A307 GR A White Zinc Roofing Bolt with Hex Nut Assembled

The A307 GR A White Zinc Roofing Bolt with Hex Nut Assembled is a type of fastener commonly used in construction, particularly for securing metal roofing and siding. 

Here's a breakdown of its key features:

1. A307 Grade A Specification

This bolt conforms to ASTM A307, which covers carbon steel bolts and studs for general applications.

Grade A indicates a low-to-medium strength bolt suitable for non-critical structural connections.

2. White Zinc Coating

The bolt is coated with white zinc (zinc plating), providing corrosion resistance.

White zinc offers a cleaner, brighter finish compared to yellow zinc and is often used for aesthetic purposes in visible applications.

3. Roofing Bolt Design

Typically has a large, flat head (like a pan head or truss head) to distribute load and prevent pull-through on thin metal sheets.

May feature a neoprene or EPDM washer (not always included unless specified) to ensure a watertight seal.

4. Hex Nut Included

Comes pre-assembled with a hex nut (also zinc-plated for corrosion resistance).

The nut allows for secure tightening against metal roofing or structural components.

5. Common Applications

Metal roofing & siding installations

HVAC ductwork

General sheet metal fastening

6. Sizing & Availability

Available in various lengths and diameters (e.g., 1/4”, 5/16”, 3/8”).

Length is measured from under the head to the threaded end.

Alternatives/Related Fasteners

A307 Grade B (higher strength than Grade A).

Stainless steel roofing bolts (for superior corrosion resistance).

Galvanized roofing bolts (heavier zinc coating for outdoor use).

If you need this bolt for a specific project, ensure the diameter, length, and washer type (if required) match your application. Let me know if you'd help sourcing or need further details!