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PartsTable / COMPONENT / C-58578-12
C-58578-12 ✓ Verified by PartsTable
— · HOSE FITTING
WHAT YOU NEED TO KNOW
PTFE tape on tapered threads (NPT/BSPT) JIC/AN flare connections seal metal-to-metal — no tape
NPT != BSPT — look identical, NOT interchangeable
PRODUCT OVERVIEW

The TAILPIECE,UNION is a the manufacturer industrial component. Key specifications include material: STEEL COMP 304, seat_type: GASKET, overall_length: 1.125 INCHES NOMINAL IN, end_connection_type: WELDED, union_outside_diameter: 1.875 INCHES NOMINAL IN, nominal_pipe_size_designation: 0.750 INCHES 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 4730-01-283-0353, 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
C-58578-12
NSN: 4730-01-283-0353
FSC: 4730
CAGE: 77842 — EATON CORPORATION DBA EATON INOAC DIV EATON (USA)
SPECIFICATIONS
materialSTEEL COMP 304
seat_typeGASKET
overall_length1.125 INCHES NOMINAL IN
end_connection_typeWELDED
union_outside_diameter1.875 INCHES NOMINAL IN
nominal_pipe_size_designation0.750 INCHES IN
NSN4730-01-283-0353
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: C-58578-12 · OEM ⚠ VERIFY BEFORE ORDERING NPT ≠ BSPT — tapered threads look identical but are NOT interchangeable. Wrong thread = leak. JIC (37°) ≠ AN (37°) ≠ SAE 45° — flare angles must match exactly. Measure thread pitch with gauge — visual identification is unreliable ✓ BROKER TIP Always use thread sealant (PTFE tape or pipe compound) on tapered threads (NPT/BSPT). JIC/AN flare fittings seal metal-to-metal — never use tape on flare connections PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
END CONNECTION TYPE: WELDED
•
SEAT TYPE: GASKET
•
MATERIAL: STEEL COMP 304
•
UNION OUTSIDE DIAMETER: 1.875 INCHES NOMINAL IN
•
NOMINAL PIPE SIZE DESIGNATION: 0.750 INCHES IN
TECHNICAL CHARACTERISTICS (FLIS)
END CONNECTION TYPEWELDED
SEAT TYPEGASKET
OVERALL LENGTH1.125 INCHES NOMINAL IN
MATERIALSTEEL COMP 304
UNION OUTSIDE DIAMETER1.875 INCHES NOMINAL IN
NOMINAL PIPE SIZE DESIGNATION0.750 INCHES IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 9
32448Interchangeable
interchangeable cross-reference
interchangeable
58578Interchangeable
interchangeable cross-reference
interchangeable
58242Interchangeable
interchangeable cross-reference
interchangeable
XE1819-30-3Interchangeable
interchangeable cross-reference
interchangeable
C1 5Y(E)AWG18/19OGInterchangeable
interchangeable cross-reference
interchangeable
M16878/4BHE3Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is C-58578-12?
C-58578-12 is a TAILPIECE,UNION.
What parts can replace C-58578-12?
There are 9 known substitutes for C-58578-12: 32448, 58578, 58242 and 6 more. Substitute compatibility should be verified for your specific system.
What is the NSN for C-58578-12?
C-58578-12 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-01-283-0353. This indicates validated use in U.S. government and defense supply chains.
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PartsTable Design LLC · partstable.com
Last verified: July 2026