PartsTable
Technical Data Sheet
Download PDF

2A1-03965 — COUPLING,TUBE

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

2A1-03965: COUPLING,TUBE.

The COUPLING,TUBE is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, thread_class: 2B ALL ENDS, connection_type: THREADED INTERNAL TUBE ALL ENDS, connection_style: PLAIN (TUBE) ALL ENDS, special_features: COUNTERBORED BOTH ENDS, style_designator: THREADED INTERNAL. This part is cataloged in the U.S.

Government catalog under NSN 4730-01-366-3721, 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
2A1-03965
NSN: 4730-01-366-3721
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 34712 — LAKE SHORE SYSTEMS, INC. (USA)
SPECIFICATIONS
materialSTEEL OVERALL
thread_class2B ALL ENDS
connection_typeTHREADED INTERNAL TUBE ALL ENDS
connection_stylePLAIN (TUBE) ALL ENDS
special_featuresCOUNTERBORED BOTH ENDS
style_designatorTHREADED INTERNAL
nominal_thickness0.125 INCHES ALL ENDS IN
nominal_thread_size0.437 INCHES ALL ENDS IN
nominal_overall_length1.125 INCHES IN
nominal_outside_diameter0.625 INCHES ALL ENDS IN
thread_series_designatorUNF ALL ENDS
nominal_outside_diameter_tube_accommodated0.250 INCHES ALL ENDS IN
NSN4730-01-366-3721
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 2A1-03965 · 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
•
CONNECTION STYLE: PLAIN (TUBE) ALL ENDS
•
NOMINAL OVERALL LENGTH: 1.125 INCHES IN
•
CONNECTION TYPE: THREADED INTERNAL TUBE ALL ENDS
•
STYLE DESIGNATOR: THREADED INTERNAL
•
NOMINAL OUTSIDE DIAMETER TUBE ACCOMMODATED: 0.250 INCHES ALL ENDS IN
•
NOMINAL THREAD SIZE: 0.437 INCHES ALL ENDS IN
•
NOMINAL OUTSIDE DIAMETER: 0.625 INCHES ALL ENDS IN
TECHNICAL CHARACTERISTICS
CONNECTION STYLEPLAIN (TUBE) ALL ENDS
NOMINAL OVERALL LENGTH1.125 INCHES IN
CONNECTION TYPETHREADED INTERNAL TUBE ALL ENDS
STYLE DESIGNATORTHREADED INTERNAL
NOMINAL OUTSIDE DIAMETER TUBE ACCOMMODATED0.250 INCHES ALL ENDS IN
NOMINAL THREAD SIZE0.437 INCHES ALL ENDS IN
NOMINAL OUTSIDE DIAMETER0.625 INCHES ALL ENDS IN
SPECIAL FEATURESCOUNTERBORED BOTH ENDS
THREAD CLASS2B ALL ENDS
MATERIALSTEEL OVERALL
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
PL5D3-03239 ITEM 44Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
5D3-03239 ITEM 44Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
Ready to buy 2A1-03965?
Compare prices from verified sellers on eBay
Buy on eBay →
As an eBay Partner, PartsTable may earn a commission. Your price is not affected.
FREQUENTLY ASKED QUESTIONS
What is 2A1-03965?
2A1-03965 is a COUPLING,TUBE.
What parts can replace 2A1-03965?
There are 2 known substitutes for 2A1-03965: PL5D3-03239 ITEM 44, 5D3-03239 ITEM 44. Substitute compatibility should be verified for your specific system.
What is the NSN for 2A1-03965?
2A1-03965 is cataloged in the U.S. Government catalog under NSN 4730-01-366-3721. This indicates validated use in U.S. government and defense supply chains.
Community Feedback
Leave a Comment
Comments are reviewed before appearing. You will receive an email to verify before your comment appears.

Request a Quote — 2A1-03965

✓ 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.