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Technical Data Sheet
PartsTable / COMPONENT / 183-2-1/2
183-2-1/2 ✓ 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 183-2-1/2 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 4730-01-417-6674, 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
183-2-1/2
NSN: 4730-01-417-6674
FSC: 4730
CAGE: 82666 — STOCKHAM VALVES AND FITTINGS INC (USA)
SPECIFICATIONS
Part Number183-2-1/2
NSN4730-01-417-6674
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 183-2-1/2 · 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 DIRECTION: RIGHT-HAND EXTERNAL
•
NOMINAL THREAD SIZE: 2.500 INCHES EXTERNAL IN
•
MATERIAL: IRON CAST MALLEABLE BODY
•
BODY TYPE: SOLID
•
DRIVE END STYLE: RAISED SQUARE
•
NOMINAL PIPE SIZE FOR WHICH DESIGNED: 2.500 INCHES IN
•
THREAD SERIES DESIGNATOR: NPT EXTERNAL
•
HEAD TYPE: SOLID
TECHNICAL CHARACTERISTICS (FLIS)
THREAD DIRECTIONRIGHT-HAND EXTERNAL
NOMINAL THREAD SIZE2.500 INCHES EXTERNAL IN
MATERIALIRON CAST MALLEABLE BODY
BODY TYPESOLID
DRIVE END STYLERAISED SQUARE
NOMINAL PIPE SIZE FOR WHICH DESIGNED2.500 INCHES IN
THREAD SERIES DESIGNATORNPT EXTERNAL
HEAD TYPESOLID
END ITEM IDENTIFICATION3895013445480.
CONNECTION STYLEPLAIN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 4
C05212Interchangeable
interchangeable cross-reference
interchangeable
SP1832Interchangeable
interchangeable cross-reference
interchangeable
1832-12Interchangeable
interchangeable cross-reference
interchangeable
180000 ITEM 3Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 183-2-1/2?
183-2-1/2 is a 183-2-1/2.
What parts can replace 183-2-1/2?
There are 4 known substitutes for 183-2-1/2: C05212, SP1832, 1832-12 and 1 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 183-2-1/2?
183-2-1/2 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-01-417-6674. 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