Product Description
Amarillo Bolt ⅜″ × 3½″ UNC Hex Bolt, Grade 5 (CB5‑38‑312)
The Amarillo Bolt CB5‑38‑312 is a Grade 5 medium-carbon steel hex-head bolt featuring a ⅜″ diameter, 16 TPI UNC threading, and a 3½″ under-head length. Heat-treated to deliver approximately 120 ksi Tensionle strength, it offers sturdy fastening for machinery, structural, industrial, and general-purpose applications.
Key Features
- ⅜″ diameter × 3½″ length (under the head)
- 16 TPI UNC threading—standard coarse thread
- Grade 5 medium-carbon steel—quenched and tempered (~120 ksi Tensionle strength)
- Hex head for easy wrench or socket installation
Specifications
| Specification | Details |
|---|---|
| Brand | Amarillo Bolt |
| Part Number | CB5‑38‑312 |
| Diameter | ⅜″ |
| Length | 3½″ (under-head) |
| Thread Pitch | 16 TPI (UNC) |
| Material | Grade 5 Medium‑Carbon Steel (ASTM A307) |
| Head Style | Hex |
| Finish | Plain |
| UPC | Not listed |
| Estimated Shipping Dimensions | ~4″ × 0.75″ × 0.75″ |
| Estimated Shipping Weight | ~0.27 lb (~4.3 oz) |
Applications
- Machinery and equipment assembly
- Structural and industrial fastening
- Maintenance, agricultural, and general hardware use
Notes
- Grade 5 bolt Tensionle strength ~120 ksi (SAE J429)
- Weight estimate based on standard density (~0.073 lb per inch)
- Packaging estimate assumes single-piece shipping
- Complies with ANSI/ASME B18.2.1 and SAE J429 standards
Warning
- Wear gloves and eye protection during installation. Not rated for overhead lifting unless engineered.
