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4549K551 — NIPPLE,PIPE

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

4549K551: NIPPLE,PIPE.

The NIPPLE,PIPE is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, nominal_length: 1.000 INCHES ALL ENDS IN, nominal_thickness: 1.000 INCHES ALL ENDS IN, end_item_identification: TRAILER ASSY, nominal_outside_diameter: 0.675 INCHES ALL ENDS IN. This part is cataloged in the U.S.

Government catalog under NSN 4730-01-577-7028, 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
4549K551
NSN: 4730-01-577-7028
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 39428 — MCMASTER-CARR SUPPLY CO (USA)
SPECIFICATIONS
materialSTEEL OVERALL
nominal_length1.000 INCHES ALL ENDS IN
nominal_thickness1.000 INCHES ALL ENDS IN
end_item_identificationTRAILER ASSY
nominal_outside_diameter0.675 INCHES ALL ENDS IN
NSN4730-01-577-7028
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 4549K551 · 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
•
NOMINAL LENGTH: 1.000 INCHES ALL ENDS IN
•
NOMINAL OUTSIDE DIAMETER: 0.675 INCHES ALL ENDS IN
•
MATERIAL: STEEL OVERALL
•
NOMINAL THICKNESS: 1.000 INCHES ALL ENDS IN
TECHNICAL CHARACTERISTICS
NOMINAL LENGTH1.000 INCHES ALL ENDS IN
NOMINAL OUTSIDE DIAMETER0.675 INCHES ALL ENDS IN
END ITEM IDENTIFICATIONTRAILER ASSY
MATERIALSTEEL OVERALL
NOMINAL THICKNESS1.000 INCHES ALL ENDS IN
OTHER ITEMS IN FSC 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
4730-00-000-1895 4730-00-000-4289 4730-00-000-4445 4730-00-000-8373 4730-00-000-8897 4730-00-001-0007 4730-00-001-0008
SUBSTITUTES & CROSS-REFERENCES 1
0210525 REV C FIND 119Reference document
Same NSN cross-reference
Reference document — Drawing number reference only
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 4549K551?
4549K551 is a NIPPLE,PIPE.
What parts can replace 4549K551?
There is 1 known substitute for 4549K551: 0210525 REV C FIND 119. Substitute compatibility should be verified for your specific system.
What is the NSN for 4549K551?
4549K551 is cataloged in the U.S. Government catalog under NSN 4730-01-577-7028. 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.