Latches

Hartwell manufactures a wide variety of latches and latch assemblies.  Hartwell’s various latches are qualified to the latest industry standards and are installed on a majority of the commercial aircraft flying today.  We have the knowledge and expertise to find the most innovative, cost effective and durable solution for your application.
flush handles, pin latches, hook latches, interiors, interior latches, door & access, pressure relief, rotary, hold down, tension shear, outer V band OVG, products.

Hook Latches

Features and Benefits: Hook Latches

• Free travel handle  
• Handle painted for visibility
• Adjustable hook or keeper to control preload
• Over-center locking 
• Trigger safety lock 
• Take-up
• Ultimate hook latch loads from 100 lbs.
• Low depth penetration 
• No special tools required (only a screwdriver or hex wrench)

Different Types

Sheet Metal Hook • Adjustable Hook
Single Link • Double Link • locking Hook
Heavy Duty Tool Operated

Flush Handles

Features and Benefits:  Flush Handles

• Trigger releases handle to operational position 
• Key lockable
• Special finishes (primer, polished metal, painted)
• Pressure sealed
• Handle and housing are contoured to the aircraft door configuration
• Pop-out, pull-out and tilt-out models have optional interior handles available 

Different Types

Small L Handle • Large L Handle
Large T Handle • Tilt Out Handle 
D Ring Handle  

Hold Down 

Features and Benefits: Hold Down

• No alignment required; 360° engagement or disengagement from the hook
• Latches with conventional NAS 622 Hook
• Preset clutch controls clamping force within 120 +/- 20 lbs. 
• Extractor pulls LRU out from the connector a minimum of .50 inches
• Hinge slot accommodates 3° extraction to prevent damage and 17° insertion for greater stability of the LRU while engaging the connector 
• Snag proof center shaft is fully enclosed by the easy grip knob during insertion or extraction 
• Easy grip knob for hand operation 
• Maximum HHD2 Series Weight is .13 lbs.

Pin Latches

Features and Benefits: Pin Latches

• Over-center locking 
• Free travel handles 
• Angular pin alignment 
• Optional tool operation

Different Types

• Narrow Series 
• Wide Series 
• Wide and Long 
• Reversible (Flip-Flop )
• Tool Operated 
• Rotary Sealed

Tension Shear

Features and Benefits: Tension Shear

• The lowest depth penetration and weight of any Tension Latch Trigger safety lock
• Two-piece handle for easy opening and as a flag for partially closed latches
• Tension adjustment at mold line with handle open 
• Attachment fitting provided 
• Shear loads supported along door abutment 
• Contoured to the aircraft configuration 
• Over-center locking 

Different Types

• Side Mount 
• Under Panel 

Outer V Band (OVG) 

Features and Benefits: 

• Provide take-up to fit the thrust reverser into a tongue and groove fitting
• Design to provide adjustment, high preloads and low hand operation  
• Fan cowl cannot be closed if latch is not fully engaged
• Over-center locking
• Dual coil safety springs 
• Adjustable preloads 
• Trigger safety lock 
• High Take-up

Different Types

• Single handle or folding handle
• Built in adjustment or separate keeper assembly
• Flush mounted or internally mounted

Interiors

Features and Benefits: 

• Hand operated
• Flush to application curvature 
• Automatic closing 
• Different finishes (painted, brushed aluminum, etc.)
• Cockpit Decompression

Different Types

• Curved Overhead Bin 
• Flat Overhead Bin 
• Emergency Exit

Door & Access 

Features and Benefits: Door Access

• Provide excellent shock and vibration characteristics 
• Exceptional strength to weight ratio 
• Gasket button in the Over-Center type latch offers superior sealing against internal and external hazards 
• The button serves as handle and indicator flag in the unlatched position, drilled or punched hole installation 

Different Types

• Over-Center
• Self-Closing 
• Trigger Lock
• Channel
• Tool Operated

Pressure Relief

Features and Benefits:

• Dual purpose latch – Safety and Quick Access 
• Release loads from 20 lbs. 
• 100% factory set and tested release loads 
• No special tools required (only a screwdriver to open)
• Calibrated compression or torsion spring series 
• Numerous trigger and bolt offsets available 

Different Types

• Compression Open Spring 
• Torsion Open Spring
• Adjustable Roller Type Closed
• Adjustable Roller Type Open 
• Combination Latch 
• Large Open Spring Latch
• Cockpit Decompression

Rotary 

Features and Benefits:  Rotary Latches

• Minimum skin cutouts 
• High strength to weight ratios 
• Mechanical lock incorporated in the latch 
• Reduced envelopes 
• Conventional operating tools (1/4 square drive)
• Take-up from 1/8”
• Incorporate a visual indicator showing if the  latch is open or closed 
• Ultimate loads from 1,500 lbs.
• Water proof latches available 

Different Types

• Under panel mounted 
• Side mounted

Keepers

Features and Benefits:  Keepers

• Mold line adjustable with latch in toggle, under load
• Insures proper preload Keepers all
• No special tools required (only a hex wrench or screwdriver)
• Ultimate tension loads up to 20,000 lbs. 

Different Types

• Front Mounted 
• Side Mounted 
• Rear Mounted