Eaton TB015519S4-8D - Style II Bulkhead Half, Size -8

The Eaton TB015519S4-8D is a Style II bulkhead mounting half from the proven Aeroquip 145/155 Series self-sealing coupling line, sized -8 (1/2" tube OD) with a 3/4-16 UNJF thread and rated for 3000 PSI operating pressure. Engineered for MIL-H-5606 and MIL-H-83282 red oil hydraulic systems, this quick disconnect coupling half is the industry standard for aircraft ground service applications and is qualified to SAE AS5440 for Type II hydraulic system use.

Key Features

• Style II configuration with AS4395 × AS4395 flared end fittings
• Bulkhead mounting half with integral flange and lockspring assembly
• Quick-lead blunt start threads for simple hand connection
• Ratchet-tooth union nut lock engages lockspring for positive locking under extreme vibration
• Self-sealing design limits fluid loss during disconnection
• Automatic lock release during disconnection
• Over 60 years of proven service history on virtually all U.S. Military aircraft

Specifications

• Series: Aeroquip 145/155 Self-Sealing Coupling
• Size: -8 (1/2" tube OD)
• Thread: 3/4-16 UNJF
• Operating Pressure: 3000 PSI
• Fluid: MIL-H-5606 / MIL-H-83282 (red oil hydraulic fluid)
• Mating Hose Attaching Half: 155S5-8D
• Performance: Meets MIL-DTL-25427A requirements
• Qualification: SAE AS5440 Type II (-65°F to +275°F)
• Weight: 0.386 lbs (0.175 kg)

Compatible Dust Cap and Plug

To protect the coupling from contamination during disconnection, the TB015519S4-8D is compatible with the following Aeroquip dust cap and plug assemblies for red oil hydraulic applications:

• Dust Cap: 155S7-8D
• Dust Plug: 155S9-8D

Note: Union nut, lock springs, flange, dust plug, and dust cap size 8 is used on coupling half sizes 6 and 8.

Applications

The Eaton Aeroquip TB015519S4-8D is widely used across aircraft and ground support equipment (GSE) hydraulic systems, including landing gear, flight control, brake, and utility hydraulics on both military and commercial platforms. Its self-sealing quick disconnect function makes it ideal for ground servicing, hydraulic test stands, hydraulic power units (HPUs), and any MRO application requiring rapid, leak-free connection and disconnection of MIL-H-5606 or MIL-H-83282 fluid lines. A&P mechanics, MRO technicians, and aviation maintenance teams rely on the 145/155 Series for dependable performance under vibration, pressure cycling, and wide operating temperature ranges.