PartsTable
Technical Data Sheet
Download PDF

NP-188 — NIPPLE,SPECIAL

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

NP-188: NIPPLE,SPECIAL.

The NIPPLE,SPECIAL is a the manufacturer industrial component. Key specifications include material: COPPER ALLOY, seat_type: ANGLE, thread_size: 0.250-18, overall_length: 2.500 INCHES NOMINAL IN, thread_direction: RIGHT-HAND, seat_angle_in_deg: 30.0. This part is cataloged in the U.S.

Government catalog under NSN 4730-01-109-3177, 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
NP-188
NSN: 4730-01-109-3177
NIINs: 011093177, 016141575
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 52929 — SUPERIOR PRODUCTS DIV OPW CES (USA)
SPECIFICATIONS
materialCOPPER ALLOY
seat_typeANGLE
thread_size0.250-18
overall_length2.500 INCHES NOMINAL IN
thread_directionRIGHT-HAND
seat_angle_in_deg30.0
end_connection_typeTHREADED
screw_thread_locationEXTERNAL
screw_thread_series_designatorNPT
working_pressure_and_service_type3000.0 POUNDS PER SQUARE INCH (PSI) NOMINAL AIR LBS
NSN4730-01-109-3177
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: NP-188 · 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
•
SEAT ANGLE IN DEG: 30.0
•
END CONNECTION TYPE: THREADED
•
SEAT TYPE: ANGLE
•
THREAD DIRECTION: RIGHT-HAND
•
THREAD SIZE: 0.250-18
•
SCREW THREAD SERIES DESIGNATOR: NPT
•
SCREW THREAD LOCATION: EXTERNAL
TECHNICAL CHARACTERISTICS
SEAT ANGLE IN DEG30.0
END CONNECTION TYPETHREADED
OVERALL LENGTH2.500 INCHES NOMINAL IN
SEAT TYPEANGLE
THREAD DIRECTIONRIGHT-HAND
THREAD SIZE0.250-18
SCREW THREAD SERIES DESIGNATORNPT
SCREW THREAD LOCATIONEXTERNAL
MATERIALCOPPER ALLOY
WORKING PRESSURE AND SERVICE TYPE3000.0 POUNDS PER SQUARE INCH (PSI) NOMINAL AIR LBS
SUBSTITUTES & CROSS-REFERENCES 2
NP188RReference document
Same NSN cross-reference
Reference document — Secondary reference
CGA-590Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
Ready to buy NP-188?
Compare prices from verified sellers on eBay
Buy on eBay →
As an eBay Partner, PartsTable may earn a commission. Your price is not affected.
FREQUENTLY ASKED QUESTIONS
What is NP-188?
NP-188 is a NIPPLE,SPECIAL.
What parts can replace NP-188?
There are 2 known substitutes for NP-188: NP188R, CGA-590. Substitute compatibility should be verified for your specific system.
What is the NSN for NP-188?
NP-188 is cataloged in the U.S. Government catalog under NSN 4730-01-109-3177. This indicates validated use in U.S. government and defense supply chains.
Community Feedback
Leave a Comment
Comments are reviewed before appearing. You will receive an email to verify before your comment appears.

Request a Quote — NP-188

✓ 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.