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Technical Data Sheet
PartsTable / COMPONENT / M503A163
M503A163 ✓ 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 TUBING,NONMETALLIC is a the manufacturer industrial component. Key specifications include material: RUBBER SYNTHETIC TUBE, flexibility: FLEXIBLE, temp_rating: -65.0 FAHRENHEIT AND 250.0 FAHRENHEIT SINGLE RESPONSE DEGF, exterior_color: BLACK, inside_diameter: 0.375 INCHES NOMINAL IN, outside_diameter: 0.625 INCHES NOMINAL IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4720-00-695-4819, 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
M503A163
NSN: 4720-00-695-4819
FSC: 4720
CAGE: 91340 — MET-PRO CORPORATION (USA)
SPECIFICATIONS
materialRUBBER SYNTHETIC TUBE
flexibilityFLEXIBLE
temp_rating-65.0 FAHRENHEIT AND 250.0 FAHRENHEIT SINGLE RESPONSE DEGF
exterior_colorBLACK
inside_diameter0.375 INCHES NOMINAL IN
outside_diameter0.625 INCHES NOMINAL IN
inside_surface_conditionSMOOTH
media_for_which_designedFUEL/OIL, HYDROCARBON SINGLE RESPONSE
cross-sectional_shape_styleROUND
measuring_method_and_length1.500 INCHES NOMINAL OVERALL IN
outer_covering_environmental_protectionFUEL RESISTANT AND OIL RESISTANT
NSN4720-00-695-4819
COMPONENT DIAGRAM
PIPE SECTION — SCHEDULE = WALL THICKNESS WALL: — OD: — LENGTH: — — — PN: M503A163 · 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
•
CROSS-SECTIONAL SHAPE STYLE: ROUND
•
INSIDE SURFACE CONDITION: SMOOTH
•
EXTERIOR COLOR: BLACK
•
TEMP RATING: -65.0 FAHRENHEIT AND 250.0 FAHRENHEIT SINGLE RESPONSE DEGF
•
FLEXIBILITY: FLEXIBLE
•
OUTER COVERING ENVIRONMENTAL PROTECTION: FUEL RESISTANT AND OIL RESISTANT
•
MEDIA FOR WHICH DESIGNED: FUEL/OIL, HYDROCARBON SINGLE RESPONSE
•
MEASURING METHOD AND LENGTH: 1.500 INCHES NOMINAL OVERALL IN
TECHNICAL CHARACTERISTICS (FLIS)
CROSS-SECTIONAL SHAPE STYLEROUND
INSIDE SURFACE CONDITIONSMOOTH
EXTERIOR COLORBLACK
TEMP RATING-65.0 FAHRENHEIT AND 250.0 FAHRENHEIT SINGLE RESPONSE DEGF
FLEXIBILITYFLEXIBLE
OUTER COVERING ENVIRONMENTAL PROTECTIONFUEL RESISTANT AND OIL RESISTANT
MEDIA FOR WHICH DESIGNEDFUEL/OIL, HYDROCARBON SINGLE RESPONSE
MEASURING METHOD AND LENGTH1.500 INCHES NOMINAL OVERALL IN
INSIDE DIAMETER0.375 INCHES NOMINAL IN
MATERIALRUBBER SYNTHETIC TUBE
VERIFIED SUBSTITUTES & CROSS-REFERENCES 5
5031-63Interchangeable
interchangeable cross-reference
interchangeable
5031-063Interchangeable
interchangeable cross-reference
interchangeable
MVX1-1GIG0HMInterchangeable
interchangeable cross-reference
interchangeable
68057Interchangeable
interchangeable cross-reference
interchangeable
503A163Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is M503A163?
M503A163 is a TUBING,NONMETALLIC.
What parts can replace M503A163?
There are 5 known substitutes for M503A163: 5031-63, 5031-063, MVX1-1GIG0HM and 2 more. Substitute compatibility should be verified for your specific system.
Is M503A163 still available?
M503A163 is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026