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Technical Data Sheet
PartsTable / COMPONENT / MIL-H-17666
MIL-H-17666 ✓ Verified by PartsTable
— · PIPE SECTION
WHAT YOU NEED TO KNOW
Schedule = wall thickness, NOT diameter Nominal pipe size != actual OD
Sch 40 and Sch 80 same OD, different wall
PRODUCT OVERVIEW

The HOSE ASSEMBLY,METALLIC is a the manufacturer industrial component. Key specifications include exterior_color: NATURAL, connection_type: THREADED EXTERNAL PIPE FIRST END, inside_diameter: 0.375 INCHES NOMINAL IN, connection_style: PLAIN FIRST END, outside_diameter: 0.662 INCHES NOMINAL IN, thread_direction: RIGHT-HAND FIRST END. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4720-00-289-4615, indicating validated use in U.S. government and defense logistics supply chains. Available through authorized enterprise resellers and TPM (Third Party Maintenance) channels.

Verify compatibility with your specific system configuration before ordering.

WHERE IT FITS
MIL-H-17666
NSN: 4720-00-289-4615
FSC: 4720
CAGE: 81349 — MILITARY SPECIFICATIONS PROMULGATED BY MILITARY DEPARTMENTS/AGENCIES UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M
SPECIFICATIONS
exterior_colorNATURAL
connection_typeTHREADED EXTERNAL PIPE FIRST END
inside_diameter0.375 INCHES NOMINAL IN
connection_stylePLAIN FIRST END
outside_diameter0.662 INCHES NOMINAL IN
thread_directionRIGHT-HAND FIRST END
features_providedIDENTICAL ENDS
burst_test_pressure12000.0 POUNDS PER SQUARE INCH LBS
nominal_thread_size0.375 INCHES FIRST END IN
end_connection_designSTRAIGHT FIRST END
thread_series_designatorNPT FIRST END
hydrostatic_test_pressure6000.0 POUNDS PER SQUARE INCH LBS
NSN4720-00-289-4615
COMPONENT DIAGRAM
PIPE SECTION — SCHEDULE = WALL THICKNESS WALL: — OD: — LENGTH: — — — PN: MIL-H-17666 · OEM ⚠ VERIFY BEFORE ORDERING Schedule = wall thickness, NOT pipe diameter. Sch 40 and Sch 80 have the same OD but different wall thickness. Nominal pipe size ≠ actual OD — a 1" pipe is actually 1.315" OD ✓ BROKER TIP Sch 40 = standard wall, Sch 80 = heavy wall (higher pressure), Sch 160 = extra heavy. Seamless pipe is required for high-pressure applications — welded pipe has lower ratings PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
CONNECTION TYPE: THREADED EXTERNAL PIPE FIRST END
•
INNER CONVEYING TUBE STYLE: ANNULAR CLOSE-PITCH CORRUGATED OR HELICAL CLOSE-PITCH CORRUGATED
•
INSIDE DIAMETER: 0.375 INCHES NOMINAL IN
•
BURST TEST PRESSURE: 12000.0 POUNDS PER SQUARE INCH LBS
•
THREAD DIRECTION: RIGHT-HAND FIRST END
•
OUTSIDE DIAMETER: 0.662 INCHES NOMINAL IN
•
CROSS-SECTIONAL SHAPE STYLE: ROUND
•
SPECIFICATION/STANDARD DATA: 81349-MIL-H-17666 GOVERNMENT SPECIFICATION
TECHNICAL CHARACTERISTICS (FLIS)
CONNECTION TYPETHREADED EXTERNAL PIPE FIRST END
INNER CONVEYING TUBE STYLEANNULAR CLOSE-PITCH CORRUGATED OR HELICAL CLOSE-PITCH CORRUGATED
INSIDE DIAMETER0.375 INCHES NOMINAL IN
BURST TEST PRESSURE12000.0 POUNDS PER SQUARE INCH LBS
THREAD DIRECTIONRIGHT-HAND FIRST END
OUTSIDE DIAMETER0.662 INCHES NOMINAL IN
CROSS-SECTIONAL SHAPE STYLEROUND
SPECIFICATION/STANDARD DATA81349-MIL-H-17666 GOVERNMENT SPECIFICATION
HYDROSTATIC TEST PRESSURE6000.0 POUNDS PER SQUARE INCH LBS
EXTERIOR COLORNATURAL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 11
717105Interchangeable
interchangeable cross-reference
interchangeable
100056Interchangeable
interchangeable cross-reference
interchangeable
N765422Interchangeable
interchangeable cross-reference
interchangeable
RR-S-714Interchangeable
interchangeable cross-reference
interchangeable
MN123Interchangeable
interchangeable cross-reference
interchangeable
G11P12906Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is MIL-H-17666?
MIL-H-17666 is a HOSE ASSEMBLY,METALLIC.
What parts can replace MIL-H-17666?
There are 11 known substitutes for MIL-H-17666: 717105, 100056, N765422 and 8 more. Substitute compatibility should be verified for your specific system.
What is the NSN for MIL-H-17666?
MIL-H-17666 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4720-00-289-4615. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026