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221-1843 — PLUG,PIPE

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

221-1843: PLUG,PIPE.

The PLUG,PIPE is a the manufacturer industrial component. Key specifications include material: STEEL COMP 1018 OVERALL, body_type: SOLID, thread_class: 2A EXTERNAL A, drive_end_style: RECESSED HEXAGON, connection_style: PLAIN, special_features: ROCKWELL HARDNESS RATING,C26 TO C32. This part is cataloged in the U.S.

Government catalog under NSN 4730-01-066-0128, 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
221-1843
NSN: 4730-01-066-0128
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 10988 — CNH INDUSTRIAL AMERICA LLC DBA CNH AMERICA (USA)
SPECIFICATIONS
materialSTEEL COMP 1018 OVERALL
body_typeSOLID
thread_class2A EXTERNAL A
drive_end_styleRECESSED HEXAGON
connection_stylePLAIN
special_featuresROCKWELL HARDNESS RATING,C26 TO C32
thread_directionRIGHT-HAND EXTERNAL
surface_treatmentZINC OVERALL
nominal_thread_size0.375 INCHES EXTERNAL IN
thread_quantity_per_inch18 EXTERNAL
thread_series_designatorNPT EXTERNAL
nominal_pipe_size_for_which_designed0.375 INCHES IN
NSN4730-01-066-0128
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 221-1843 · 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
•
NOMINAL PIPE SIZE FOR WHICH DESIGNED: 0.375 INCHES IN
•
CONNECTION STYLE: PLAIN
•
DRIVE END STYLE: RECESSED HEXAGON
•
THREAD DIRECTION: RIGHT-HAND EXTERNAL
•
NOMINAL THREAD SIZE: 0.375 INCHES EXTERNAL IN
•
SURFACE TREATMENT: ZINC OVERALL
•
BODY TYPE: SOLID
TECHNICAL CHARACTERISTICS
NOMINAL PIPE SIZE FOR WHICH DESIGNED0.375 INCHES IN
CONNECTION STYLEPLAIN
DRIVE END STYLERECESSED HEXAGON
THREAD DIRECTIONRIGHT-HAND EXTERNAL
NOMINAL THREAD SIZE0.375 INCHES EXTERNAL IN
SPECIAL FEATURESROCKWELL HARDNESS RATING,C26 TO C32
SURFACE TREATMENTZINC OVERALL
BODY TYPESOLID
THREAD CLASS2A EXTERNAL A
THREAD QUANTITY PER INCH18 EXTERNAL
SUBSTITUTES & CROSS-REFERENCES 1
217435Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 221-1843?
221-1843 is a PLUG,PIPE.
What parts can replace 221-1843?
There is 1 known substitute for 221-1843: 217435. Substitute compatibility should be verified for your specific system.
What is the NSN for 221-1843?
221-1843 is cataloged in the U.S. Government catalog under NSN 4730-01-066-0128. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.