Description
Product Overview
Take on the toughest structural and industrial jobs with Bulk 5/8"-11 Grade 8 Hex Cap Screws plated in durable zinc yellow CR+3. These heavy-duty UNC-thread bolts are Made in the USA and manufactured to deliver high tensile strength, superior clamp load, and consistent performance in demanding environments such as construction, automotive repair, agricultural machinery, and fabrication.
Built to SAE J429 Grade 8 specifications, these fasteners provide the strength needed for critical joints. Their CR+3 chromate zinc finish enhances corrosion resistance while remaining RoHS compliant, making them suitable for production, OEM use, and regulated industries.
These screws are part of the Monster Bolts Made in USA Fasteners Collection, backed by fast Florida-based shipping and reliable customer support.
Key Features
- Size: 5/8"-11 UNC (coarse thread)
- Strength: High-strength Grade 8 alloy steel
- Finish: Zinc Yellow CR+3 for corrosion resistance and visibility
- Compliance: Fully RoHS compliant CR+3 plating
- Origin: 100% Made in USA
- Applications: Construction, industrial machinery, fabrication, farm equipment, automotive, heavy rigs
- Bulk Packaging: Monster Bolts bulk quantities offer the lowest cost per piece for individuals and businesses needing larger volumes.
Monster Specifications
| Specification | Details |
|---|---|
| Diameter | 5/8" (0.625") |
| Thread Size | 5/8"-11 UNC (coarse thread) |
| Head Style | Hex cap screw / hex bolt |
| Wrench Size | 15/16" 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 mechanical properties |
| System of Measurement | Inch / SAE |
| Lengths Available | Available in a range of 5/8-11 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 with compatible USA-made hardware:
- 5/8-11 hex nuts (USA-made, matching finishes)
- Flat & lock washers for load spreading and vibration control
- For lifting or marine applications, explore our USA-machined cable & rigging components
Why Choose Monster Bolts?
- Made in USA quality you can trust in critical applications
- Bulk savings with lower cost per piece
- Fast warehouse fulfillment from Florida
- Real expert support from a team that knows fasteners
Order Yours Today
Stock up on Made in USA 5/8-11 Grade 8 hex cap screws with a corrosion-resistant zinc yellow CR+3 finish. Select the length and quantity above and click "Add to Cart" to equip your shop with dependable UNC hardware.