Description
Overview:
The Hex Allen Key 5/32" Imperial is a compact L-shaped hand tool for turning imperial hex socket screws and bolts. Sized at 5/32 inch (approx. 3.97 mm across flats), it is suitable for tasks on machinery, equipment, and fixtures that use AF fasteners. Made from robust, hardened steel with a protective dark finish, it offers a secure fit and dependable torque transfer. The short arm design helps reach fasteners in tight or awkward spaces while giving good control for snug tightening. Commonly used across construction equipment, garden machinery, and workshop maintenance, it is supplied singly so you can replace the exact size you need. For easy reordering, it is identified by MPN 904 1639.
Key Features:
- 5/32 inch (3.97 mm) across flats size for imperial socket head screws
- Short arm pattern for better access in confined spaces and toolboxes
- Hardened steel construction for strength and long service life
- Precise hex profile to reduce cam-out and rounding of fasteners
- Corrosion-resistant dark finish for everyday workshop and site use
- L-shape provides leverage for controlled tightening and loosening
- Compatible with common imperial fixings on machinery and fixtures
- Sold individually to replace a single missing or worn size
- Light and compact for easy carry in pockets, pouches, or kits
- Clear identification: MPN 904 1639 for straightforward sourcing
Typical Applications:
Assembly and maintenance of garden machinery, small engines, and workshop equipment; adjusting guards, handles, and brackets on construction tools; bicycle component servicing; furniture assembly using imperial socket screws; fitting clamps, hinges, and jigs; general repairs where a 5/32 inch (3.97 mm) hex drive is specified.
Also known as:
Allen wrench, hexagon key, L-key, AF hex key, imperial hex driver, socket screw key, 5/32 in hex tool, 3.97 mm AF driver.
Product Specifications
| L&S Part No. | 904 1639 |
|---|---|
| Unit of Sale | 1 |
| Size | 5/32" |
| Key Features | - 5/32 inch (3.97 mm) size for imperial socket screws - Short arm design for access in confined spaces - Hardened steel for strength and durability - Corrosion-resistant dark finish for longevity - Sold individually for specific size replacement |


