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51B9003-12 — ADAPTER,STRAIGHT,FLANGE TO PIPE

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

51B9003-12: ADAPTER,STRAIGHT,FLANGE TO PIPE.

ADAPTER,STRAIGHT,FLANGE TO PIPE. Key specifications include material: STEEL OVERALL, flange_shape: RECTANGULAR SECOND END, nominal_width: 1.250 INCHES SECOND END IN, nominal_length: 1.250 INCHES SECOND END IN, connection_style: PLAIN (PIPE) FIRST END, nominal_thickness: 0.156 INCHES SECOND END IN. This part is cataloged in the U.S.

Government catalog under NSN 4730-00-097-5232, 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
51B9003-12
NSN: 4730-00-097-5232
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 50948 — PARKER HANNIFIN CORP STRATOFLEX DIV AIRCRAFT FITTINGS OPN (USA)
SPECIFICATIONS
materialSTEEL OVERALL
flange_shapeRECTANGULAR SECOND END
nominal_width1.250 INCHES SECOND END IN
nominal_length1.250 INCHES SECOND END IN
connection_stylePLAIN (PIPE) FIRST END
nominal_thickness0.156 INCHES SECOND END IN
surface_treatmentCADMIUM OVERALL
flange_face_designRAISED STRAIGHT SECOND END
nominal_thread_size0.750 INCHES FIRST END IN
nominal_overall_length1.000 INCHES IN
thread_series_designatorNPT FIRST END
raised_face_nominal_height0.125 INCHES SECOND END IN
NSN4730-00-097-5232
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 51B9003-12 · 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
•
FLANGE SHAPE: RECTANGULAR SECOND END
•
FLANGE FACE DESIGN: RAISED STRAIGHT SECOND END
•
CONNECTION STYLE: PLAIN (PIPE) FIRST END
•
NOMINAL LENGTH: 1.250 INCHES SECOND END IN
•
NOMINAL OVERALL LENGTH: 1.000 INCHES IN
•
NOMINAL THREAD SIZE: 0.750 INCHES FIRST END IN
•
SURFACE TREATMENT: CADMIUM OVERALL
•
NOMINAL WIDTH: 1.250 INCHES SECOND END IN
TECHNICAL CHARACTERISTICS
FLANGE SHAPERECTANGULAR SECOND END
FLANGE FACE DESIGNRAISED STRAIGHT SECOND END
CONNECTION STYLEPLAIN (PIPE) FIRST END
NOMINAL LENGTH1.250 INCHES SECOND END IN
NOMINAL OVERALL LENGTH1.000 INCHES IN
NOMINAL THREAD SIZE0.750 INCHES FIRST END IN
SURFACE TREATMENTCADMIUM OVERALL
NOMINAL WIDTH1.250 INCHES SECOND END IN
MATERIALSTEEL OVERALL
THREAD SERIES DESIGNATORNPT FIRST END
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 51B9003-12?
51B9003-12 is a ADAPTER,STRAIGHT,FLANGE TO PIPE.
What is the NSN for 51B9003-12?
51B9003-12 is cataloged in the U.S. Government catalog under NSN 4730-00-097-5232. 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.