Jergens 31901 Standard Flat Washer 3/16 in Steel Plain

Product Description

The JERGENS 31901 is a standard flat washer designed for use with 3/16 inch screws in general fastening applications across mechanical, structural, and light industrial assemblies. Manufactured from 1010 steel with a plain finish, this washer distributes load across the bearing surface to reduce fastener pull-through and protect the mating material. The inside diameter measures 13/64 inches, the outside diameter measures 1/2 inch, and the thickness is 3/32 inches. It follows inch-system dimensional standards and suits a wide range of bolted and screwed connections where a standard-duty washer is specified.

This washer is used in residential, commercial, and light industrial fastening applications wherever a 3/16 inch screw or bolt requires load distribution or surface protection. Typical installation scenarios include equipment assembly, panel mounting, fixture attachment, and general mechanical construction. The plain finish is suitable for interior applications or where post-installation coating will be applied. Electricians, plumbers, HVAC technicians, and general contractors commonly stock this size for routine service and assembly work.

Key Features

• Fits 3/16 inch screw size with a 13/64 inch inside diameter for proper clearance
• 1/2 inch outside diameter provides adequate load-bearing surface for standard fastening
• 3/32 inch thickness meets standard flat washer dimensional requirements
• 1010 steel construction offers solid strength for general-duty applications
• Plain finish works in interior environments or as a base for field-applied coatings
• Inch-system dimensions for straightforward integration with standard hardware

Compatibility

Designed as an OEM-style standard flat washer for use with 3/16 inch fasteners in general mechanical and structural assemblies following inch-system standards.

Installation Notes

Install by placing the washer on the fastener shank before seating against the mating surface. Ensure the inside diameter clears the screw threads without binding. Plain-finish steel washers are not recommended for outdoor or high-humidity environments without additional corrosion protection. No special tooling is required for installation.