1/4-20 x 1 1/2 Six Lobe Pan Floor Board Screw Type F Fully Threaded Black Phosphate PSW14410 The 6-lobe pan head offers

The 6-lobe pan head offers a wide bearing surface

These 10-24 x 3/8 Slotted Oval Machine Screws are fully threaded and made of zinc-plated steel

They are also commonly used in automotive

The head is an un slotted indented hex washer head

#8 External Tooth Lock Washer Zinc is a type of washer used to prevent nuts and bolts from loosening due to vibration or movement

1/4-20 x 1 1/2 Six Lobe Pan Floor Board Screw Type F Fully Threaded Black Phosphate PSW14410 The 6-lobe pan head offers1 4 20 x 1 1 2 Six Lobe Pan Floor Board Screw Type F Fully Threaded Black Phosphate This screw is designed for use in floor board applications. It has a 1 4 20 thread size and is 1 1 2 inches long. The six lobe pan head provides a secure hold and prevents the screw from slipping. The fully threaded design ensures maximum holding power. The black phosphate finish provides corrosion resistance and a professional appearance.