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PartsTable / COMPONENT / BB61S53-021PC389
BB61S53-021PC389 ✓ 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: STEEL COMP 303, thread_size: 1.000-14, thread_class: 3B, thread_length: 0.500 INCHES NOMINAL IN, overall_length: 1.000 INCHES NOMINAL IN, special_features: SMALLEST OD ON BOTTOM OF NUT 47/64 IN. 1/4 IN.

LG IN. This product is currently in active production with full OEM support. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-274-3351, 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
BB61S53-021PC389
NSN: 4730-00-274-3351
FSC: 4730
CAGE: 80064 — NAVAL SHIP SYSTEMS COMMAND (USA)
SPECIFICATIONS
materialSTEEL COMP 303
thread_size1.000-14
thread_class3B
thread_length0.500 INCHES NOMINAL IN
overall_length1.000 INCHES NOMINAL IN
special_featuresSMALLEST OD ON BOTTOM OF NUT 47/64 IN. 1/4 IN. LG IN
style_designatorHEXAGON, EXTERNAL THREAD, INVERTED FLARE
thread_directionRIGHT-HAND
seat_angle_in_deg25.0
width_across_flats1.125 INCHES NOMINAL IN
screw_thread_locationINTERNAL
casehardening_indicatorNOT CASEHARDENED
NSN4730-00-274-3351
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: BB61S53-021PC389 · 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
•
CASEHARDENING INDICATOR: NOT CASEHARDENED
•
THREAD LENGTH: 0.500 INCHES NOMINAL IN
•
SMALLEST INSIDE DIAMETER: 0.266 INCHES NOMINAL IN
•
SCREW THREAD LOCATION: INTERNAL
•
STYLE DESIGNATOR: HEXAGON, EXTERNAL THREAD, INVERTED FLARE
•
WIDTH ACROSS FLATS: 1.125 INCHES NOMINAL 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)
OVERALL LENGTH1.000 INCHES NOMINAL IN
CASEHARDENING INDICATORNOT CASEHARDENED
THREAD LENGTH0.500 INCHES NOMINAL IN
SMALLEST INSIDE DIAMETER0.266 INCHES NOMINAL IN
SCREW THREAD LOCATIONINTERNAL
STYLE DESIGNATORHEXAGON, EXTERNAL THREAD, INVERTED FLARE
WIDTH ACROSS FLATS1.125 INCHES NOMINAL IN
SPECIAL FEATURESSMALLEST OD ON BOTTOM OF NUT 47/64 IN. 1/4 IN. LG IN
MATERIALSTEEL COMP 303
SCREW THREAD SERIES DESIGNATORUNF
VERIFIED SUBSTITUTES & CROSS-REFERENCES 21
2-2WBZBInterchangeable
interchangeable cross-reference
interchangeable
200-61Interchangeable
interchangeable cross-reference
interchangeable
C45-5004-03Interchangeable
interchangeable cross-reference
interchangeable
5004-03-01Interchangeable
interchangeable cross-reference
interchangeable
44471Interchangeable
interchangeable cross-reference
interchangeable
GGG-D-751 TYCInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is BB61S53-021PC389?
BB61S53-021PC389 is a CAPACITOR,VARIABLE,AIR DIELECTRI.
What parts can replace BB61S53-021PC389?
There are 21 known substitutes for BB61S53-021PC389: 2-2WBZB, 200-61, C45-5004-03 and 18 more. Substitute compatibility should be verified for your specific system.
What is the NSN for BB61S53-021PC389?
BB61S53-021PC389 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-274-3351. 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