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Technical Data Sheet
PartsTable / COMPONENT / 55837-5
55837-5 ✓ 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 end_item_identification: 4130-01-565-7655;SMALL FIELD REFRIGERATION SYSTEM, part_name_assigned_by_controlling_agency: NUT,CAPTIVE. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-01-056-8803, 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
55837-5
NSN: 4730-01-056-8803
FSC: 4730
CAGE: 99167 — HAMILTON SUNDSTRAND CORPORATION (USA)
SPECIFICATIONS
end_item_identification4130-01-565-7655;SMALL FIELD REFRIGERATION SYSTEM
part_name_assigned_by_controlling_agencyNUT,CAPTIVE
NSN4730-01-056-8803
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 55837-5 · 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 THREAD SIZE: 1.000 INCHES THIRD END IN
•
MATERIAL: IRON MALLEABLE OVERALL
•
CONNECTION STYLE: PLAIN (PIPE) SECOND END
•
MATERIAL DOCUMENT AND CLASSIFICATION: ASTM A197 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
•
LEG LENGTH: 2.125 INCHES NOMINAL SECOND END IN
•
THREAD SERIES DESIGNATOR: NPT ALL ENDS
•
SURFACE TREATMENT: ZINC OVERALL
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)
NOMINAL THREAD SIZE1.000 INCHES THIRD END IN
MATERIALIRON MALLEABLE OVERALL
CONNECTION STYLEPLAIN (PIPE) SECOND END
MATERIAL DOCUMENT AND CLASSIFICATIONASTM A197 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
LEG LENGTH2.125 INCHES NOMINAL SECOND END IN
THREAD SERIES DESIGNATORNPT ALL ENDS
LEG LENGTH1.500 INCHES NOMINAL THIRD END IN
SURFACE TREATMENTZINC OVERALL
LEG LENGTH1.500 INCHES NOMINAL FIRST END IN
OPERATING PRESSURE150.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
VERIFIED SUBSTITUTES & CROSS-REFERENCES 18
6371Interchangeable
interchangeable cross-reference
interchangeable
R103B15Interchangeable
interchangeable cross-reference
interchangeable
D14131-15Interchangeable
interchangeable cross-reference
interchangeable
A-129766Interchangeable
interchangeable cross-reference
interchangeable
129766Interchangeable
interchangeable cross-reference
interchangeable
MILF2692Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 55837-5?
55837-5 is a CAPACITOR,VARIABLE,AIR DIELECTRI.
What parts can replace 55837-5?
There are 18 known substitutes for 55837-5: 6371, R103B15, D14131-15 and 15 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 55837-5?
55837-5 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-01-056-8803. 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