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Technical Data Sheet
PartsTable / COMPONENT / 503B42
503B42 ✓ 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,AIR DUCT is a the manufacturer industrial component. Key specifications include hose_weight: 0.290 OUNCES PER LINEAR FOOT OZ, wall_thickness: 0.017 INCHES NOMINAL IN, connection_type: PLAIN FIRST END, inside_diameter: 2.125 INCHES NOMINAL FIRST END IN, style_designator: HELICALLY WOUND CONTINOUS WIRE SUPPORTED, features_provided: OZONE RESISTANT. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4720-00-709-7314, 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
503B42
NSN: 4720-00-709-7314
FSC: 4720
CAGE: 44940 — CUMMINS POWER GENERATION INC. (USA)
SPECIFICATIONS
hose_weight0.290 OUNCES PER LINEAR FOOT OZ
wall_thickness0.017 INCHES NOMINAL IN
connection_typePLAIN FIRST END
inside_diameter2.125 INCHES NOMINAL FIRST END IN
style_designatorHELICALLY WOUND CONTINOUS WIRE SUPPORTED
features_providedOZONE RESISTANT
cross-sectional_shape_styleROUND
measuring_method_and_length13.000 INCHES NOMINAL OVERALL IN
minimum_inside_bending_radius2.125 INCHES IN
NSN4720-00-709-7314
COMPONENT DIAGRAM
PIPE SECTION — SCHEDULE = WALL THICKNESS WALL: — OD: — LENGTH: — — — PN: 503B42 · 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
•
STYLE DESIGNATOR: HELICALLY WOUND CONTINOUS WIRE SUPPORTED
•
HOSE WEIGHT: 0.290 OUNCES PER LINEAR FOOT OZ
•
MINIMUM INSIDE BENDING RADIUS: 2.125 INCHES IN
•
INSIDE DIAMETER: 2.125 INCHES NOMINAL FIRST END IN
•
WALL THICKNESS: 0.017 INCHES NOMINAL IN
•
MEASURING METHOD AND LENGTH: 13.000 INCHES NOMINAL OVERALL IN
•
FEATURES PROVIDED: OZONE RESISTANT
•
CROSS-SECTIONAL SHAPE STYLE: ROUND
TECHNICAL CHARACTERISTICS (FLIS)
STYLE DESIGNATORHELICALLY WOUND CONTINOUS WIRE SUPPORTED
HOSE WEIGHT0.290 OUNCES PER LINEAR FOOT OZ
MINIMUM INSIDE BENDING RADIUS2.125 INCHES IN
INSIDE DIAMETER2.125 INCHES NOMINAL FIRST END IN
WALL THICKNESS0.017 INCHES NOMINAL IN
MEASURING METHOD AND LENGTH13.000 INCHES NOMINAL OVERALL IN
FEATURES PROVIDEDOZONE RESISTANT
CROSS-SECTIONAL SHAPE STYLEROUND
CONNECTION TYPEPLAIN FIRST END
VERIFIED SUBSTITUTES & CROSS-REFERENCES 8
AMS10134-1203Interchangeable
interchangeable cross-reference
interchangeable
1210321Interchangeable
interchangeable cross-reference
interchangeable
2-1352Interchangeable
interchangeable cross-reference
interchangeable
50342Interchangeable
interchangeable cross-reference
interchangeable
USAF50342Interchangeable
interchangeable cross-reference
interchangeable
3417-2112-1723Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 503B42?
503B42 is a HOSE,AIR DUCT.
What parts can replace 503B42?
There are 8 known substitutes for 503B42: AMS10134-1203, 1210321, 2-1352 and 5 more. Substitute compatibility should be verified for your specific system.
Is 503B42 still available?
503B42 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