- +8613725562746
- info@cncpioneer.com
CNCPioneer manufactures AS9100D certified aerospace hydraulic fittings, pipe fittings, and hose fittings to AN, MS, AS, and NAS specifications — with tolerances to ±0.005mm, full FAIR documentation, and complete material traceability.
Aerospace fittings are precision-machined fluid system connection components used to join, route, seal, and control the flow of hydraulic fluid, fuel, pneumatic air, oxygen, and other process media throughout aircraft systems. They include aerospace hydraulic fittings for flight control and landing gear systems, aerospace pipe fittings for fuel and bleed air distribution, and aerospace hose fittings for flexible line termination.
Unlike commercial fluid fittings, aerospace fittings must perform without leakage or structural failure across extreme conditions — hydraulic pressures exceeding 5,000 psi, temperature cycling from -65°C to +260°C, sustained vibration loads, and fuel and hydraulic fluid immersion. Every dimension, material, thread form, and sealing surface finish is governed by MIL-F-18280, MS, NAS, and AN fitting specifications. CNCPioneer produces aerospace fittings across the full range of sizes and configurations, with full FAIR documentation for every part number.
CNCPioneer manufactures the complete range of aerospace fitting types — from standard AN and MS catalog fittings to custom-engineered specialty fittings for proprietary aircraft fluid systems.
Straight, elbow, tee, bulkhead, union, reducer, and swivel fittings for flight control, landing gear, thrust reverser, and brake hydraulic systems at 1,500–5,000 psi. Titanium and high-strength stainless for military high-pressure systems.
Tube end fittings, sleeve and nut assemblies, ferrule fittings, elbow, cross, tee, reducer, and adapter fittings for fuel, bleed air, pneumatic, and oxygen rigid tubing systems per AN, MS, and AS specifications.
Swaged and reusable hose end fittings, fire sleeve fittings, PTFE hose fittings, and high-pressure hose end fittings for AS1072, MIL-DTL-8794 hose assemblies and engine bay flexible line applications.
Fuel-compatible sealing materials, anti-static bonding provisions, and fire-resistant construction for fuel tank, fuel line, and engine fuel system connections in commercial and military aircraft.
High-temperature stainless steel and Inconel fittings for engine bleed air ducting operating at up to 500°C, plus fire suppression system distribution in engine nacelles and APU compartments.
Oxygen-compatible materials and certified cleaning procedures for aircraft oxygen system connections — eliminating hydrocarbon contamination risk in high-pressure oxygen system applications.
CNCPioneer manufactures aerospace fittings to all major military and aerospace fitting specifications. Our engineering team confirms dimensional compliance through FAIR documentation on every new part number.
AN818/AN819 flared tube fittings, AN833 elbow, AN924 coupling nut, AN929 end cap — the original military fitting standards still widely used for maintenance and replacement in commercial and military aircraft.
MS21922 flareless tube fittings, MS33649 straight thread O-ring boss, MS24392 flareless elbow, MS27183 union — military standard fittings with expanded configurations and higher-pressure ratings than the AN series.
AS4395 flareless tube fittings, AS1072 rubber hose assemblies, AS1055 fire-resistant hose assemblies — the current preferred SAE Aerospace Standards series for new commercial and military aircraft programs.
NAS1760 series high-pressure hydraulic fittings covering additional configurations and higher-performance ratings not addressed in the AN/MS/AS series — including military high-pressure hydraulic system applications.
MIL-DTL-8794 rubber hydraulic hose assemblies, MIL-H-8794 high-pressure hose assemblies, MIL-F-18280 fluid system tube fittings — military specifications governing hose fitting geometry, retention strength, and pressure integrity.
MS flareless fittings are compression-style Military Standard connectors designed for high-pressure, high-vibration aerospace and military.
CNCPioneer supplies AS9100D certified aerospace fittings to OEMs, Tier 1 fluid system suppliers, defense contractors, and MRO organizations across the full aerospace and defense supply chain.
Aerospace hydraulic, pipe, and hose fittings for Boeing, Airbus, and regional aircraft hydraulic, fuel, and pneumatic systems. Aluminum AN and MS catalog fittings for standard fluid system applications; titanium and stainless for high-pressure and corrosion-critical installations.
