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Technical Data Sheet
PartsTable / COMPONENT / MS521304A204R
MS521304A204R ✓ 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 SEMICONDUCTOR DEVICE,DIODE is a the manufacturer industrial component. Key specifications include material: RUBBER ETHYLENE-PROPYLENE CLASS EPM TUBE, temp_rating: -65.0 FAHRENHEIT AND 212.0 FAHRENHEIT SINGLE RESPONSE DEGF, inside_diameter: 0.750 INCHES NOMINAL IN, outside_diameter: 1.062 INCHES NOMINAL IN, burst_test_pressure: 325.0 POUNDS PER SQUARE INCH SINGLE RESPONSE LBS, inside_surface_condition: SMOOTH. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4720-00-846-6558, 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
MS521304A204R
NSN: 4720-00-846-6558
FSC: 4720
CAGE: 96906 — MILITARY STANDARDS PROMULGATED BY MILITARY DEPARTMENTS UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M
SPECIFICATIONS
materialRUBBER ETHYLENE-PROPYLENE CLASS EPM TUBE
temp_rating-65.0 FAHRENHEIT AND 212.0 FAHRENHEIT SINGLE RESPONSE DEGF
inside_diameter0.750 INCHES NOMINAL IN
outside_diameter1.062 INCHES NOMINAL IN
burst_test_pressure325.0 POUNDS PER SQUARE INCH SINGLE RESPONSE LBS
inside_surface_conditionSMOOTH
cross-sectional_shape_styleROUND
nondefinitive_spec/std_data4 TYPE AND A GRADE AND 2 CLASS
specification/standard_data81348-ZZ-H-428 GOVERNMENT SPECIFICATION
layer_composition_and_location1ST LAYER BRAIDED TEXTILE YARN AND OUTER LAYER MOLDED RUBBER, SYNTHETIC
outer_covering_environmental_protectionABRASION RESISTANT AND MILDEW RESISTANT AND OIL RESISTANT AND WATER RESISTANT AND WEATHERPROOF
NSN4720-00-846-6558
COMPONENT DIAGRAM
PIPE SECTION — SCHEDULE = WALL THICKNESS WALL: — OD: — LENGTH: — — — PN: MS521304A204R · 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
•
TEMP RATING: -65.0 FAHRENHEIT AND 212.0 FAHRENHEIT SINGLE RESPONSE DEGF
•
SPECIFICATION/STANDARD DATA: 81348-ZZ-H-428 GOVERNMENT SPECIFICATION
•
NONDEFINITIVE SPEC/STD DATA: 4 TYPE AND A GRADE AND 2 CLASS
•
INSIDE SURFACE CONDITION: SMOOTH
•
OUTSIDE DIAMETER: 1.062 INCHES NOMINAL IN
•
OUTER COVERING ENVIRONMENTAL PROTECTION: ABRASION RESISTANT AND MILDEW RESISTANT AND OIL RESISTANT AND WATER RESISTANT AND WEATHERPROOF
•
CROSS-SECTIONAL SHAPE STYLE: ROUND
•
INSIDE DIAMETER: 0.750 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
TEMP RATING-65.0 FAHRENHEIT AND 212.0 FAHRENHEIT SINGLE RESPONSE DEGF
SPECIFICATION/STANDARD DATA81348-ZZ-H-428 GOVERNMENT SPECIFICATION
NONDEFINITIVE SPEC/STD DATA4 TYPE AND A GRADE AND 2 CLASS
INSIDE SURFACE CONDITIONSMOOTH
OUTSIDE DIAMETER1.062 INCHES NOMINAL IN
OUTER COVERING ENVIRONMENTAL PROTECTIONABRASION RESISTANT AND MILDEW RESISTANT AND OIL RESISTANT AND WATER RESISTANT AND WEATHERPROOF
CROSS-SECTIONAL SHAPE STYLEROUND
INSIDE DIAMETER0.750 INCHES NOMINAL IN
LAYER COMPOSITION AND LOCATION1ST LAYER BRAIDED TEXTILE YARN AND OUTER LAYER MOLDED RUBBER, SYNTHETIC
MATERIALRUBBER ETHYLENE-PROPYLENE CLASS EPM TUBE
VERIFIED SUBSTITUTES & CROSS-REFERENCES 22
4437Interchangeable
interchangeable cross-reference
interchangeable
26-252Interchangeable
interchangeable cross-reference
interchangeable
1N755AInterchangeable
interchangeable cross-reference
interchangeable
05-10007-0AInterchangeable
interchangeable cross-reference
interchangeable
Y138Interchangeable
interchangeable cross-reference
interchangeable
10086300Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is MS521304A204R?
MS521304A204R is a SEMICONDUCTOR DEVICE,DIODE.
What parts can replace MS521304A204R?
There are 22 known substitutes for MS521304A204R: 4437, 26-252, 1N755A and 19 more. Substitute compatibility should be verified for your specific system.
Is MS521304A204R still available?
MS521304A204R is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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Last verified: July 2026