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Technical Data Sheet
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503A3 ✓ 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 JACKSCREW,ELECTRICAL CONNECTOR is a the manufacturer industrial component. Key specifications include material: RUBBER ETHYLENE-PROPYLENE CLASS EPM TUBE, temp_rating: -40.0 FAHRENHEIT AND 212.0 FAHRENHEIT SINGLE RESPONSE DEGF, inside_diameter: 1.500 INCHES NOMINAL IN, outside_diameter: 2.062 INCHES NOMINAL IN, burst_test_pressure: 200.0 POUNDS PER SQUARE INCH SINGLE RESPONSE LBS, inside_surface_condition: SMOOTH. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4720-00-640-5439, 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
503A3
NSN: 4720-00-640-5439
FSC: 4720
CAGE: 44940 — CUMMINS POWER GENERATION INC. (USA)
SPECIFICATIONS
materialRUBBER ETHYLENE-PROPYLENE CLASS EPM TUBE
temp_rating-40.0 FAHRENHEIT AND 212.0 FAHRENHEIT SINGLE RESPONSE DEGF
inside_diameter1.500 INCHES NOMINAL IN
outside_diameter2.062 INCHES NOMINAL IN
burst_test_pressure200.0 POUNDS PER SQUARE INCH SINGLE RESPONSE LBS
inside_surface_conditionSMOOTH
cross-sectional_shape_styleROUND
specification/standard_data81343 SAE J20-1 GOVERNMENT SPECIFICATION
layer_composition_and_location1ST LAYER BRAIDED TEXTILE YARN AND OUTER LAYER MOLDED RUBBER, SYNTHETIC
outer_covering_environmental_protectionHEAT RESISTANT AND OIL RESISTANT AND OZONE RESISTANT AND MILDEW RESISTANT
NSN4720-00-640-5439
COMPONENT DIAGRAM
PIPE SECTION — SCHEDULE = WALL THICKNESS WALL: — OD: — LENGTH: — — — PN: 503A3 · 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
•
BURST TEST PRESSURE: 200.0 POUNDS PER SQUARE INCH SINGLE RESPONSE LBS
•
SPECIFICATION/STANDARD DATA: 81343 SAE J20-1 GOVERNMENT SPECIFICATION
•
TEMP RATING: -40.0 FAHRENHEIT AND 212.0 FAHRENHEIT SINGLE RESPONSE DEGF
•
OUTER COVERING ENVIRONMENTAL PROTECTION: HEAT RESISTANT AND OIL RESISTANT AND OZONE RESISTANT AND MILDEW RESISTANT
•
MATERIAL: RUBBER ETHYLENE-PROPYLENE CLASS EPM TUBE
•
INSIDE SURFACE CONDITION: SMOOTH
•
INSIDE DIAMETER: 1.500 INCHES NOMINAL IN
•
LAYER COMPOSITION AND LOCATION: 1ST LAYER BRAIDED TEXTILE YARN AND OUTER LAYER MOLDED RUBBER, SYNTHETIC
TECHNICAL CHARACTERISTICS (FLIS)
BURST TEST PRESSURE200.0 POUNDS PER SQUARE INCH SINGLE RESPONSE LBS
SPECIFICATION/STANDARD DATA81343 SAE J20-1 GOVERNMENT SPECIFICATION
TEMP RATING-40.0 FAHRENHEIT AND 212.0 FAHRENHEIT SINGLE RESPONSE DEGF
OUTER COVERING ENVIRONMENTAL PROTECTIONHEAT RESISTANT AND OIL RESISTANT AND OZONE RESISTANT AND MILDEW RESISTANT
MATERIALRUBBER ETHYLENE-PROPYLENE CLASS EPM TUBE
INSIDE SURFACE CONDITIONSMOOTH
INSIDE DIAMETER1.500 INCHES NOMINAL IN
LAYER COMPOSITION AND LOCATION1ST LAYER BRAIDED TEXTILE YARN AND OUTER LAYER MOLDED RUBBER, SYNTHETIC
CROSS-SECTIONAL SHAPE STYLEROUND
OUTSIDE DIAMETER2.062 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 24
7044Interchangeable
interchangeable cross-reference
interchangeable
114454-1Interchangeable
interchangeable cross-reference
interchangeable
0594670Interchangeable
interchangeable cross-reference
interchangeable
CL7044Interchangeable
interchangeable cross-reference
interchangeable
UCL7044Interchangeable
interchangeable cross-reference
interchangeable
WI7044Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 503A3?
503A3 is a JACKSCREW,ELECTRICAL CONNECTOR.
What parts can replace 503A3?
There are 24 known substitutes for 503A3: 7044, 114454-1, 0594670 and 21 more. Substitute compatibility should be verified for your specific system.
Is 503A3 still available?
503A3 is currently cancelled.
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Last verified: July 2026