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Technical Data Sheet
PartsTable / COMPONENT / ANSI B16.3
ANSI B16.3 ✓ 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 ANSI B16.3 is a the manufacturer industrial component. This product is currently in active production with full OEM support. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-057-2971, 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
ANSI B16.3
NSN: 4730-00-057-2971
FSC: 4730
CAGE: 80204 — AMERICAN NATIONAL STANDARDS INSTITUTE INCORPORATED DBA AMERICAN NATIONAL STANDARDS INSTITUTE (USA)
SPECIFICATIONS
Part NumberANSI B16.3
NSN4730-00-057-2971
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: ANSI B16.3 · 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
•
LEG LENGTH: 1.125 INCHES NOMINAL ALL ENDS IN
•
FLOW ANGLE: 90.0 DEGREES
•
MATERIAL: IRON OVERALL
•
THREAD SERIES DESIGNATOR: NPT FIRST END
•
NOMINAL THREAD SIZE: 0.500 INCHES FIRST END IN
•
SPECIFICATION/STANDARD DATA: 81343-WWP-521 GOVERNMENT SPECIFICATION AND 80204-ANSI B16.3 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
•
NONDEFINITIVE SPEC/STD DATA: 1 TYPE
TECHNICAL CHARACTERISTICS (FLIS)
LEG LENGTH1.125 INCHES NOMINAL ALL ENDS IN
SPECIAL FEATURESGRUMMAN A10 AIRCRAFT
FLOW ANGLE90.0 DEGREES
MATERIALIRON OVERALL
THREAD SERIES DESIGNATORNPT FIRST END
NOMINAL THREAD SIZE0.500 INCHES FIRST END IN
SPECIFICATION/STANDARD DATA81343-WWP-521 GOVERNMENT SPECIFICATION AND 80204-ANSI B16.3 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
NONDEFINITIVE SPEC/STD DATA1 TYPE
VERIFIED SUBSTITUTES & CROSS-REFERENCES 16
ANSI B16.3Interchangeable
interchangeable cross-reference
interchangeable
WW-P-521Interchangeable
interchangeable cross-reference
interchangeable
23A46Interchangeable
interchangeable cross-reference
interchangeable
0001346Interchangeable
interchangeable cross-reference
interchangeable
45-2036-300-013Interchangeable
interchangeable cross-reference
interchangeable
144162Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is ANSI B16.3?
ANSI B16.3 is a ANSI B16.3.
What parts can replace ANSI B16.3?
There are 16 known substitutes for ANSI B16.3: ANSI B16.3, WW-P-521, 23A46 and 13 more. Substitute compatibility should be verified for your specific system.
What is the NSN for ANSI B16.3?
ANSI B16.3 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-057-2971. 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