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PartsTable / COMPONENT / 1889863PC157
1889863PC157 ✓ Verified by PartsTable
— · HOSE FITTING
WHAT YOU NEED TO KNOW
PTFE tape on tapered threads (NPT/BSPT) JIC/AN flare connections seal metal-to-metal — no tape
NPT != BSPT — look identical, NOT interchangeable
PRODUCT OVERVIEW

The ADAPTER,STRAIGHT,TUBE TO BOSS is a the manufacturer industrial component. Key specifications include material: COPPER ALLOY OVERALL, thread_class: 2A SECOND END A, connection_type: UNTHREADED INTERNAL TUBE FIRST END, special_features: FOR NAVY NUCLEAR PROPULSION PLANT PRODUCTS ONLY, operating_pressure: 700.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS, nominal_thread_size: 1.594 INCHES SECOND END IN. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-01-175-5443, 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
1889863PC157
NSN: 4730-01-175-5443
FSC: 4730
CAGE: 80064 — NAVAL SHIP SYSTEMS COMMAND (USA)
SPECIFICATIONS
materialCOPPER ALLOY OVERALL
thread_class2A SECOND END A
connection_typeUNTHREADED INTERNAL TUBE FIRST END
special_featuresFOR NAVY NUCLEAR PROPULSION PLANT PRODUCTS ONLY
operating_pressure700.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
nominal_thread_size1.594 INCHES SECOND END IN
nominal_overall_length1.330 INCHES IN
thread_quantity_per_inch20 SECOND END
thread_series_designatorUNS SECOND END
criticality_code_justificationZZZY
nominal_outside_diameter_tube_accommodated1.125 INCHES FIRST END IN
reference_number_differentiating_characteristicsAS DIFFERENTIATED BY FREE FROM MERCURY CONTAMINATION
NSN4730-01-175-5443
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 1889863PC157 · 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 TYPE: UNTHREADED INTERNAL TUBE FIRST END
•
NOMINAL THREAD SIZE: 1.594 INCHES SECOND END IN
•
REFERENCE NUMBER DIFFERENTIATING CHARACTERISTICS: AS DIFFERENTIATED BY FREE FROM MERCURY CONTAMINATION
•
MATERIAL: COPPER ALLOY OVERALL
•
NOMINAL OUTSIDE DIAMETER TUBE ACCOMMODATED: 1.125 INCHES FIRST END IN
•
OPERATING PRESSURE: 700.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
•
NOMINAL OVERALL LENGTH: 1.330 INCHES IN
TECHNICAL CHARACTERISTICS (FLIS)
CONNECTION TYPEUNTHREADED INTERNAL TUBE FIRST END
NOMINAL THREAD SIZE1.594 INCHES SECOND END IN
REFERENCE NUMBER DIFFERENTIATING CHARACTERISTICSAS DIFFERENTIATED BY FREE FROM MERCURY CONTAMINATION
MATERIALCOPPER ALLOY OVERALL
NOMINAL OUTSIDE DIAMETER TUBE ACCOMMODATED1.125 INCHES FIRST END IN
OPERATING PRESSURE700.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
SPECIAL FEATURESFOR NAVY NUCLEAR PROPULSION PLANT PRODUCTS ONLY
NOMINAL OVERALL LENGTH1.330 INCHES IN
CRITICALITY CODE JUSTIFICATIONZZZY
THREAD SERIES DESIGNATORUNS SECOND END
VERIFIED SUBSTITUTES & CROSS-REFERENCES 26
N9-845-193PC57Interchangeable
interchangeable cross-reference
interchangeable
8691-052REVAPC54Interchangeable
interchangeable cross-reference
interchangeable
578-9200-1572633REVDPC54Interchangeable
interchangeable cross-reference
interchangeable
5409-S17-6-4Interchangeable
interchangeable cross-reference
interchangeable
503-4556027 ITEM 17Interchangeable
interchangeable cross-reference
interchangeable
2670-57ITEM17Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 1889863PC157?
1889863PC157 is a ADAPTER,STRAIGHT,TUBE TO BOSS.
What parts can replace 1889863PC157?
There are 26 known substitutes for 1889863PC157: N9-845-193PC57, 8691-052REVAPC54, 578-9200-1572633REVDPC54 and 23 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 1889863PC157?
1889863PC157 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-01-175-5443. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026