3/8" Hex Lag Screws – Zinc Plated Steel

ASTM A307 Grade A Compliant – Cr+3 RoHS Compliant

Equip your heavy-duty projects with 3/8" Zinc Plated Hex Lag Screws from Monster Bolts. These industrial-grade lag bolts are built from ASTM A307 Grade A steel and finished with Cr+3 zinc plating for reliable corrosion resistance. Ideal for structural assemblies, machinery mounting, and construction applications requiring both strength and longevity.

Key Specifications (Industrial Grade)

• Diameter: 3/8 inch
• Thread Size: 7 Threads Per Inch (7 TPI)
• Wrench Size (Across Flats): 9/16 inch
• Type: Hex Lag Screw (also known as Lag Bolt)
• System of Measurement: Inch (Imperial / US)
• Material: Zinc Plated Steel ASTM A307 Grade A, Cr+3 RoHS Compliant
• Specifications: Conforms to ASME B18.2.1

Performance & Material Advantages

• Industrial Strength: Heavy-duty A307 Grade A carbon steel delivers consistent shear and tensile performance in structural and equipment installations.
• Zinc Corrosion Protection: Cr+3 plating guards against oxidation and surface rust in shop, warehouse, and outdoor environments.
• RoHS Compliant: Environmentally safe finish meeting Cr+3 requirements for reduced environmental impact.
• Dimensional Accuracy: Manufactured to ASME B18.2.1 standards for precise fit and dependable assembly alignment.

Ideal Applications

• Structural wood-to-metal connections
• Heavy framing and bracing assemblies
• Equipment and machinery mounting
• Warehouse and industrial build-outs
• High-load fastening in commercial construction

Installation Tips

• Pre-drill pilot holes to prevent splitting and ensure clean thread engagement.
• Use a 9/16" wrench or socket for accurate torque application.
• For industrial use, verify torque requirements per job specifications or building code.
• Maintain full thread engagement for optimal shear strength and load transfer.

Order Yours Today

Choose 3/8" Zinc Plated Hex Lag Screws for industrial, commercial, and structural applications demanding proven strength and durability. Backed by Monster Bolts’ reputation for quality, fast shipping, and exceptional customer service.

✔️ ASTM A307 Grade A industrial-grade steel construction

✔️ Zinc-plated for reliable corrosion resistance

✔️ Trusted by contractors, builders, and equipment manufacturers