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PartsTable / COMPONENT / 54B6971H21
54B6971H21 ✓ 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 PLUG,PIPE is a the manufacturer industrial component. Key specifications include material: COPPER ALLOY OVERALL, body_type: CORED, head_type: SOLID, core_depth: 0.594 INCHES MINIMUM AND 0.625 INCHES MAXIMUM IN, drive_end_style: RAISED SQUARE, connection_style: PLAIN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-187-4231, 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
54B6971H21
NSN: 4730-00-187-4231
FSC: 4730
CAGE: 79500 — WESTINGHOUSE ELECTRIC CORP (USA)
SPECIFICATIONS
materialCOPPER ALLOY OVERALL
body_typeCORED
head_typeSOLID
core_depth0.594 INCHES MINIMUM AND 0.625 INCHES MAXIMUM IN
drive_end_styleRAISED SQUARE
connection_stylePLAIN
thread_directionRIGHT-HAND EXTERNAL
body_core_diameter1.375 INCHES MINIMUM AND 1.422 INCHES MAXIMUM IN
nominal_thread_size1.500 INCHES EXTERNAL IN
thread_series_designatorNPT EXTERNAL
nondefinitive_spec/std_dataA CLASS AND 1 PRESSURE RATING
material_document_and_classificationQQ-S-390,COMP 3 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
NSN4730-00-187-4231
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 54B6971H21 · 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
•
BODY CORE DIAMETER: 1.375 INCHES MINIMUM AND 1.422 INCHES MAXIMUM IN
•
THREAD DIRECTION: RIGHT-HAND EXTERNAL
•
CONNECTION STYLE: PLAIN
•
NOMINAL PIPE SIZE FOR WHICH DESIGNED: 1.500 INCHES IN
•
MATERIAL: COPPER ALLOY OVERALL
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-S-390,COMP 3 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
•
CORE DEPTH: 0.594 INCHES MINIMUM AND 0.625 INCHES MAXIMUM IN
•
BODY TYPE: CORED
TECHNICAL CHARACTERISTICS (FLIS)
BODY CORE DIAMETER1.375 INCHES MINIMUM AND 1.422 INCHES MAXIMUM IN
THREAD DIRECTIONRIGHT-HAND EXTERNAL
CONNECTION STYLEPLAIN
NOMINAL PIPE SIZE FOR WHICH DESIGNED1.500 INCHES IN
MATERIALCOPPER ALLOY OVERALL
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-S-390,COMP 3 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
CORE DEPTH0.594 INCHES MINIMUM AND 0.625 INCHES MAXIMUM IN
BODY TYPECORED
DRIVE END STYLERAISED SQUARE
THREAD SERIES DESIGNATORNPT EXTERNAL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 3
ASME B16.15Interchangeable
interchangeable cross-reference
interchangeable
MS14314-8YInterchangeable
interchangeable cross-reference
interchangeable
WW-P-460Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 54B6971H21?
54B6971H21 is a PLUG,PIPE.
What parts can replace 54B6971H21?
There are 3 known substitutes for 54B6971H21: ASME B16.15, MS14314-8Y, WW-P-460. Substitute compatibility should be verified for your specific system.
Is 54B6971H21 still available?
54B6971H21 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