Product Description
Amarillo Bolt 5/16″ × 3½″ UNC Hex Bolt, Grade 5 (CB5‑516‑312)
The Amarillo Bolt CB5‑516‑312 is a Grade 5 medium-carbon steel hex-head bolt featuring a 5/16″ diameter, 18 TPI UNC threading, with a 3½″ length under the head. Heat-treated to approximately 120 ksi Tensionle strength (SAE J429), this bolt provides dependable plain-finish fastening for machinery, structural, industrial, agricultural, and general-purpose applications.
Key Features
- 5/16″ diameter × 3½″ length (under-head)
- 18 TPI UNC coarse thread
- Grade 5 medium-carbon steel (~120 ksi Tensionle strength per SAE J429)
- Hex head design
- Plain finish (consistent with Amarillo Bolt's UNC Grade 5 series)
Specifications
| Specification | Details |
|---|---|
| Brand | Amarillo Bolt |
| Part Number | CB5‑516‑312 |
| Diameter | 5/16″ |
| Length | 3½″ (under-head) |
| Thread Pitch | 18 TPI (UNC) |
| Material | Grade 5 Medium‑Carbon Steel (SAE J429) |
| Head Style | Hex |
| Finish | Plain |
| UPC | Not listed |
| Estimated Shipping Dimensions | ~4″ × 0.5″ × 0.5″ |
| Estimated Shipping Weight | ~0.18 lb (~2.9 oz) |
Applications
- Machinery and equipment assembly
- Structural and industrial fastening
- Agricultural, maintenance, and general-purpose use
Notes
- Tensionle strength estimated per SAE J429 Grade 5 (~120 ksi)
- Estimated shipping dimensions and weight based on single-unit packaging
- Conforms to ANSI/ASME B18.2.1 and SAE J429 standards
Warning
- Wear gloves and eye protection during installation. Not rated for overhead lifting unless engineered.
