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16H1603-3 — FITTING ASSEMBLY

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

16H1603-3: FITTING ASSEMBLY.

The FITTING ASSEMBLY is a the manufacturer industrial component. This part is cataloged in the U.S. Government catalog under NSN 4730-01-043-9740, 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
16H1603-3
NSN: 4730-01-043-9740
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 81755 — LOCKHEED MARTIN CORPORATION DIV LOCKHEED MARTIN AERONAUTICS COMPANY (USA)
SPECIFICATIONS
Part Number16H1603-3
NSN4730-01-043-9740
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 16H1603-3 · 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
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GENERAL CHARACTERISTICS ITEM DESCRIPTION: ALUMINUM ALLOY,QQ-A-225/8-T651,1.850 IN.MIN,1.910 IN.MAX O/A LG,0.120 IN.MIN,0.140 IN.MAX FLANGE THK,1.640 IN.MIN,1.660 IN.MAX FIRST END TO FLANGE LG,0.100 IN. SECOND END TO FLANGE LG,1.890 IN.MIN,1.950 IN.MAX FLANGE DIA,0.371 IN.MIN,0.379 IN.MAX FIRST END DIA,0.740 IN.MIN,0.760 IN.MAX SECOND END DIA,0.190 IN.MIN,0.210 IN.MAX HOLE DIA,125.0 UIN FIN IN
TECHNICAL CHARACTERISTICS
GENERAL CHARACTERISTICS ITEM DESCRIPTIONALUMINUM ALLOY,QQ-A-225/8-T651,1.850 IN.MIN,1.910 IN.MAX O/A LG,0.120 IN.MIN,0.140 IN.MAX FLANGE THK,1.640 IN.MIN,1.660 IN.MAX FIRST END TO FLANGE LG,0.100 IN. SECOND END TO FLANGE LG,1.890 IN.MIN,1.950 IN.MAX FLANGE DIA,0.371 IN.MIN,0.379 IN.MAX FIRST END DIA,0.740 IN.MIN,0.760 IN.MAX SECOND END DIA,0.190 IN.MIN,0.210 IN.MAX HOLE DIA,125.0 UIN FIN 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 2
16H1603-3ASame NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
4730PL0742846Reference document
Same NSN cross-reference
Reference document — Informative reference only
LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 16H1603-3?
16H1603-3 is a FITTING ASSEMBLY.
What parts can replace 16H1603-3?
There are 2 known substitutes for 16H1603-3: 16H1603-3A, 4730PL0742846. Substitute compatibility should be verified for your specific system.
What is the NSN for 16H1603-3?
16H1603-3 is cataloged in the U.S. Government catalog under NSN 4730-01-043-9740. 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.