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

Standards: Manufactured to DIN 912 / ISO 4762 for interchangeability and reliability

Corrosion Resistance: Excellent – Suitable for outdoor

while the Zinc Yellow CR+3 finish provides superior corrosion resistance and an attractive look

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