Bulk 5/16"-18 Flat Head 6-Lobe / T-40 Floorboard Thread Cutting Screws (Type F) – Phosphate – Monster Bolts undercut these screws offer reliable corrosion

these screws offer reliable corrosion resistance for indoor and light exterior use

Choose Zinc CR+3 Drop-In Anchors with Setting Tool from Monster Bolts for medium to heavy-duty anchoring in solid concrete

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Size: 5/16"-18 UNC (coarse thread)

Bulk 5/16"-18 Flat Head 6-Lobe / T-40 Floorboard Thread Cutting Screws (Type F) – Phosphate – Monster Bolts undercut these screws offer reliable corrosionMonster Overview: Fix your project right the first time with Bulk 5 16" 18 Flat Head 6 Lobe T 40 Thread Cutting Screws (Type F) from Monster Bolts. These screws are commonly used in floorboard and heavy duty structural applications, where a flush finish and high drive torque are required. The Type F thread cutting design cuts clean internal threads rather than rolling them, making these fasteners ideal for steel and harder materials. The flat head