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C2U189 — BOLT,FLUID PASSAGE

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

C2U189: BOLT,FLUID PASSAGE.

The BOLT,FLUID PASSAGE is a the manufacturer industrial component. Key specifications include material: STEEL, body_style: PLAIN, head_diameter: 1.000 INCHES NOMINAL IN, overall_length: 0.250 INCHES NOMINAL IN, special_features: ONE END GREASE NIPPLE ALEMITE 1641, surface_treatment: DICHROMATE AND ZINC. This part is cataloged in the U.S.

Government catalog under NSN 4730-00-028-8088, 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
C2U189
NSN: 4730-00-028-8088
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 71867 — DE HAVILLAND AIRCRAFT OF CANADA LIMITED (CAN)
SPECIFICATIONS
materialSTEEL
body_stylePLAIN
head_diameter1.000 INCHES NOMINAL IN
overall_length0.250 INCHES NOMINAL IN
special_featuresONE END GREASE NIPPLE ALEMITE 1641
surface_treatmentDICHROMATE AND ZINC
concentric_hole_depth1.031 INCHES NOMINAL IN
first_end_thread_class3A A
second_end_seat_radius0.062 INCHES NOMINAL IN
first_end_thread_length0.500 INCHES NOMINAL IN
second_end_thread_class3B
wrenching_feature_styleROUND WITH WRENCH FLATS
NSN4730-00-028-8088
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: C2U189 · 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
•
FIRST END THREAD SERIES DESIGNATOR: UNF
•
FIRST END THREAD DIRECTION: RIGHT-HAND
•
SECOND END NOMINAL THREAD SIZE: 0.250 INCHES IN
•
LENGTH FROM BEARING SURFACE OF WRENCHING FEATURE TO END OF FIRST DIAMETER: 1.400 INCHES NOMINAL IN
•
SECOND END THREAD CLASS: 3B
•
BODY STYLE: PLAIN
•
DISTANCE FROM CENTERLINE TO FLAT: 0.437 INCHES NOMINAL IN
•
FIRST END THREAD CLASS: 3A A
TECHNICAL CHARACTERISTICS
FIRST END THREAD SERIES DESIGNATORUNF
FIRST END THREAD DIRECTIONRIGHT-HAND
SECOND END NOMINAL THREAD SIZE0.250 INCHES IN
LENGTH FROM BEARING SURFACE OF WRENCHING FEATURE TO END OF FIRST DIAMETER1.400 INCHES NOMINAL IN
SECOND END THREAD CLASS3B
BODY STYLEPLAIN
DISTANCE FROM CENTERLINE TO FLAT0.437 INCHES NOMINAL IN
FIRST END THREAD CLASS3A A
COTTER PIN HOLE DIAMETER0.016 INCHES NOMINAL IN
FIRST END STYLE DESIGNATORPLAIN
SUBSTITUTES & CROSS-REFERENCES 2
5306L20-013Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
C4875Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is C2U189?
C2U189 is a BOLT,FLUID PASSAGE.
What parts can replace C2U189?
There are 2 known substitutes for C2U189: 5306L20-013, C4875. Substitute compatibility should be verified for your specific system.
What is the NSN for C2U189?
C2U189 is cataloged in the U.S. Government catalog under NSN 4730-00-028-8088. This indicates validated use in U.S. government and defense supply chains.
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