Description
Monster Overview:
Fix your project right the first time with #8-18 × 3/8" Unslotted Indented Hex Washer Head Type 25 Thread-Cutting Screws from Monster Bolts. These compact fasteners carve their own deep, coarse threads in drilled holes—reducing drive torque and preventing stress cracks in soft plastics, composites, and thin metals. The integrated washer head spreads load, while the indented hex drive delivers high torque using any standard 1/4" socket or wrench.
Every screw receives a zinc coating followed by a bake treatment to relieve hydrogen embrittlement, providing dependable indoor corrosion protection with full RoHS compliance. Orders ship fast from our U.S. warehouse and are backed by industry-leading support.
Monster Features:
- Type 25 Point: Cuts clean, gripping threads without cracking or splitting plastic.
- Indented Hex Washer Head: Large bearing surface & high-torque drive—no slots to strip.
- Integrated Washer: Distributes load and protects the work surface; no separate washer needed.
- Zinc-Bake Finish: Zinc plating plus bake treatment for embrittlement relief and long-term durability.
- Low Drive Torque: Self-threading action eases installation and extends tool life.
Monster Specifications:
- Diameter / Thread: #8-18
- Length: 3/8" (fully threaded)
- Head Style: Unslotted indented hex washer
- Washer O.D.: 0.370" (nominal)
- Drive Size: 1/4" hex
- Material: Carbon steel
- Finish: Zinc plated & baked
- Standards: ASME B18.6.3 / SAE J1237 Type 25
More Monster Products:
Working exclusively in plastics? Explore our bulk PT / EJOT thread-forming screws—ideal when you need high pull-out strength without pre-tapping. 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.