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666/667

666/667
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666/667

Product catalog summary
General Characteristics
Eaton's Aeroquip 666/667 medium pressure PTFE hose is designed for hydraulic and pneumatic applications up to 1500 psi. It is resistant to various chemicals and reinforced with stainless steel wire for durability and flexibility.
Compression Crimp Fittings
Available in flared and flareless types, these fittings feature a unique design for superior retention under pressure.
Protective Sleeves
Recommended for abrasion protection, options include silicone-coated firesleeves and nylon spiral wraps.
Chemical Resistance and Application Data
Suitable for hydrocarbon fuel and missile fluid systems, operating effectively from -65°F to +450°F.
Specifications
Complies with MIL-H-25579 standards for high-temperature lines in aircraft and missile systems.
Construction
Features a PTFE inner tube and stainless steel reinforcement, with options for single or double wire braid covers.
Overview
This document provides technical specifications and assembly instructions for Eaton Aerospace Group's hose assemblies and fittings, focusing on configurations, materials, and standards.
Specifications
  • Conforms to MS8005 and MS8006 standards, indicating compliance with MIL-DTL-25579.
  • Fittings made from corrosion-resistant steel (CRES).
Procedures
  • Assembly part numbers specify rotational angle for double elbow assemblies.
  • Fittings designed for assembly to a gap dimension without additional lubrication.
Standards and Recommendations
  • All assemblies must meet MIL-DTL-25579 and MIL-DTL-27272 requirements.
Key Data from Tables
  • Details on part numbers, dimensions, and pressure ratings.
Critical Information
  • Fittings include a socket, sleeve, and nipple assembly with adjustable elbows.
Assembly Procedures
  1. Wrap hose with tape, cut squarely, and clean the bore.
  2. Insert sleeve over the inner tube and under the wire braid.
  3. Push hose over the nipple and thread the socket to the nipple.
  4. Tighten and proof test to 3000 PSIG.
Hose Assembly Length and Position Angle
  • Measured from end fitting to end fitting, expressed in four digits.
Part Numbering System
  • Based on configuration, material, and assembly length.
Aeroquip PTFE Hose Assemblies
  • Features a polyester chafe guard for abrasion resistance.
Ordering Information
  • Use the numbering system to specify hose assemblies.
Silicone Firesleeve Advantages
Offers benefits such as being asbestos-free and maintaining hose flexibility.
Hose Compatibility
Compatible with various fluids, including fire-resistant hydraulic fluids.
See more

Catalog excerpts

666/667-1

Aeroquip® 1,500 psi PTFE Hose and Assemblies E;T*N Powering Business Worldwide

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666/667-3

Chemical Resistance Eaton's Aeroquip 666/667 medium pressure PTFE hose is used in hydraulic and pneumatic applications at pressures up to 1500 psi (10,342.5 kPa). The hose is unaffected by all fuels, oils, alcohols, coolants, or solvents commonly used in aircraft. In addition, it is inert to acids both concentrated and diluted. Eaton's non-conductive version (AE116) is suitable for oxidizers and propellents used in the missile field. The PTFE liner has sufficient conductivity to prevent electrostatically induced hose failures. The tube is capable of conducting a direct current equal to or greater...

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666/667-4

Compression Crimp Fittings For Use With Aeroquip 666/667 Medium Pressure PTFE Hose Compression crimp fittings are available in both flared and flareless types to mate with (AS4395) and (AS4375) end connections. In addition, elbow fittings are available in standard 45° and 90° styles. Special elbows, crosses, tees, wyes, adapters, bosses, etc. may be made for customer installations. The unique combination of the ramped nipple and the crimping pattern used on the compression crimp fitting results in superior fitting retention under pressure. Burst pressure tests indicate that extreme pressures...

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666/667-5

Sockets must be ordered separately under Eaton's Part Number AE21498 (letter size code same as nipple assembly) Weight Thread T Hex Y lbs/kg .3750-24 .50/12.70 .039/.017 Dimensions: inches/mm Note: Fitting weights include sockets Max. A = maximum length of fitting including socket when fitting is assembled on hose B = dimension used to determine length of hose (hose cut factor) Nom. D = nominal drop dimensions — Tolerance is ± .020"(.508 mm) on forged fittings and ±.035"(1.889 mm) on bent tube fittings. * Jump Size. For use with -4 hose to mate with -3 connector. ** R = radius of elbow measure...

