Lightweight Bulk 5/16″-18 Unslotted Indent Hex-washer Head Thread-cutting Screws — Type F, 18-8 Stainless Steel Set [PO85XjaF]

Monster Overview:

Built for outdoor steel framing, trailer decks and heavy timber-to-steel joints, these 5/16″-18 Unslotted Indent Hex-Washer Head Thread-Cutting Screws are machined from corrosion-proof 18-8 (304) stainless steel. The wide-flange hex head drives fast with a 7/16″ nut setter, while the Type F fluted point taps its own female threads in mild steel or dense hardwood—no pilot holes, nuts or chip clean-up. Passivated stainless plus a factory dry-wax film deliver low, repeatable drive torque and decades of rust-free service. Supplied in bulk master cartons to keep your per-piece cost monster-low.

Monster Features:

• Head / Drive: One-piece unslotted indent hex-washer (7/16″ AF) — nothing to clog with chips; captive washer spreads load.
• Type F Cutting Point: UNC machine thread with fluted slot — perfect for 0.060 – 0.200″ steel plate or tough hardwood planks.
• Material Advantage: 18-8 stainless is non-magnetic, food-safe and resists coastal or chemical corrosion.
• Finish: Passivated + factory dry-wax lubricant (silicone-free) for consistent clamp load.
• Bulk Packaging: Sealed master cartons — ideal for dock builders, stainless fabrication shops & trailer manufacturers.

Monster Specifications:

• Diameter / Thread: 5/16″-18 UNC, Type F cutting point
• Head Style: Unslotted indent hex-washer (integral flange)
• Drive Size: 7/16″ hex
• Material: 18-8 (304) stainless steel — passivated
• Finish: Factory-applied dry-wax
• Cross-Reference: SAE J476 Type F / IFI 136

More Monster Bolts:

• Need other stainless Type F sizes? • Looking for PT / Plastite thread-formers? Explore the full inch-series lineup.

Order Yours Today & Feel the Monster Bolts Difference!

Every bulk carton ships fast from our U.S. warehouse and is backed by Monster Bolts’ quality guarantee and responsive support.