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PartsTable / COMPONENT / C2998-2
C2998-2 ✓ 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 flow_angle: 135.0 DEGREES FIRST END, seat_angle: 33.0 DEGREES FIRST END, temp_rating: -65.0 FAHRENHEIT AND 450.0 FAHRENHEIT SINGLE RESPONSE DEGF, thread_class: 3B FIRST END, exterior_color: NATURAL, inside_diameter: 0.680 INCHES NOMINAL IN. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4720-00-043-3727, 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
C2998-2
NSN: 4720-00-043-3727
FSC: 4720
CAGE: 81755 — LOCKHEED MARTIN CORPORATION DIV LOCKHEED MARTIN AERONAUTICS COMPANY (USA)
SPECIFICATIONS
flow_angle135.0 DEGREES FIRST END
seat_angle33.0 DEGREES FIRST END
temp_rating-65.0 FAHRENHEIT AND 450.0 FAHRENHEIT SINGLE RESPONSE DEGF
thread_class3B FIRST END
exterior_colorNATURAL
inside_diameter0.680 INCHES NOMINAL IN
connection_styleSWIVEL NUT FLARE FIRST END
outside_diameter0.750 INCHES NOMINAL IN
special_featuresFLEXIBLE CORRUGATED TUBING 1.75 IN. FROM PLAIN END,1.25 IN. OD,0.75 ID,SPRING RATE 100 LB/IN: DUMP VALVE DRAIN TUBE ASSY LBS
thread_directionRIGHT-HAND FIRST END
operating_pressure100.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM LOCATION NOT OTHERWISE SPECIFIED LBS
burst_test_pressure200.0 POUNDS PER SQUARE INCH LBS
NSN4720-00-043-3727
COMPONENT DIAGRAM
PIPE SECTION — SCHEDULE = WALL THICKNESS WALL: — OD: — LENGTH: — — — PN: C2998-2 · 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
•
EXTERIOR COLOR: NATURAL
•
INNER CONVEYING TUBE STYLE: ANNULAR CLOSE-PITCH CORRUGATED
•
NOMINAL THREAD SIZE: 1.062 INCHES FIRST END IN
•
OPERATING PRESSURE: 100.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM LOCATION NOT OTHERWISE SPECIFIED LBS
•
FLOW ANGLE: 135.0 DEGREES FIRST END
•
THREAD SERIES DESIGNATOR: UNIFIED NATIONAL JOINT (UNJ) FIRST END
•
NOMINAL OUTSIDE DIAMETER TUBE ACCOMMODATED: 0.750 INCHES SECOND END IN
TECHNICAL CHARACTERISTICS (FLIS)
EXTERIOR COLORNATURAL
INNER CONVEYING TUBE STYLEANNULAR CLOSE-PITCH CORRUGATED
NOMINAL THREAD SIZE1.062 INCHES FIRST END IN
OPERATING PRESSURE100.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM LOCATION NOT OTHERWISE SPECIFIED LBS
SPECIAL FEATURESFLEXIBLE CORRUGATED TUBING 1.75 IN. FROM PLAIN END,1.25 IN. OD,0.75 ID,SPRING RATE 100 LB/IN: DUMP VALVE DRAIN TUBE ASSY LBS
FLOW ANGLE135.0 DEGREES FIRST END
THREAD SERIES DESIGNATORUNIFIED NATIONAL JOINT (UNJ) FIRST END
NOMINAL OUTSIDE DIAMETER TUBE ACCOMMODATED0.750 INCHES SECOND END IN
SEAT ANGLE33.0 DEGREES FIRST END
MEASURING METHOD AND LENGTH6.140 INCHES NOMINAL WORKING IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 18
9105Interchangeable
interchangeable cross-reference
interchangeable
2444658Interchangeable
interchangeable cross-reference
interchangeable
4094174Interchangeable
interchangeable cross-reference
interchangeable
40Interchangeable
interchangeable cross-reference
interchangeable
816FInterchangeable
interchangeable cross-reference
interchangeable
16-483Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is C2998-2?
C2998-2 is a HOSE ASSEMBLY,METALLIC.
What parts can replace C2998-2?
There are 18 known substitutes for C2998-2: 9105, 2444658, 4094174 and 15 more. Substitute compatibility should be verified for your specific system.
What is the NSN for C2998-2?
C2998-2 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4720-00-043-3727. 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