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ITEM 9 ✓ 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

CAPACITOR,VARIABLE,AIR DIELECTRI. Key specifications include material: COPPER OVERALL, nut_style: TUBE COUPLING, thread_class: 2B, thread_series: UNF, special_features: FOR NAVY NUCLEAR PROPULSION PLANT PRODUCTS ONLY, thread_direction: RIGHT-HAND. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-01-227-1879, 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
ITEM 9
NSN: 4730-01-227-1879
FSC: 4730
CAGE: 16166 — WESTERN ENTERPRISES DIV OF SCOTT AND FETZER CO (USA)
SPECIFICATIONS
materialCOPPER OVERALL
nut_styleTUBE COUPLING
thread_class2B
thread_seriesUNF
special_featuresFOR NAVY NUCLEAR PROPULSION PLANT PRODUCTS ONLY
thread_directionRIGHT-HAND
nominal_thread_size0.375 INCHES IN
thread_quantity_per_inch24
nominal_tube_outside_diameter0.188 INCHES IN
reference_number_differentiating_characteristicsAS DIFFERENTIATED BY FREE FROM MERCURY CONTAMINATION
NSN4730-01-227-1879
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: ITEM 9 · 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
•
NUT STYLE: TUBE COUPLING
•
MATERIAL: COPPER OVERALL
•
THREAD QUANTITY PER INCH: 24
•
THREAD DIRECTION: RIGHT-HAND
•
THREAD CLASS: 2B
•
THREAD SERIES: UNF
•
NOMINAL THREAD SIZE: 0.375 INCHES IN
TYPICAL APPLICATIONS
  • RAID cache protection during power loss events
  • Write-back cache enablement for storage controllers
  • Enterprise server data integrity assurance
  • Hot-swap battery/capacitor replacement in production
TECHNICAL CHARACTERISTICS (FLIS)
NUT STYLETUBE COUPLING
MATERIALCOPPER OVERALL
THREAD QUANTITY PER INCH24
THREAD DIRECTIONRIGHT-HAND
THREAD CLASS2B
THREAD SERIESUNF
SPECIAL FEATURESFOR NAVY NUCLEAR PROPULSION PLANT PRODUCTS ONLY
NOMINAL THREAD SIZE0.375 INCHES IN
NOMINAL TUBE OUTSIDE DIAMETER0.188 INCHES IN
REFERENCE NUMBER DIFFERENTIATING CHARACTERISTICSAS DIFFERENTIATED BY FREE FROM MERCURY CONTAMINATION
VERIFIED SUBSTITUTES & CROSS-REFERENCES 19
K854504-1Interchangeable
interchangeable cross-reference
interchangeable
N10Interchangeable
interchangeable cross-reference
interchangeable
G7780PC52Interchangeable
interchangeable cross-reference
interchangeable
3090-2PC7Interchangeable
interchangeable cross-reference
interchangeable
G7930PC79Interchangeable
interchangeable cross-reference
interchangeable
17-001-110Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is ITEM 9?
ITEM 9 is a CAPACITOR,VARIABLE,AIR DIELECTRI.
What parts can replace ITEM 9?
There are 19 known substitutes for ITEM 9: K854504-1, N10, G7780PC52 and 16 more. Substitute compatibility should be verified for your specific system.
What is the NSN for ITEM 9?
ITEM 9 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-01-227-1879. 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