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7551K127 — FLANGE,PIPE

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

7551K127: FLANGE,PIPE.

The FLANGE,PIPE is a the manufacturer industrial component. Key specifications include material: STEEL, thickness: 0.938 INCHES NOMINAL IN, flange_diameter: 7.500 INCHES NOMINAL IN, special_features: USED WITH WATER, OIL NATURAL GAS AND STEAM; MAXIMUM PRESSURE AND TEMPERATURE FOR STEAM IS 150 PSI @ 350 DEG F DEGF, bolt_circle_diameter: 6.000 INCHES NOMINAL IN, operating_pressure_and_type: 150.0 POUNDS PER SQUARE INCH (PSI) AIR MAXIMUM REQUIRED LOCATION NOT OTHERWISE SPECIFIED LBS. This part is cataloged in the U.S.

Government catalog under NSN 4730-01-554-2664, 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
7551K127
NSN: 4730-01-554-2664
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 39428 — MCMASTER-CARR SUPPLY CO (USA)
SPECIFICATIONS
materialSTEEL
thickness0.938 INCHES NOMINAL IN
flange_diameter7.500 INCHES NOMINAL IN
special_featuresUSED WITH WATER, OIL NATURAL GAS AND STEAM; MAXIMUM PRESSURE AND TEMPERATURE FOR STEAM IS 150 PSI @ 350 DEG F DEGF
bolt_hole_quantity4
bolt_circle_diameter6.000 INCHES NOMINAL IN
operating_pressure_and_type150.0 POUNDS PER SQUARE INCH (PSI) AIR MAXIMUM REQUIRED LOCATION NOT OTHERWISE SPECIFIED LBS
nominal_pipe_size_for_which_designed3.000 INCHES IN
maximum_operating_temp_and_media_for_which_designed72.0 FAHRENHEIT AIR DEGF
NSN4730-01-554-2664
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 7551K127 · 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 DIAMETER: 7.500 INCHES NOMINAL IN
•
NOMINAL PIPE SIZE FOR WHICH DESIGNED: 3.000 INCHES IN
•
MAXIMUM OPERATING TEMP AND MEDIA FOR WHICH DESIGNED: 72.0 FAHRENHEIT AIR DEGF
•
OPERATING PRESSURE AND TYPE: 150.0 POUNDS PER SQUARE INCH (PSI) AIR MAXIMUM REQUIRED LOCATION NOT OTHERWISE SPECIFIED LBS
•
BOLT HOLE QUANTITY: 4
•
BOLT CIRCLE DIAMETER: 6.000 INCHES NOMINAL IN
•
MATERIAL: STEEL
TECHNICAL CHARACTERISTICS
FLANGE DIAMETER7.500 INCHES NOMINAL IN
NOMINAL PIPE SIZE FOR WHICH DESIGNED3.000 INCHES IN
MAXIMUM OPERATING TEMP AND MEDIA FOR WHICH DESIGNED72.0 FAHRENHEIT AIR DEGF
OPERATING PRESSURE AND TYPE150.0 POUNDS PER SQUARE INCH (PSI) AIR MAXIMUM REQUIRED LOCATION NOT OTHERWISE SPECIFIED LBS
BOLT HOLE QUANTITY4
BOLT CIRCLE DIAMETER6.000 INCHES NOMINAL IN
SPECIAL FEATURESUSED WITH WATER, OIL NATURAL GAS AND STEAM; MAXIMUM PRESSURE AND TEMPERATURE FOR STEAM IS 150 PSI @ 350 DEG F DEGF
MATERIALSTEEL
THICKNESS0.938 INCHES NOMINAL 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

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 7551K127?
7551K127 is a FLANGE,PIPE.
What is the NSN for 7551K127?
7551K127 is cataloged in the U.S. Government catalog under NSN 4730-01-554-2664. 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.