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FN04-73 — SLEEVE,COMPRESSION,TUBE-HOSE FIT

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

FN04-73: SLEEVE,COMPRESSION,TUBE-HOSE FIT.

SLEEVE,COMPRESSION,TUBE-HOSE FIT. Key specifications include material: COPPER ALLOY, taper_length: 0.112 INCHES NOMINAL IN, overall_length: 0.222 INCHES NOMINAL IN, style_designator: TAPERED, casehardening_indicator: NOT CASEHARDENED, sleeve_outside_diameter: 0.540 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 4730-00-075-0033, 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
FN04-73
NSN: 4730-00-075-0033
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 30327 — IMPERIAL (USA)
SPECIFICATIONS
materialCOPPER ALLOY
taper_length0.112 INCHES NOMINAL IN
overall_length0.222 INCHES NOMINAL IN
style_designatorTAPERED
casehardening_indicatorNOT CASEHARDENED
sleeve_outside_diameter0.540 INCHES NOMINAL IN
hose/tube_outside_diameter_for_which_designed0.250 INCHES NOMINAL IN
NSN4730-00-075-0033
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: FN04-73 · 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
•
STYLE DESIGNATOR: TAPERED
•
SLEEVE OUTSIDE DIAMETER: 0.540 INCHES NOMINAL IN
•
TAPER LENGTH: 0.112 INCHES NOMINAL IN
•
CASEHARDENING INDICATOR: NOT CASEHARDENED
•
MATERIAL: COPPER ALLOY
•
HOSE/TUBE OUTSIDE DIAMETER FOR WHICH DESIGNED: 0.250 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
STYLE DESIGNATORTAPERED
OVERALL LENGTH0.222 INCHES NOMINAL IN
SLEEVE OUTSIDE DIAMETER0.540 INCHES NOMINAL IN
TAPER LENGTH0.112 INCHES NOMINAL IN
CASEHARDENING INDICATORNOT CASEHARDENED
MATERIALCOPPER ALLOY
HOSE/TUBE OUTSIDE DIAMETER FOR WHICH DESIGNED0.250 INCHES NOMINAL IN
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 1
9995436-2Same 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
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FREQUENTLY ASKED QUESTIONS
What is FN04-73?
FN04-73 is a SLEEVE,COMPRESSION,TUBE-HOSE FIT.
What parts can replace FN04-73?
There is 1 known substitute for FN04-73: 9995436-2. Substitute compatibility should be verified for your specific system.
What is the NSN for FN04-73?
FN04-73 is cataloged in the U.S. Government catalog under NSN 4730-00-075-0033. 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.