Description
Product Overview
Get reliable precision fastening with Bulk 3/8"-24 Grade 8 Hex Cap Screws in a durable zinc yellow CR+3 plating. Manufactured in the USA for consistency and strength, these fine-thread UNF bolts provide superior vibration resistance and finer adjustment control compared to 3/8-16 coarse-thread hardware.
Produced from high-strength alloy steel and built to SAE J429 Grade 8 standards, these screws deliver the performance needed for automotive assemblies, industrial equipment, tools, fixtures, and high-precision machinery. The CR+3 zinc yellow coating provides corrosion resistance while remaining RoHS compliant, ensuring compatibility with modern environmental regulations.
These fasteners are part of our Made in USA Fasteners Collection, shipping quickly and backed by Monster Bolts’ industry-leading service.
Key Features
- Size: 3/8"-24 UNF (fine thread)
- Strength: High-strength Grade 8 alloy steel
- Thread Style: UNF fine thread for greater vibration resistance and fine-tuning capability
- Finish: Zinc Yellow CR+3 for corrosion protection and enhanced visibility
- Compliance: CR+3 plating is RoHS compliant
- Origin: Made in USA for traceable, reliable quality
- Applications: Automotive, machinery, fixtures, tooling, and precision equipment
- Bulk Packaging: Monster Bolts bulk quantities offer the lowest cost per piece for individuals and businesses needing larger volumes.
Monster Specifications
| Specification | Details |
|---|---|
| Diameter | 3/8" (0.375") |
| Thread Size | 3/8"-24 UNF (fine thread) |
| Head Style | Hex cap screw / hex bolt |
| Wrench Size | 9/16" hex wrench/socket |
| Material | Alloy steel, Grade 8 |
| Finish / Plating | Zinc yellow CR+3 (chromate-converted zinc), RoHS compliant |
| Country of Origin | Made in USA |
| Standards | ASME B18.2.1 dimensions; SAE J429 Grade 8 properties |
| System of Measurement | Inch / SAE |
| Lengths Available | Available in common 3/8-24 lengths; select above. |
| Packaging | Monster Bolts bulk quantities offer the lowest cost per piece for individuals and businesses needing larger volumes. |
Matching Nuts & Washers
Pair these 3/8-24 bolts with complementary USA-made hardware:
- Fine-thread 3/8-24 hex nuts available in the USA Fasteners collection
- Flat & lock washers for proper bearing surface and vibration resistance
- For marine & rigging uses, see our USA-machined cable & rigging components
Why Choose Monster Bolts?
- Made in USA quality for critical applications
- Best bulk value with lower cost per piece
- Fast shipping from our Florida warehouse
- Expert support from fastener specialists
Order Yours Today
Stock up on Made in USA 3/8-24 Grade 8 hex cap screws in zinc yellow CR+3 finish. Select your required length and quantity above and click "Add to Cart" to keep your operation supplied with dependable UNF hardware.