Product Description
114-Piece A2 Stainless Steel UNF Fully Threaded Hex Bolt Kit
A 114-piece assortment of A2 stainless steel fully threaded hexagon head bolts, also known as hexagon set screws. Includes 1/4″, 5/16″ and 3/8″ UNF sizes in eleven diameter and length combinations for imperial-thread assembly, maintenance and repair work.
Supplied in a clear plastic storage box with a clip-down lid for convenient identification and storage.
Specifications
| Total contents | 114 bolts |
|---|---|
| Material | A2 stainless steel |
| Head style | External hexagon |
| Thread type | UNF — Unified National Fine, right-hand |
| Thread coverage | Fully threaded |
| Nominal diameters | 1/4″, 5/16″ and 3/8″ |
| Length range | 5/8″ to 1 1/4″ across the assortment |
| Storage | Clear plastic box with clip-down lid |
Thread and Spanner Sizes
| Thread Size | Threads Per Inch | Spanner Size Across Flats |
|---|---|---|
| 1/4″ UNF | 28 TPI | 7/16″ |
| 5/16″ UNF | 24 TPI | 1/2″ |
| 3/8″ UNF | 24 TPI | 9/16″ |
Kit Contents
| Thread Size | Bolt Length | Metric Length Equivalent | Quantity |
|---|---|---|---|
| 1/4″-28 UNF | 5/8″ | 15.875mm | 10 |
| 1/4″-28 UNF | 3/4″ | 19.05mm | 10 |
| 1/4″-28 UNF | 1″ | 25.4mm | 15 |
| 1/4″-28 UNF | 1 1/4″ | 31.75mm | 15 |
| 5/16″-24 UNF | 5/8″ | 15.875mm | 10 |
| 5/16″-24 UNF | 3/4″ | 19.05mm | 10 |
| 5/16″-24 UNF | 1″ | 25.4mm | 12 |
| 5/16″-24 UNF | 1 1/4″ | 31.75mm | 12 |
| 3/8″-24 UNF | 3/4″ | 19.05mm | 10 |
| 3/8″-24 UNF | 1″ | 25.4mm | 5 |
| 3/8″-24 UNF | 1 1/4″ | 31.75mm | 5 |
| Total | 114 | ||
Bolt lengths are measured from beneath the hexagon head to the tip.
Key Features
- 114 A2 stainless steel bolts in one assortment.
- Three imperial fine-thread diameters.
- Fully threaded bodies for use with matching nuts or tapped holes.
- Eleven diameter and length combinations.
- Clear storage box with clip-down lid.
Typical Applications
Vehicle restoration, machinery maintenance, workshop repairs and general assemblies requiring UNF stainless steel fixings.
Installation
Match both the diameter and TPI to the mating thread. Start by hand and tighten steadily with the correct imperial spanner or socket. Use suitable stainless steel anti-seize where specified, allowing for its effect on tightening torque.
Standards
- ASME B18.2.1 — dimensional reference for imperial hexagon head bolts and set screws.
- ASME B1.1 — Unified inch thread reference.