High-pressure titanium and stainless steel aerospace hydraulic fittings for military fighter, bomber, and rotorcraft hydraulic systems at 5,000 psi and above. Inconel fittings for engine bay high-temperature applications.
Aerospace fittings for missile propulsion system fluid lines, launch vehicle hydraulic actuator systems, and ground support equipment fluid system connections — full material traceability and AS9100D documentation.
Aerospace hydraulic fittings and hose fittings for helicopter flight control hydraulic systems, rotor brake systems, and auxiliary hydraulic power systems — with dynamic loading and vibration fatigue qualification.
Aerospace fittings for rocket propellant loading systems, hydraulic actuator systems, and ground support equipment — cryogenic fluid compatibility, outgassing compliance, and extreme temperature performance.
AN and MS catalog aerospace fittings for business jet and general aviation hydraulic, fuel, and pneumatic systems — cost-effective aluminum fittings with full AN/MS dimensional compliance and material certification.
CNCPioneer's Shenzhen facility operates 78+ Swiss CNC lathes and 66+ MAZAK mill-turn centers for aerospace fitting production, with dedicated AS9100D quality protocols governing thread form accuracy, sealing surface finish, and pressure-containing wall thickness dimensions.
78+ Swiss CNC lathes (Star, Citizen, Tsugami) and 66+ MAZAK mill-turn centers. Up to 9-axis simultaneous machining for complex multi-port fitting bodies, manifold blocks, and elbow configurations.
Thread pitch diameter ±0.005mm · Sealing surface Ra 0.4μm and finer · O-ring groove width and depth ±0.01mm · Wall thickness ±0.05mm · Concentricity ±0.003mm for cone seat geometry.
AN flared (AN818/AN819) · MS flareless (MS21922/AS4395) · Straight thread O-ring boss (MS33649/SAE J1926) · NPT/NPTF pipe threads · UNF/UNC — all verified by calibrated gauges and CMM.
Single prototype pieces through high-volume programs supplying millions of fittings per year. Typical FAIR qualification requires 3–10 first article samples; production programs have no minimum order quantity restriction.
Aluminum 2024-T351 / 6061-T6 / 7075-T6 · Stainless 303 / 304 / 316L / 17-4PH H900 · Titanium Ti-6Al-4V · Inconel 625 / 718 · Brass C3604 · Monel 400 — with AMS-compliant sourcing.
Full FAIR per AS9102 · CMM dimensional report · Material test reports with lot traceability · Thread gauge certifications · Plating and surface treatment certifications · Certificate of Conformance.
Aerospace fitting material selection is governed by fluid compatibility, operating pressure, temperature range, weight, and corrosion resistance. CNCPioneer machines all primary aerospace fitting materials with dedicated tooling and AMS-compliant sourcing.
Most-used aerospace fitting grade · AN/MS catalog hydraulic and fuel fittings · High strength · Good machinability
Good machinability, weldable, corrosion resistant · Low-pressure pneumatic and instrument fittings
Highest-strength aluminum · High-pressure lightweight hydraulic fittings · Weight-critical military applications
Good corrosion resistance · Good machinability · General purpose aerospace pipe and hose fittings
Excellent corrosion resistance · Fluid compatible · Oxygen, fuel, and chemical-resistant fitting applications
High strength · Excellent corrosion resistance · High-pressure hydraulic fittings · Military aircraft systems
High strength-to-weight · Excellent corrosion resistance · Weight-critical military hydraulic fittings · AMS 4928
Outstanding high-temperature corrosion resistance · Bleed air fittings · Engine bay high-temperature applications
High-temperature strength · Age-hardenable · HTHP engine and missile system fittings · AMS 5662
Excellent machinability · Good corrosion resistance · Low-pressure instrument fittings · Pneumatic system connectors
Excellent seawater and fuel corrosion resistance · Naval aerospace fittings · Fuel system specialty fittings
Silver plating for oxygen system fittings · PTFE for chemical-resistant hose fitting inner surfaces · Oxygen-compatible
Aerospace fittings require surface treatments meeting specific corrosion resistance, fluid compatibility, and MIL-specification requirements. CNCPioneer provides a comprehensive range of aerospace-qualified finishing options for all fitting types and base materials.
