Description
Product Overview
Equip your projects with Bulk 1/4"-28 Grade 8 Hex Cap Screws in a durable zinc yellow CR+3 finish, Made in USA and packed in Monster Bolts bulk cartons. These fine-thread UNF bolts are ideal when you need strong clamp load and tighter adjustment control than coarse-thread 1/4-20 hardware—perfect for machinery, fixtures, automotive work, and precision assemblies.
Manufactured from premium alloy steel to Grade 8 mechanical properties and coated with chromate-converted zinc (CR+3), these hex cap screws deliver reliable strength, corrosion resistance, and high visibility in shop or field environments. The CR+3 yellow zinc plating is RoHS compliant, aligning with modern environmental and compliance requirements.
As part of the Monster Bolts Made in USA fasteners collection, these 1/4-28 hex cap screws ship quickly from Florida and are backed by our focus on consistent quality and customer support.
Key Features
- Size: 1/4"-28 UNF (fine thread) hex cap screws.
- Strength: High-strength Grade 8 alloy steel for demanding bolted joints.
- Thread Type: Fine-thread UNF for better adjustment control and vibration resistance compared to coarse threads.
- Finish: Zinc yellow CR+3 for corrosion resistance, visibility, and a clean professional appearance.
- Compliance: CR+3 zinc finish is RoHS compliant.
- Origin: Made in USA for consistent manufacturing and traceability.
- Application: Ideal for machinery, automotive, jigs/fixtures, tooling, and precision equipment.
- Bulk Packaging: Monster Bolts bulk quantities offer the best price-per-piece for individuals and businesses needing larger volumes.
Monster Specifications
| Specification | Details |
|---|---|
| Diameter | 1/4" (0.250") |
| Thread Size | 1/4"-28 UNF (fine thread) |
| Head Style | Hex cap screw / hex bolt |
| Wrench Size | 7/16" hex wrench/socket (standard) |
| Material | Alloy steel, Grade 8 |
| Finish / Plating | Zinc yellow CR+3 (chromate-converted zinc), RoHS compliant |
| Country of Origin | Made in USA |
| Standards | Typically conforms to ASME B18.2.1 hex cap screw dimensions and SAE J429 Grade 8 mechanical properties. |
| System of Measurement | Inch / SAE |
| Lengths Available | Offered in a range of common 1/4-28 lengths. Please select your required length from the dropdown menu above. |
| Packaging | Bulk MonsterBULKS cartons (full-box counts). Quantity options shown in the size/quantity selector. |
Matching Nuts & Washers
Complete your assembly with Made in USA nuts and washers sized for 1/4-28 UNF threads:
- Matching Hex Nuts: Pair these bolts with USA-made fine-thread hex nuts for 1/4-28 hardware. Browse compatible options in our Made in USA fasteners collection.
- Flat & Lock Washers: Add flat washers and lock washers for improved load distribution and vibration resistance. Matching USA-made washers are also available under the same collection.
- For cable rigging and marine lift hardware, see our USA-machined cable & rigging components.
Why Choose Monster Bolts for Made in USA Grade 8 Fasteners?
- Made in USA focus: Strong traceability and consistent quality for critical applications.
- Industrial-ready bulk: MonsterBULKS cartons sized for shops, production lines, and field crews.
- Fast shipping: Ships quickly from our Florida warehouse.
- Responsive support: Real help from a fastener-focused team when you need it.
Order Yours Today
Keep your shop and jobsite ready with reliable, Made in USA 1/4-28 Grade 8 hex cap screws in zinc yellow CR+3 finish. Choose your preferred length and bulk quantity above and click "Add to Cart" to stock up on high-strength UNF hardware you can trust.