Oatey Company 335621 Heavy Hex Nut 3/8 Inches 10 Pack

Product Description

The OATEY COMPANY 335621 is a heavy hex nut sized at 3/8 inches, sold in a 10-pack for trade and industrial fastening applications. Heavy hex nuts feature a wider, thicker profile than standard hex nuts, providing greater bearing surface and improved resistance to loosening under vibration or load. This makes them well suited for structural connections, equipment mounting, and mechanical assemblies where standard fastener tolerances are not sufficient. Licensed plumbers, pipefitters, HVAC technicians, and general contractors typically keep heavy hex nuts on hand for a range of field and shop applications.

The 335621 10-pack is appropriate for residential and commercial job sites where 3/8 inch threaded fasteners are in use. Common applications include securing pipe hangers, equipment bases, access panels, and structural brackets. The bulk pack format reduces the need for repeated supply runs and keeps inventory stocked for ongoing service calls or new installations.

Key Features

• Heavy hex profile provides increased bearing surface compared to standard hex nuts
• 3/8 inch thread size fits standard 3/8 inch threaded rod, bolts, and studs
• 10-pack format supports stocking for multi-job or high-volume use
• Wider flats and greater thickness improve resistance to loosening under load or vibration

Compatibility

Designed for use with standard 3/8 inch threaded fasteners including bolts, studs, and threaded rod in plumbing, HVAC, and general mechanical installations.

Installation Notes

Heavy hex nuts are installed by plumbers, pipefitters, HVAC mechanics, and general contractors using standard wrenches or sockets. Always de-energize or isolate any system before securing equipment with fasteners. Torque to the fastener manufacturer's specifications for the application. Follow applicable local codes and standards when used in structural or pipe-support connections.

Technical Specifications

• Thread Size: 3/8 inches
• Package Quantity: 10 pieces
• Weight: 1.39 pounds

Standard Information

• Brand: OATEY COMPANY
• Manufacturer Part Number: 335621