Type II and Type III hard coat anodizing for aluminum aerospace fittings. Type II for standard AN and MS catalog fittings; Type III for high-wear applications subject to abrasive contact. Available in clear and black for identification coding.
ASTM A967 and AMS 2700 compliant passivation for stainless steel aerospace pipe fittings, hydraulic fittings, and hose fittings. Removes free iron, enhances the chromium oxide layer for maximum corrosion resistance in fuel, hydraulic fluid, and atmospheric moisture environments.
Uniform corrosion and wear protection for complex aerospace fitting geometries including multi-port manifold blocks, elbow fittings, and tee configurations where plating thickness uniformity across all surfaces is critical for dimensional compliance after plating.
Alodine treatment for aluminum aerospace fittings requiring corrosion protection while maintaining electrical conductivity for aircraft grounding and bonding. Class 1A for maximum corrosion resistance; Class 3 for low-contact-resistance avionics grounding applications.
Silver plating for oxygen system fittings — providing the oxygen-compatible, low-friction surface required for reliable thread engagement and seal integrity in high-pressure oxygen connections. Electropolishing delivers ultra-smooth, contamination-free surfaces for high-purity fuel and oxygen system fittings.
Galvanically compatible corrosion protection for steel aerospace hydraulic fittings installed in aluminum aircraft structure — preventing galvanic corrosion between dissimilar metals. Zinc-nickel alternatives recommended where OEM specifications permit for environmental compliance.
Aerospace fitting surface finishing certifications — including anodizing, passivation, electroless nickel, and plating certifications — are provided with every fitting shipment as part of our AS9100D quality documentation package.
Aerospace fittings are pressure-containing, flight-critical components. CNCPioneer applies the full rigor of our AS9100D quality system to every fitting order — with specific controls targeting thread form accuracy, sealing surface finish, and pressure-containing wall thickness.
Engineering review of fitting drawing requirements, applicable AN/MS/AS/NAS specification dimensions, thread form specifications, sealing surface finish callouts, material and plating requirements, and FAIR requirements before order acceptance.
SII XRF composition verification confirms alloy compliance with AMS specifications; hardness testing verifies heat treatment condition; dimensional verification of bar stock; mill test reports retained with full lot traceability for every aerospace fitting order.
Complete CMM dimensional verification of all critical fitting dimensions — thread pitch diameter and form, sealing surface diameter and roundness, O-ring groove width and depth, wall thickness at pressure-containing sections, and port geometry — documented per AS9102.
Real-time dimensional monitoring of thread form and sealing surface dimensions during production; thread gauge verification at defined intervals; wall thickness monitoring for pressure-containing fitting sections; surface finish measurement on sealing surfaces before release.
Mitutoyo CMM full dimensional report; surface roughness verification on all sealing and thread surfaces; thread gauge verification per applicable AN/MS/AS thread standard; visual inspection for burrs, sharp edges, and surface defects on sealing surfaces and thread forms.
Material test reports with full lot traceability, CMM inspection reports, FAIR per AS9102, plating and surface treatment certifications, thread certification, and Certificate of Conformance packaged with every aerospace fitting shipment.
CNCPioneer's AS9100D certification is not a documentation exercise — it is the operational framework governing every aerospace fitting we produce, from contract review and material incoming inspection through in-process thread and sealing surface verification, FAIR documentation, and final shipment.
First Article Inspection Reports for all new aerospace fitting part numbers — balloon drawings, CMM dimensional results for all critical fitting dimensions, material certifications, thread gauge records, and plating certifications.
All aerospace fitting thread forms verified by calibrated thread plug and ring gauges and CMM pitch diameter measurement. For proprietary OEM thread forms, gauge availability is confirmed before production release.
Sealing surface Ra 0.4μm and finer on metal-to-metal sealing faces and cone seats, verified by surface roughness measurement documented in the CMM inspection report. O-ring groove surfaces achieve Ra 0.8μm or finer.
Material test reports with full lot traceability, CMM inspection report, FAIR per AS9102, plating and surface treatment certifications, thread certification, and Certificate of Conformance with every aerospace fitting shipment.
