Product Description
UNC Grade 5 Zinc Plated Serrated Flange Bolts – Fully Threaded
Fully threaded UNC flange bolts manufactured from Grade 5 high tensile steel with a zinc plated finish. Available in 1/4", 5/16" and 3/8" thread sizes, these bolts feature a hexagon head with an integral serrated flange.
The flange spreads the clamping load over a wider area, while serrations beneath the head grip the mating surface to help resist loosening.
Technical Specifications
| Material | High tensile steel |
|---|---|
| Strength grade | Grade 5 |
| Finish | Zinc plated |
| Thread type | UNC – Unified National Coarse |
| Thread coverage | Fully threaded |
| Head style | Hexagon with integral flange |
| Flange underside | Serrated on all sizes |
Thread Sizes and TPI
| Thread Size | Threads Per Inch | Thread Designation |
|---|---|---|
| 1/4" | 20 TPI | 1/4"-20 UNC |
| 5/16" | 18 TPI | 5/16"-18 UNC |
| 3/8" | 16 TPI | 3/8"-16 UNC |
Key Features
- Grade 5 high tensile steel construction.
- Integral flange provides a broad bearing surface.
- Serrations beneath the flange help resist rotation against the mating surface.
- Fully threaded for use with matching UNC nuts or tapped holes.
- Zinc plating helps protect the steel against corrosion.
Size Selection
Sizes are stated as thread diameter x length. Length is measured from beneath the head to the tip. Choose the required thread size, length and pack quantity from the available options.
Applications
Suitable for machinery, brackets, equipment assembly and general maintenance requiring imperial coarse-thread flange fasteners. Serrations can mark the contact surface, so consider the mating material and finish when choosing your fixing.
