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803-7657203ITEM77 — THREAD PIECE,UNION

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

803-7657203ITEM77: THREAD PIECE,UNION.

The THREAD PIECE,UNION is a the manufacturer industrial component. Key specifications include material: COPPER ALLOY, overall_length: 1.0 INCHES NOMINAL IN, special_features: MATERIAL CU NI 70/30 PER MIL-C-24679, screw_thread_location: EXTERNAL, nominal_pipe_size_designation: 1.0 INCHES IN, screw_thread_series_designator: UNS. This part is cataloged in the U.S.

Government catalog under NSN 4730-01-598-9607, 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
803-7657203ITEM77
NSN: 4730-01-598-9607
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 53711 — NAVAL SEA SYSTEMS COMMAND (USA)
SPECIFICATIONS
materialCOPPER ALLOY
overall_length1.0 INCHES NOMINAL IN
special_featuresMATERIAL CU NI 70/30 PER MIL-C-24679
screw_thread_locationEXTERNAL
nominal_pipe_size_designation1.0 INCHES IN
screw_thread_series_designatorUNS
NSN4730-01-598-9607
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 803-7657203ITEM77 · 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
•
NOMINAL PIPE SIZE DESIGNATION: 1.0 INCHES IN
•
SCREW THREAD SERIES DESIGNATOR: UNS
•
SCREW THREAD LOCATION: EXTERNAL
•
MATERIAL: COPPER ALLOY
TECHNICAL CHARACTERISTICS
NOMINAL PIPE SIZE DESIGNATION1.0 INCHES IN
OVERALL LENGTH1.0 INCHES NOMINAL IN
SPECIAL FEATURESMATERIAL CU NI 70/30 PER MIL-C-24679
SCREW THREAD SERIES DESIGNATORUNS
SCREW THREAD LOCATIONEXTERNAL
MATERIALCOPPER ALLOY
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

No substitute or cross-reference records for this part.

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 803-7657203ITEM77?
803-7657203ITEM77 is a THREAD PIECE,UNION.
What is the NSN for 803-7657203ITEM77?
803-7657203ITEM77 is cataloged in the U.S. Government catalog under NSN 4730-01-598-9607. 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.