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2062181PK — UNION,TUBE

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

2062181PK: UNION,TUBE.

The UNION,TUBE is a the manufacturer industrial component. Key specifications include material: STEEL CORROSION RESISTING OVERALL, seat_angle: 12.0 DEGREES ALL ENDS, thread_class: 3A ALL ENDS A, connection_style: FLARELESS (TUBE) ALL ENDS, special_features: TUBE UNION, style_designator: INVERTED FLARE W/ CENTER WRENCHING FACILITY. This part is cataloged in the U.S.

Government catalog under NSN 4730-00-061-0412, 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
2062181PK
NSN: 4730-00-061-0412
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 90099 — NORTHROP GRUMMAN SYSTEMS CORPORATION DIV MARINE SYSTEMS (USA)
SPECIFICATIONS
materialSTEEL CORROSION RESISTING OVERALL
seat_angle12.0 DEGREES ALL ENDS
thread_class3A ALL ENDS A
connection_styleFLARELESS (TUBE) ALL ENDS
special_featuresTUBE UNION
style_designatorINVERTED FLARE W/ CENTER WRENCHING FACILITY
surface_treatmentPASSIVATE OVERALL
nominal_thread_size0.438 INCHES ALL ENDS IN
nominal_overall_length1.031 INCHES IN
thread_series_designatorUNF ALL ENDS
furnished_items_and_quantity2 SHORT COUPLING NUT AND 4 FERRULE SLEEVE
nominal_outside_diameter_tube_accommodated0.250 INCHES ALL ENDS IN
NSN4730-00-061-0412
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 2062181PK · 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: 2 SHORT COUPLING NUT AND 4 FERRULE SLEEVE
•
CONNECTION STYLE: FLARELESS (TUBE) ALL ENDS
•
NOMINAL OVERALL LENGTH: 1.031 INCHES IN
•
STYLE DESIGNATOR: INVERTED FLARE W/ CENTER WRENCHING FACILITY
•
NOMINAL OUTSIDE DIAMETER TUBE ACCOMMODATED: 0.250 INCHES ALL ENDS IN
•
NOMINAL THREAD SIZE: 0.438 INCHES ALL ENDS IN
•
SEAT ANGLE: 12.0 DEGREES ALL ENDS
TECHNICAL CHARACTERISTICS
FURNISHED ITEMS AND QUANTITY2 SHORT COUPLING NUT AND 4 FERRULE SLEEVE
CONNECTION STYLEFLARELESS (TUBE) ALL ENDS
NOMINAL OVERALL LENGTH1.031 INCHES IN
STYLE DESIGNATORINVERTED FLARE W/ CENTER WRENCHING FACILITY
NOMINAL OUTSIDE DIAMETER TUBE ACCOMMODATED0.250 INCHES ALL ENDS IN
NOMINAL THREAD SIZE0.438 INCHES ALL ENDS IN
SEAT ANGLE12.0 DEGREES ALL ENDS
SPECIAL FEATURESTUBE UNION
SURFACE TREATMENTPASSIVATE OVERALL
THREAD CLASS3A ALL ENDS A
SUBSTITUTES & CROSS-REFERENCES 7
4-4HBX-SSReference document
Same NSN cross-reference
Reference document — Secondary reference
AI4U-SSReference document
Same NSN cross-reference
Reference document — Secondary reference
4U316Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
TF190-1090Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
2062181PK-001Reference document
Same NSN cross-reference
Reference document — Secondary reference
45WM563Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 2062181PK?
2062181PK is a UNION,TUBE.
What parts can replace 2062181PK?
There are 7 known substitutes for 2062181PK: 4-4HBX-SS, AI4U-SS, 4U316 and 4 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 2062181PK?
2062181PK is cataloged in the U.S. Government catalog under NSN 4730-00-061-0412. 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.