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B5597-2 — CAP,FILLER OPENING

✓ Government record, cited
— · COMPONENT
PRODUCT OVERVIEW

B5597-2: CAP,FILLER OPENING.

The CAP,FILLER OPENING is a the manufacturer industrial component. Key specifications include material: COPPER ALLOY OVERALL, thread_length: 0.688 INCHES NOMINAL IN, overall_height: 1.188 INCHES NOMINAL IN, thread_diameter: 4.000 INCHES NOMINAL IN, outside_diameter: 5.250 INCHES NOMINAL IN, special_features: FUSIBLE ELEMENT 165 F MELTING POINT. This part is cataloged in the U.S.

Government catalog under NSN 2590-01-161-2680, 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
B5597-2
NSN: 2590-01-161-2680
FSC: 2590 — Miscellaneous Vehicular Components
CAGE: 72464 — CUTLER METAL PRODUCTS CO (USA)
SPECIFICATIONS
materialCOPPER ALLOY OVERALL
thread_length0.688 INCHES NOMINAL IN
overall_height1.188 INCHES NOMINAL IN
thread_diameter4.000 INCHES NOMINAL IN
outside_diameter5.250 INCHES NOMINAL IN
special_featuresFUSIBLE ELEMENT 165 F MELTING POINT
style_designatorVENTED THREADED TYPE (INTERNAL)
features_providedFUSIBLE SAFETY PLUG
accommodation_typePLAIN END GRIPPING
retaining_device_typeCHAIN
pressure_relief_methodAUTOMATIC
thread_series_designatorNPT
NSN2590-01-161-2680
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available CAP,FILLER OPENING TITLE COMPONENT PN B5597-2 MFR CAP,FILLER OPENING
KEY FEATURES
•
ACCOMMODATION TYPE: PLAIN END GRIPPING
•
THREAD LENGTH: 0.688 INCHES NOMINAL IN
•
RETAINING DEVICE TYPE: CHAIN
•
STYLE DESIGNATOR: VENTED THREADED TYPE (INTERNAL)
•
THREAD DIAMETER: 4.000 INCHES NOMINAL IN
•
OUTSIDE DIAMETER: 5.250 INCHES NOMINAL IN
•
FEATURES PROVIDED: FUSIBLE SAFETY PLUG
TECHNICAL CHARACTERISTICS
OVERALL HEIGHT1.188 INCHES NOMINAL IN
ACCOMMODATION TYPEPLAIN END GRIPPING
THREAD LENGTH0.688 INCHES NOMINAL IN
RETAINING DEVICE TYPECHAIN
STYLE DESIGNATORVENTED THREADED TYPE (INTERNAL)
THREAD DIAMETER4.000 INCHES NOMINAL IN
OUTSIDE DIAMETER5.250 INCHES NOMINAL IN
FEATURES PROVIDEDFUSIBLE SAFETY PLUG
SYSTEM FOR WHICH DESIGNEDPRESSURIZED
PRESSURE RELIEF METHODAUTOMATIC
OTHER ITEMS IN FSC 2590 — Miscellaneous Vehicular Components
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
2590-00-006-7503 2590-00-007-2356 2590-01-151-9629 2590-01-445-9216 2590-01-468-7350 2590-01-600-0314 2590-01-600-0319 2590-01-608-6611
SUBSTITUTES & CROSS-REFERENCES 1
2BF658Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is B5597-2?
B5597-2 is a CAP,FILLER OPENING.
What parts can replace B5597-2?
There is 1 known substitute for B5597-2: 2BF658. Substitute compatibility should be verified for your specific system.
What is the NSN for B5597-2?
B5597-2 is cataloged in the U.S. Government catalog under NSN 2590-01-161-2680. This indicates validated use in U.S. government and defense supply chains.
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✓ 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.