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671914 — TAILPIECE,UNION

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

671914: TAILPIECE,UNION.

The TAILPIECE,UNION is a the manufacturer industrial component. Key specifications include end_item_identification: 6675-01-071-5552. This part is cataloged in the U.S.

Government catalog under NSN 4730-01-138-4479, 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
671914
NSN: 4730-01-138-4479
NIINs: 011384479, 012646216
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 82340 — L3HARRIS TECHNOLOGIES, INC. DIV SPACE AND AIRBORNE SYSTEMS (USA)
SPECIFICATIONS
end_item_identification6675-01-071-5552
NSN4730-01-138-4479
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 671914 · 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
•
FLANGE THICKNESS: 0.313 INCHES NOMINAL IN
•
END CONNECTION TYPE: WELDED
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SEAT TYPE: STRAIGHT FACE
•
TUBING OUTSIDE DIAMETER: 1.250 INCHES NOMINAL IN
•
MATERIAL: STEEL COMP 304
•
FLANGE OUTSIDE DIAMETER: 2.625 INCHES NOMINAL IN
•
WORKING PRESSURE AND SERVICE TYPE: 6000.0 POUNDS PER SQUARE INCH (PSI) NOMINAL OIL AND 6000.0 POUNDS PER SQUARE INCH (PSI) NOMINAL GAS AND 6000.0 POUNDS PER SQUARE INCH (PSI) NOMINAL WATER AND 6000.0 POUNDS PER SQUARE INCH (PSI) NOMINAL AIR LBS
TECHNICAL CHARACTERISTICS
FLANGE THICKNESS0.313 INCHES NOMINAL IN
END CONNECTION TYPEWELDED
OVERALL LENGTH1.375 INCHES NOMINAL IN
SEAT TYPESTRAIGHT FACE
TUBING OUTSIDE DIAMETER1.250 INCHES NOMINAL IN
MATERIALSTEEL COMP 304
FLANGE OUTSIDE DIAMETER2.625 INCHES NOMINAL IN
WORKING PRESSURE AND SERVICE TYPE6000.0 POUNDS PER SQUARE INCH (PSI) NOMINAL OIL AND 6000.0 POUNDS PER SQUARE INCH (PSI) NOMINAL GAS AND 6000.0 POUNDS PER SQUARE INCH (PSI) NOMINAL WATER AND 6000.0 POUNDS PER SQUARE INCH (PSI) NOMINAL AIR LBS
SUBSTITUTES & CROSS-REFERENCES 1
MR51-6-CESame NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 671914?
671914 is a TAILPIECE,UNION.
What parts can replace 671914?
There is 1 known substitute for 671914: MR51-6-CE. Substitute compatibility should be verified for your specific system.
What is the NSN for 671914?
671914 is cataloged in the U.S. Government catalog under NSN 4730-01-138-4479. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.