Eaton FD43 — MIL-C-4109 Manual-Retract Air Coupler

The Eaton FD43 — MIL-C-4109 Manual-Retract Air Coupler is a air quick-disconnect coupling from Eaton's Aeroquip range. Manual-retract ball-latch industrial-interchange air coupler designed specifically for compressed air. Uses Eaton FD40 Series male tips. Protective collar prevents accidental snagging and disconnection.

Working pressure to 21 bar (305 psi) at the smallest body size, with minimum burst pressure of 560 bar. Manual Retract connection — valved (self-sealing poppet) variant.

Construction & features

• Interchange standard: MIL-C-4109
• Connection method: Manual Retract
• Valving: Valved (Self-sealing Poppet)
• Manual-retract ball latch — no accidental disconnect
• Protective collar prevents snagging in cluttered environments
• Uses Eaton FD40 Series male tips
• 360° swivel — eliminates hose kinking
• Neoprene seals
• Carbon steel zinc-plated body
• Available with SOCKETLESS™ hose end
• Interchanges with: MIL-C-4109 industrial interchange (uses FD40 male tips)

Available variants — specify in your RFQ

Indus quotes the full FD43 range; specify the configuration that matches your hose end and operating envelope. The Eaton part-number scheme is FD43-XXXX-AA-BB (series, half/material code, port thread size in 16ths of an inch, nominal coupling size in 16ths of an inch).

• Coupling halves: Female (uses FD40 male tips), SOCKETLESS™ hose end, Dust Cap/Plug
• Body sizes: 1/4", 3/8", 1/2"
• Body materials: Carbon Steel (zinc trivalent chromate plated)
• Seal materials: Neoprene
• Port thread types: Female NPT, Male NPT

Sample part numbers: FD43-1001-04-04, FD43-1001-06-06, FD43-1001-08-08, FD43-1011-04-04. The full part-number matrix is available on request — Indus will quote any standard configuration in the Eaton catalogue.

Performance

• Maximum operating pressure: 21 bar (305 psi) at the smallest size; derates with diameter
• Minimum burst pressure: 560 bar (8122 psi)
• Rated flow (largest size): up to 80 L/min
• Operating temperature range: -40°C to +100°C (varies by seal compound; specify in RFQ)

Applications

• Compressed air supply with anti-snag protection
• Pneumatic tool service in cluttered environments
• MIL-C-4109 industrial interchange

How to order

Confirm (a) the exact Eaton part number you require, or (b) the configuration parameters: coupling half (male / female / complete set / repair kit / dust cap), body size, port thread type and designation, seal compound, body material. Indus will quote ex-Eaton with full mill certification, NACE / ABS / Lloyd's options on request, and air-freight or sea-freight options to UAE / GCC. Standard lead time 14 days from order; in-stock items ship same week.

Companion products

Indus also stocks the matching dust caps, dust plugs, and seal repair kits for this series — ask for them on the same RFQ. For hose assemblies terminated with this coupler, request a complete hose-end assembly quote and we will supply the assembly tested at 1.5× working pressure with witness-test certificate.