About Hex Keys

Hex keys, also known as Allen wrenches or Allen keys, are L-shaped hand tools used to drive hex socket fasteners on aircraft, engines, avionics enclosures, GSE, and aircraft tooling during maintenance and assembly operations.

What Hex Keys Should You Choose for Aircraft and Aviation Maintenance?

Hex keys are used throughout aircraft maintenance for driving socket head cap screws, set screws, and hex socket fasteners found on airframe panels, avionics racks, engine components, and ground support equipment. L-shaped hex wrenches give the technician two grip options: the short arm for high-torque applications and the long arm for faster driving and reach into recessed or hard-to-access fastener locations. Metric hex keys cover the fastener profiles used on European and modern aircraft platforms, while SAE hex keys are standard for legacy and domestic aircraft systems. For aviation toolrooms and shop kits, having both metric and SAE hex key sets on hand is a practical requirement for general maintenance readiness.

PJi® carries hex keys from GripEdge Tools, including long metric hex keys and long SAE hex keys designed for aviation maintenance use. GripEdge hex keys are built with precision-machined ball ends where applicable and durable alloy steel construction suited for repeated use in hangar, line, and shop environments. These tools are appropriate for A&P mechanics, MRO technicians, FBO toolrooms, and maintenance operations that need dependable, correctly sized hex wrenches available for daily aircraft service tasks.

If you need help selecting hex keys, Allen wrenches, or related aircraft hand tools for your operation, our team is available by phone, email, or chat to provide expert recommendations and dependable support.