Bulk 5/16-18 Indented Hex-Washer Head Taptite Alternative Thread-Rolling Screws, Full Thread, 410 Stainless, Passivated + Wax – Monster Bolts


Length: 200 Qty - 5/16-18 x 3/4"
Price:
Sale price$271.65

Description

MonsterBolts 5/16-18 indented hex-washer head 410 stainless Taptite thread-rolling screws bulk

Monster Overview:

Bulk 5/16-18 Indented Hex-Washer Head Taptite Alternative Thread-Rolling Screws from Monster Bolts pair a high-torque hex drive with an integrated washer that spreads load and protects finishes. Forged from hardened 410 stainless steel (martensitic, magnetic), these trilobular fasteners roll-form durable, reusable threads in untapped holes—saving time while delivering outstanding strength and vibration resistance in aluminum, mild steel, brass, and plastics.

The alloy is passivated & wax-coated for a clean surface, added lubricity, and RoHS-compliant corrosion protection. Ideal for equipment panels, HVAC frames, truck bodies, and general fabrication that demand stainless strength plus a secure flange-style head.

Monster Features:

  • High-Strength 410 SS: Heat-treated martensitic stainless outperforms 18-8 in hardness.
  • Thread-Rolling Efficiency: Creates internal threads in one step—no taps, chips, or secondary ops.
  • Indented Hex-Washer Head: Hex-washer (flange hex) drive spreads load without a separate washer.
  • Vibration Resistance: Interference fit & work-hardened threads keep joints tight under dynamic loads.
  • Lower Drive Torque: Trilobular profile and wax top-coat cut friction for faster installs.

Monster Specifications

Feature Details
Diameter / Thread 5/16-18 UNC
Available Lengths Fully threaded — select length above
Head / Drive Indented Hex-Washer (flange hex)
Point Style Taptite-style trilobular thread-rolling
Material 410 Stainless Steel (martensitic, magnetic)
Finish Passivated + Wax (RoHS)
System of Measurement US / Inch
Standards Meets ASME B18.6.3 & IFI thread-rolling screw guidelines

Also called hex-washer head, indented hex screw, or flange-hex screw, this drive style delivers high torque with a built-in washer—no separate hardware required.

More Monster Bolts:

Explore More Thread-Forming Options: Need other sizes or head styles? Browse our full Thread-Forming Screw Collection.

Need matching hardware? Bulk 5/16″ washers available here.

Order Yours Today and Experience the Monster Bolts Difference!

Buy with confidence! Every order from Monster Bolts is backed by our commitment to quality, fast shipping, and customer satisfaction.

Note: (PT) denotes partial-thread fasteners; all lengths in this listing are full-thread.

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