5/16” X 3” HEX LAG SCREW, ZINC PLATED
| Weight | 0.054375 |
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5/16” X 3” HEX LAG SCREW, ZINC PLATED
Engineered for robust connections in wood and masonry, this 5/16” x 3” hex lag screw provides superior holding power for demanding construction and fabrication projects. Its hex head allows for high-torque installation with standard wrenches, while the zinc plating offers reliable corrosion resistance for lasting durability.
- Low Carbon Steel
- Meets ASTM A307 Specifications
- Zinc Plated per ASTM B633
- Structural Wood Fastening
This industrial-grade hex lag screw is forged from low carbon steel, conforming to the strength and material requirements of ASTM A307. This standard ensures reliable performance for light to medium-duty structural applications. The fastener features a coarse thread pitch designed to bite securely into wood fibers, creating a strong, pull-out resistant connection. The integrated hex head is engineered for easy installation with standard sockets or wrenches, providing the leverage needed to draw structural members together tightly. The entire screw is coated with a zinc-plated finish for enhanced protection against rust and corrosion.
Ideal for contractors, fabricators, and MRO professionals, these 5/16-inch diameter lag screws are used extensively in wood-frame construction, deck building, and landscape timber projects. They are perfect for fastening ledgers to rim joists, securing heavy fixtures, and assembling large wooden structures. The 3-inch length provides substantial embedment for secure anchoring in both dimensional lumber and concrete (when used with a lag shield). Bobco Metals offers these versatile fasteners for same-day pickup from our Los Angeles warehouse, supporting time-sensitive construction and repair jobs.
Specifications
- Material: Low Carbon Steel
- Standards: ASTM A307, ASTM B633 (for plating)
- Strength/Tensile: Approx. 60,000 psi minimum (per ASTM A307)
- Dimensions: Diameter: 5/16", Length: 3", Hex Head
- Finish: Zinc Plated
- Certifications: Material Test Reports (MTR) available upon request.
Applications
- Construction: Securing deck ledgers, framing, and post-and-beam connections.
- Fabrication: Assembling heavy-duty wood crates, supports, and industrial shelving.
- Outdoor Projects: Building retaining walls, playground equipment, and landscape structures.
- MRO (Maintenance, Repair, Operations): Repairing wooden structures, anchoring machinery to wood floors.
Target Users
This product is essential for general contractors, framing carpenters, deck builders, and maintenance teams requiring a high-strength fastener for structural wood applications.
Finish Options
This lag screw comes standard with a clear zinc-plated finish (per ASTM B633) for good corrosion resistance in dry or interior environments. For applications requiring superior protection against outdoor elements, Hot-Dip Galvanized (HDG) or stainless steel options may be available via special order. Contact our Los Angeles sales team for details on alternative finishes.
How to Measure
Lag screws are specified by their diameter and length. The diameter (e.g., 5/16") refers to the major diameter of the threaded shank. The length (e.g., 3") is measured from the underside of the hex head to the tip of the screw.
Example: To order this specific product, request a "5/16-inch by 3-inch Hex Head Lag Screw, Zinc Plated".
Order Checklist
- Product name and required dimensions
- Grade/material specification and quantity
- Cutting instructions (if applicable)
- Surface finish requirements
- Certifications required (Mill Test Report - MTR)
- Special handling or delivery requirements
Quick Facts
- Product
- 5/16” X 3” HEX LAG SCREW, ZINC PLATED
- Material
- Low Carbon Steel
- Standards
- ASTM A307, ASTM B633
- Key Properties
- Hex head for high torque, coarse thread for wood, zinc plated for corrosion resistance.
- Primary Applications
- Wood Construction, Deck Building, Framing
- Location
- Los Angeles warehouse - Same-day pickup available
Available Sizes
We stock a wide range of industrial-grade lag screws in diameters from 1/4" to 3/4" and lengths from 1" to 12". Bulk quantities are available for pickup at our Los Angeles warehouse. Other finishes like Hot-Dip Galvanized may be available.
Custom sizes and cutting services are available.
Contact for Sizing-
5/16” X 3” HEX LAG SCREW, ZINC PLATED$0.49
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