Description
Monster Overview:
Fix your project right the first time with 3/8-12 Unslotted Indented Hex Washer Head Type 25 Thread-Cutting Screws from Monster Bolts. Crafted for heavy-duty assemblies, these 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 indented hex washer head supplies ample bearing surface and high drive torque with any standard 9/16" socket or wrench, while the built-in washer eliminates the need for a separate flat washer.
Zinc plating followed by a bake treatment relieves hydrogen embrittlement and provides reliable indoor corrosion protection while remaining fully RoHS compliant. Every order ships fast from our U.S. warehouse and is 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 and high torque drive with a standard socket—no slots to strip.
- Integrated Washer: Distributes load and protects material; no separate washer required.
- Zinc-Bake Finish: Zinc coating plus post-bake treatment for embrittlement relief and durability.
- Low Drive Torque: Self-threading action eases installation and extends tool life.
Monster Specifications:
- Diameter / Thread: 3/8-12
- Length: Fully threaded (select available length from the drop-down above)
- Head Style: Unslotted indented hex washer
- Washer O.D.: 0.870" (nominal)
- Drive Size: 9/16" 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—perfect 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.