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The VALUE COLLECTION 3GBL9050308 is a hex head lag screw designed for structural fastening applications across HVAC, plumbing, electrical, and general construction trades. Built from AISI 1006 steel with a hot dipped galvanized finish, this lag screw measures 5/16 inches in diameter with a 3-1/2 inch length under head. The hot dipped galvanized coating provides corrosion resistance suited for outdoor and moisture-exposed installations. Manufactured to ASME B18.2.1 standards, it delivers consistent dimensional accuracy for code-compliant mechanical connections. Licensed tradespeople and contractors rely on this type of fastener for anchoring equipment supports, hangers, and structural framing members.
This lag screw is used across residential and light commercial applications where a heavy-duty threaded wood or structural fastener is required. Common installation scenarios include securing pipe hangers, conduit supports, equipment mounting brackets, duct supports, and wood-framed structural assemblies. The hex drive head allows for installation with standard hand tools or power drivers, making it practical for job site use in tight scheduling environments.
Designed as a standard hex head lag screw for use in wood, engineered lumber, and compatible structural framing materials where a 5/16 inch diameter lag fastener is specified.
Installation is typically performed by licensed HVAC technicians, plumbers, electricians, or general contractors as part of equipment or structural support work. A pilot hole should be drilled prior to driving the lag screw to prevent splitting and ensure proper seating. Use a correctly sized socket wrench or impact driver set to appropriate torque for the substrate material. Always follow applicable local building codes and manufacturer specifications for fastener spacing and load requirements.
We pulled together the parts most installs need for this unit, plus a few add-ons worth a look. Check what you need — nothing here blocks checkout.
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