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501259A ✓ 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 NIPPLE,TUBE is a the manufacturer industrial component. Key specifications include material: STEEL COMP 304 OVERALL, seat_angle: 37.0 DEGREES FIRST END, thread_class: 3A ALL ENDS A, connection_style: INVERTED FLARE (TUBE) FIRST END, style_designator: CENTER WRENCHING FACILITY, surface_treatment: PASSIVATE OVERALL. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-014-2763, 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
501259A
NSN: 4730-00-014-2763
FSC: 4730
CAGE: 56232 — LOCKHEED MARTIN CORPORATION DIV RMS - MITCHEL FIELD (USA)
SPECIFICATIONS
materialSTEEL COMP 304 OVERALL
seat_angle37.0 DEGREES FIRST END
thread_class3A ALL ENDS A
connection_styleINVERTED FLARE (TUBE) FIRST END
style_designatorCENTER WRENCHING FACILITY
surface_treatmentPASSIVATE OVERALL
nominal_thread_size1.312 INCHES ALL ENDS IN
nominal_overall_length1.877 INCHES IN
thread_quantity_per_inch12 ALL ENDS
thread_series_designatorUNIFIED NATIONAL JOINT (UNJ) ALL ENDS
nominal_outside_diameter_tube_accommodated1.000 INCHES ALL ENDS IN
NSN4730-00-014-2763
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 501259A · 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 OUTSIDE DIAMETER TUBE ACCOMMODATED: 1.000 INCHES ALL ENDS IN
•
MATERIAL: STEEL COMP 304 OVERALL
•
NOMINAL OVERALL LENGTH: 1.877 INCHES IN
•
STYLE DESIGNATOR: CENTER WRENCHING FACILITY
•
NOMINAL THREAD SIZE: 1.312 INCHES ALL ENDS IN
•
THREAD SERIES DESIGNATOR: UNIFIED NATIONAL JOINT (UNJ) ALL ENDS
•
SURFACE TREATMENT: PASSIVATE OVERALL
•
THREAD QUANTITY PER INCH: 12 ALL ENDS
TECHNICAL CHARACTERISTICS (FLIS)
NOMINAL OUTSIDE DIAMETER TUBE ACCOMMODATED1.000 INCHES ALL ENDS IN
MATERIALSTEEL COMP 304 OVERALL
NOMINAL OVERALL LENGTH1.877 INCHES IN
STYLE DESIGNATORCENTER WRENCHING FACILITY
NOMINAL THREAD SIZE1.312 INCHES ALL ENDS IN
THREAD SERIES DESIGNATORUNIFIED NATIONAL JOINT (UNJ) ALL ENDS
SURFACE TREATMENTPASSIVATE OVERALL
THREAD QUANTITY PER INCH12 ALL ENDS
SEAT ANGLE37.0 DEGREES FIRST END
CONNECTION STYLEFLARED (TUBE) SECOND END
VERIFIED SUBSTITUTES & CROSS-REFERENCES 8
501259Interchangeable
interchangeable cross-reference
interchangeable
3100-62CBInterchangeable
interchangeable cross-reference
interchangeable
490869Interchangeable
interchangeable cross-reference
interchangeable
5100-62-S-MDInterchangeable
interchangeable cross-reference
interchangeable
501-658Interchangeable
interchangeable cross-reference
interchangeable
1223255Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 501259A?
501259A is a NIPPLE,TUBE.
What parts can replace 501259A?
There are 8 known substitutes for 501259A: 501259, 3100-62CB, 490869 and 5 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 501259A?
501259A is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-014-2763. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026