3/8"-16 Serrated Flange Nuts – Coarse Thread – Pack of 1,000

These 3/8"-16 serrated flange nuts are designed for garage door installation, commercial door hardware, structural hardware, and general fastening applications where a secure connection and resistance to loosening are important.

The integrated flange provides a wider bearing surface than a standard hex nut, while the serrated underside helps grip the mating surface when tightened. This design can eliminate the need for a separate lock washer in many appropriate applications.

This listing contains a bulk pack of 1,000 nuts, making it ideal for garage door installers, commercial door companies, contractors, maintenance departments, and shops that regularly use 3/8"-16 hardware.

Specifications

Key Features

• Bulk pack of 1,000

• Standard 3/8"-16 coarse thread

• Integrated flange distributes clamping force across a wider surface

• Serrated underside helps resist loosening

• External hex design for standard wrench or socket installation

• Useful for garage door installation and repair

• Convenient bulk quantity for professional installers and service companies

Common Garage Door Applications

3/8"-16 hardware is commonly used in a variety of commercial and residential garage door installations, including compatible:

• Track and structural hardware

• Angle assemblies

• Brackets and supports

• Operator mounting hardware

• Commercial sectional door components

• General repair and fabrication work

Always verify that the thread size and fastener specifications match the bolt and hardware being used.

How Serrated Flange Nuts Work

A serrated flange nut combines a hex nut with an enlarged built-in flange.

The flange spreads clamping force over a larger area, while the teeth on the underside bite into the mating surface as the nut is tightened. This helps increase resistance to vibration-related loosening compared with a standard plain hex nut.

Compatibility & Selection

These nuts are designed for bolts and threaded hardware using 3/8"-16 UNC threads.

Before ordering, verify:

• Bolt diameter is 3/8"

• Thread pitch is 16 threads per inch

• Serrated flange-style hardware is appropriate for the application

• The mating surface can accept a serrated locking surface

Do not combine 3/8"-16 nuts with 3/8"-24 fine-thread bolts. The thread pitches are different and are not interchangeable.

Quantity Note

This listing contains 1,000 individual 3/8"-16 serrated flange nuts.

Selecting a quantity of 1 on the product page means you are purchasing one package of 1,000 nuts, not one individual nut.

Installation Note

Tighten using the appropriate socket or wrench and follow the torque requirements of the specific hardware or equipment being assembled.

Because the serrations are designed to grip the mating surface, these nuts may mark painted or finished surfaces when tightened.

3/8"-16 Serrated Flange Nuts – 1,000 Piece Bulk Pack

Bulk pack of 1,000 3/8"-16 serrated flange nuts with coarse UNC threads and integrated locking flange for garage door hardware, commercial installations, maintenance, and general fastening applications.