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Technical Data Sheet
PartsTable / COMPONENT / 2670-57 ITEM 5
2670-57 ITEM 5 ✓ 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 COUPLING HALF,SELF-SEALING is a the manufacturer industrial component. Key specifications include material: STEEL BODY, thread_class: 2B ALL ENDS, connection_type: THREADED INTERNAL BOSS FIRST FLUID END CONNECTION, connection_style: BOSS GASKET SEAL ALL ENDS, style_designator: MALE COUPLING HALF, operating_pressure: 400.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-01-179-5471, 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
2670-57 ITEM 5
NSN: 4730-01-179-5471
FSC: 4730
CAGE: 43689 — HUNTINGTON INGALLS INC DIV NEWPORT NEWS SHIPBUILDING (USA)
SPECIFICATIONS
materialSTEEL BODY
thread_class2B ALL ENDS
connection_typeTHREADED INTERNAL BOSS FIRST FLUID END CONNECTION
connection_styleBOSS GASKET SEAL ALL ENDS
style_designatorMALE COUPLING HALF
operating_pressure400.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
nominal_thread_size0.562 INCHES ALL ENDS IN
thread_series_designatorUNF ALL ENDS
NSN4730-01-179-5471
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 2670-57 ITEM 5 · 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
•
MATERIAL: STEEL BODY
•
OPERATING PRESSURE: 400.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
•
NOMINAL THREAD SIZE: 0.562 INCHES ALL ENDS IN
•
THREAD CLASS: 2B ALL ENDS
•
CONNECTION STYLE: BOSS GASKET SEAL ALL ENDS
•
CONNECTION TYPE: THREADED INTERNAL BOSS FIRST FLUID END CONNECTION
•
THREAD SERIES DESIGNATOR: UNF ALL ENDS
•
STYLE DESIGNATOR: MALE COUPLING HALF
TECHNICAL CHARACTERISTICS (FLIS)
MATERIALSTEEL BODY
OPERATING PRESSURE400.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
NOMINAL THREAD SIZE0.562 INCHES ALL ENDS IN
THREAD CLASS2B ALL ENDS
CONNECTION STYLEBOSS GASKET SEAL ALL ENDS
CONNECTION TYPETHREADED INTERNAL BOSS FIRST FLUID END CONNECTION
THREAD SERIES DESIGNATORUNF ALL ENDS
STYLE DESIGNATORMALE COUPLING HALF
VERIFIED SUBSTITUTES & CROSS-REFERENCES 28
6050-223PC102Interchangeable
interchangeable cross-reference
interchangeable
2632-0962 PC5Interchangeable
interchangeable cross-reference
interchangeable
5400-S5-8Interchangeable
interchangeable cross-reference
interchangeable
267057Interchangeable
interchangeable cross-reference
interchangeable
DD19CA061Interchangeable
interchangeable cross-reference
interchangeable
NFT5-4Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 2670-57 ITEM 5?
2670-57 ITEM 5 is a COUPLING HALF,SELF-SEALING.
What parts can replace 2670-57 ITEM 5?
There are 28 known substitutes for 2670-57 ITEM 5: 6050-223PC102, 2632-0962 PC5, 5400-S5-8 and 25 more. Substitute compatibility should be verified for your specific system.
Is 2670-57 ITEM 5 still available?
2670-57 ITEM 5 is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026