Common questions from aerospace OEMs, Tier 1 fluid system suppliers, and defense procurement teams about our AS9100D certified aerospace fittings manufacturing service.
AN (Army-Navy), MS (Military Standard), AS (Aerospace Standard), and NAS (National Aerospace Standard) are different specification series defining aerospace fitting dimensions, materials, and qualification requirements. AN fittings are the original military standards still widely used for maintenance and replacement. MS fittings updated and expanded the AN series with higher-pressure ratings. AS fittings are the current preferred SAE Aerospace Standards series for new aircraft programs. NAS fittings cover additional configurations and higher-performance ratings. CNCPioneer manufactures fittings to all four series and can cross-reference fitting part numbers across specification systems.
CNCPioneer machines all primary aerospace fitting thread forms including AN flared tube fitting threads (AN818/AN819), MS flareless tube fitting threads (MS21922/AS4395), straight thread O-ring boss (MS33649/SAE J1926), NPT and NPTF pipe threads, and UNF/UNC threads for fitting body connections. Thread accuracy is verified by calibrated thread plug and ring gauges and CMM pitch diameter measurement. For proprietary OEM thread forms, our engineering team reviews specifications during DFM and confirms gauge availability before production release.
For standard commercial aircraft hydraulic systems at 3,000 psi, aluminum 2024-T351 provides the best combination of weight, machinability, and cost for AN and MS catalog fittings. For military aircraft hydraulic systems at 4,000–5,000 psi where weight is critical, titanium Ti-6Al-4V provides the required strength with a significant weight advantage over stainless steel. For high-corrosion environments, stainless steel 17-4PH H900 or 316L are specified based on strength and corrosion resistance balance. Our engineering team provides free material selection guidance during DFM review.
We achieve Ra 0.4μm and finer on metal-to-metal sealing faces and cone seats for aerospace hydraulic fittings, verified by surface roughness measurement with results documented in the CMM inspection report. For O-ring groove sealing surfaces, we achieve Ra 0.8μm or finer as required by O-ring seal design standards. Consistent sealing surface finish across production lots is maintained by tooling management protocols and periodic surface finish verification during production.
Yes. First Article Inspection Reports per AS9102 are standard for all new aerospace fitting part numbers. Our FAIR package includes a balloon drawing referencing every drawing dimension, CMM measurement results for all critical fitting dimensions including thread form, sealing surface geometry, O-ring groove dimensions, and wall thickness, material certification with full lot traceability, plating and surface treatment certifications, and thread gauge verification records. FAIR reports are submitted for customer review and approval before production release.
For prototype quantities using in-stock aluminum 2024-T351 or stainless steel 316L, we deliver first article samples in 5–7 business days. Titanium and Inconel prototype fittings require 7–10 days depending on material availability. Production quantities are completed in 3–5 weeks depending on fitting complexity, material, surface finishing requirements, and order volume. Scheduled delivery programs with committed lead times are available for programs requiring dedicated production capacity.
Yes. CNCPioneer manufactures custom aerospace fittings to proprietary OEM drawings for Boeing, Airbus, Safran, Honeywell, Parker, Eaton, and other aerospace fluid system OEMs. Our DFM review covers thread form verification, sealing surface geometry optimization, wall thickness adequacy for rated pressure, and material and plating specification compliance. FAIR documentation per AS9102 is provided for all custom fitting part numbers before production release.
We accept orders from single prototype pieces through high-volume production programs supplying millions of fittings per year. For aerospace FAIR qualification programs, we typically produce 3–10 first article samples for dimensional verification before production release. Production programs have no minimum order quantity, though per-part economics favor volumes of 500 pieces and above for standard fitting configurations where setup amortization and material procurement efficiency are fully realized.
Upload your aerospace fitting drawing or CAD file and receive a free DFM review and competitive quote within 24 hours. CNCPioneer's aerospace engineering team will review your fitting design for manufacturability, confirm applicable AN/MS/AS/NAS specification compliance, identify critical thread form and sealing surface dimensions requiring special inspection controls, and provide a complete quotation including FAIR and AS9100D documentation requirements.