strength in general-duty use
• Zinc-plated finish provides basic corrosion protection in dry or low-humidity environments
• External tooth lock washer style resists loosening under vibration

Compatibility

Designed as a general-purpose 1/4-20 UNC threaded fastener compatible with standard pre-tapped holes, hex nuts, and threaded inserts requiring a 1/4-20 coarse thread pattern.

Installation Notes

Installation requires a standard Phillips bit driver or screwdriver sized for a 1/4-20 pan head fastener. Ensure the mating thread or nut is also rated for 1/4-20 UNC before installation. De-energize any electrical equipment before fastening components in live panels or enclosures. Do not overtighten into plastic or soft substrates, as the steel thread can strip the mating material.