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666/667-6

Sleeve Weight Size Sleeve I.D. Sleeve Gauge (Ibs./kg) Silicone Coated (Fibreglass) Firesleeve -65°F to +450°F (-53°C to +232°C) Heat Shrinkable Polyolefin Abrasion Sleeve -65°F to +275°F (-53°C to +135°C) Abrasion Sleeve made with Teflon™ FEP 100 fluoroplastic resin -65°F to +400°F (-53°C to +204°C) Neoprene Tubing Abrasion Sleeve -65°F to +250°F (-53°C to +121°C) Dimensions: inches/mm NOTE: Use an abrasion sleeve with AE666 PTFE hose in any application where the braid is subject to possible abrasion. Eaton offers two sleeve styles: AE566 hose with integral polyester chafeguard and AE466 hose...

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Hose Assemblies/Swivel Flared to Swivel Flared All hose assemblies shown on this page conform to MS8005. MS style code indicates configuration and material in accordance with MIL-DTL-25579 Dash Size Bent Tube BENT TUBE BENT TUBE BENT TUBE BENT TUBE EATON Aerospace Group

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666/667-8

Globeseal® Flareless Fittings BENT TUBE BENT TUBE 90º Elbow Bent Tube 45º Elbow Bent Tube Nipple Assembly Dimensions: inches/mm Max. A = maximum length of fitting including socket when fitting is assembled on hose B = dimension used to determine length of hose (hose cut factor) Nom. D = nominal drop dimensions — Tolerance is ± .020”(.508mm) on forged fittings and ±.035”(.889 mm) on bent tube fittings. * Jump Size. For use with -4 hose to mate with -3 connector.

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666/667-9

Distance to Sealing Points Socket musts be ordered separately under Eaton’s Part Number AE21498) (letter size code same as nipple assembly K = gauge point location per NAS 1760 Weight lbs/kg STRAIGHT FLARELESS Dash Size Dimensions: inches/mm Note: Fitting weights include sockets *Jump Size. For use with -4 hose to mate with -3 connector. ** R = radius of elbow measure to centerline (bent tube) F = distance across flats (forged) Refer to images on previous page. EATON Aerospa

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666/667-10

Hose Assemblies/Swivel Flareless to Swivel Flareless All hose assemblies shown on this page conform to MS8006. MS style code indicates configuration and material. In accordance with MIL-DTL-25579 Dash Size BENT TUBE EATON Aerospace Group BENT TUBE BENT TUBE BENT TUBE BENT TUBE

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666/667-11

Basic Assembly Numbers The basic part number shown here represents standard configurations with materials, markings, and cleaning requirements confirming to MIL-DTL-25579. If your requirements differ from these standards, the hose assemblies you order will be assigned new number by Eaton. Hose Letter Code Rotational Angle Measurement On assemblies with an elbow fitting on each end, measure the position angle as shown above and suffix the angle to the basic style number. In all cases, the angle should be expressed in 3 digits. For example, 35° should be written as 035. If the angle desired is...

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666/667-12

In Accordance with MIL-DTL-27272 The "super gem"fitting provides permanent protection against leakage, even after high temperature aging and impulsing. The reason for this performance lies in the separation of the sealing function from the retention function. A lip seal is formed by the separation of the PTFE tube in an annular chamber, while positive grip on the wire reinforcement between socket and nipple sleeve provides permanent protection against fitting blow-off. Adjustable Elbows "super gem"adjustable elbow fittings are easily positioned through 360° to the desired relative angle between...

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666/667-13

MS27061 nipple *MS27053 fitting assembly Globeseal Flareless Swivel (mates with AS4375) MS27386 nipple *MS27381 fitting assembly Flared Elbows (adjustable) 45° MS27067 nipple *MS27059 fitting assembly 90° MS27068 nipple *MS27060 fitting assembly *Add — (size) to MS number. If material is to be CRES, add suffix "C" to size. "super gem" Swivel Fittings Fittings in accordance with MIL-DTL-27272 Hose ALUM Series Fitting Nipple Assembly CRES Series Fitting Nipple Assembly EATON Aerospace Group TF100-25E December 2020

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666/667-14

----Weight---- (Ibs./kg) CRES Alum Max. A .047/.021 .024/.010 1.15/29.21 All dimensions in inches/mm. Nom. D = nominal drop dimensions - Tolerance is ± .020’’(.508 mm) on forged fittings and ± .035’’(.889 mm) on bent tube fittings. F = distance across forging flats EATON Aerospace Group TF100-25E December 2020

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All EATON SAS catalogs and technical brochures

  1. AE246

    26  Pages

  2. 601/AE701

    2  Pages

  3. TF100 35D

    60  Pages

  4. AS7510

    2  Pages

*Prices are pre-tax. They exclude delivery charges and customs duties and do not include additional charges for installation or activation options. Prices are indicative only and may vary by country, with changes to the cost of raw materials and exchange rates.