Description
Monster Overview:
Fix your project right the first time with 5/16-12 Unslotted Indented Hex Washer Head Type 25 Thread-Cutting Screws from Monster Bolts. Designed for robust assemblies, these screws carve their own deep, coarse threads in drilled holes—reducing drive torque and minimizing stress on soft plastics, composites, and thin metals. The integrated washer head spreads load and protects the surface, while the indented hex drive delivers high torque with any standard 1/2" socket or wrench.
Zinc plating followed by a bake treatment relieves hydrogen embrittlement and provides dependable indoor corrosion protection while staying fully RoHS compliant. Every screw is produced to strict quality standards and ships fast from our U.S. warehouse with 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 eliminates the need for a separate flat washer.
- Zinc-Bake Finish: Zinc coating with post-bake treatment for embrittlement relief and durability.
- Low Drive Torque: Self-threading action eases installation and extends tool life.
Monster Specifications:
- Diameter / Thread: 5/16-12
- Length: Fully threaded (select available length from the drop-down above)
- Head Style: Unslotted indented hex washer
- Washer O.D.: 0.710" (nominal)
- Drive Size: 1/2" 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.