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Technical Data Sheet
PartsTable / COMPONENT / S-327-21/2X21/2
S-327-21/2X21/2 ✓ 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 S-327-21/2X21/2 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 4730-00-541-6551, 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
S-327-21/2X21/2
NSN: 4730-00-541-6551
FSC: 4730
CAGE: 20266 — ELKHART BRASS MANUFACTURING COMPANY, LLC DIV ELKHART BRASS MANUFACTURING COMPANY (USA)
SPECIFICATIONS
Part NumberS-327-21/2X21/2
NSN4730-00-541-6551
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: S-327-21/2X21/2 · 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
•
THREAD SERIES DESIGNATOR: NPT FIRST END
•
CONNECTION TYPE: THREADED EXTERNAL PIPE FIRST END
•
NOMINAL OVERALL LENGTH: 2.937 INCHES IN
•
CONNECTION STYLE: SWIVEL NUT, GASKET SEAL (HOSE) SECOND END
•
MATERIAL: COPPER ALLOY OVERALL
•
THREAD QUANTITY PER INCH: 7-1/2 SECOND END
TECHNICAL CHARACTERISTICS (FLIS)
THREAD SERIES DESIGNATORNPT FIRST END
CONNECTION TYPETHREADED EXTERNAL PIPE FIRST END
NOMINAL OVERALL LENGTH2.937 INCHES IN
THREAD SERIES DESIGNATORNH SECOND END
CONNECTION STYLESWIVEL NUT, GASKET SEAL (HOSE) SECOND END
CONNECTION TYPETHREADED INTERNAL HOSE SECOND END
MATERIALCOPPER ALLOY OVERALL
THREAD QUANTITY PER INCH7-1/2 SECOND END
NOMINAL INSIDE DIAMETER HOSE ACCOMMODATED2.500 INCHES SECOND END IN
NOMINAL THREAD SIZE2.500 INCHES SECOND END IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 25
7762919P2Interchangeable
interchangeable cross-reference
interchangeable
SA188UInterchangeable
interchangeable cross-reference
interchangeable
7762919P5Interchangeable
interchangeable cross-reference
interchangeable
FF-B-187AInterchangeable
interchangeable cross-reference
interchangeable
BT28315Interchangeable
interchangeable cross-reference
interchangeable
28315Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is S-327-21/2X21/2?
S-327-21/2X21/2 is a S-327-21/2X21/2.
What parts can replace S-327-21/2X21/2?
There are 25 known substitutes for S-327-21/2X21/2: 7762919P2, SA188U, 7762919P5 and 22 more. Substitute compatibility should be verified for your specific system.
What is the NSN for S-327-21/2X21/2?
S-327-21/2X21/2 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-541-6551. 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