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TJ59-12-12 — ADAPTER,STRAIGHT,TUBE TO BOSS

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

TJ59-12-12: ADAPTER,STRAIGHT,TUBE TO BOSS.

The ADAPTER,STRAIGHT,TUBE TO BOSS is a the manufacturer industrial component. Key specifications include material: STEEL COMP 316 OVERALL, thread_class: 3A ALL ENDS A, connection_type: THREADED EXTERNAL BOSS SECOND END, connection_style: EXTERNAL SEAT FOR GASKET SEAL (BOSS) SECOND END, surface_treatment: PASSIVATE OVERALL, operating_pressure: 3000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS. This part is cataloged in the U.S.

Government catalog under NSN 4730-01-150-4891, 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
TJ59-12-12
NSN: 4730-01-150-4891
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 0JC12 — BEC SYSTEMS LLC DBA BEC MACHINE PRODUCTS (USA)
SPECIFICATIONS
materialSTEEL COMP 316 OVERALL
thread_class3A ALL ENDS A
connection_typeTHREADED EXTERNAL BOSS SECOND END
connection_styleEXTERNAL SEAT FOR GASKET SEAL (BOSS) SECOND END
surface_treatmentPASSIVATE OVERALL
operating_pressure3000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
nominal_thread_size1.062 INCHES ALL ENDS IN
maximum_operating_temp225.0 FAHRENHEIT SINGLE RESPONSE DEGF
nominal_overall_length2.312 INCHES IN
thread_series_designatorUNF ALL ENDS
furnished_items_and_quantity1 TUBE COUPLING NUT AND 1 PREFORMED PACKING
nominal_outside_diameter_tube_accommodated0.750 INCHES FIRST END IN
NSN4730-01-150-4891
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: TJ59-12-12 · 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
•
FURNISHED ITEMS AND QUANTITY: 1 TUBE COUPLING NUT AND 1 PREFORMED PACKING
•
CONNECTION STYLE: EXTERNAL SEAT FOR GASKET SEAL (BOSS) SECOND END
•
NOMINAL OVERALL LENGTH: 2.312 INCHES IN
•
CONNECTION TYPE: THREADED EXTERNAL TUBE FIRST END
•
NOMINAL OUTSIDE DIAMETER TUBE ACCOMMODATED: 0.750 INCHES FIRST END IN
•
OPERATING PRESSURE: 3000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
TECHNICAL CHARACTERISTICS
FURNISHED ITEMS AND QUANTITY1 TUBE COUPLING NUT AND 1 PREFORMED PACKING
CONNECTION STYLEEXTERNAL SEAT FOR GASKET SEAL (BOSS) SECOND END
CONNECTION STYLEGASKET SEAL (TUBE) FIRST END
NOMINAL OVERALL LENGTH2.312 INCHES IN
CONNECTION TYPETHREADED EXTERNAL TUBE FIRST END
CONNECTION TYPETHREADED EXTERNAL BOSS SECOND END
NOMINAL OUTSIDE DIAMETER TUBE ACCOMMODATED0.750 INCHES FIRST END IN
OPERATING PRESSURE3000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
NOMINAL THREAD SIZE1.062 INCHES ALL ENDS IN
MAXIMUM OPERATING TEMP225.0 FAHRENHEIT SINGLE RESPONSE DEGF
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 2
0451C0029-5Reference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
A518235-17SSReference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is TJ59-12-12?
TJ59-12-12 is a ADAPTER,STRAIGHT,TUBE TO BOSS.
What parts can replace TJ59-12-12?
There are 2 known substitutes for TJ59-12-12: 0451C0029-5, A518235-17SS. Substitute compatibility should be verified for your specific system.
What is the NSN for TJ59-12-12?
TJ59-12-12 is cataloged in the U.S. Government catalog under NSN 4730-01-150-4891. 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.