PartsTable
Technical Data Sheet
MS51504-B8 ✓ 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,FIXED,PAPER DIELECTRIC. Key specifications include material: STEEL COMP 12L14 OVERALL, flow_angle: 90.0 DEGREES, leg_length: 1.250 INCHES NOMINAL FIRST END IN, seat_angle: 37.0 DEGREES FIRST END, thread_class: 2A FIRST END A, connection_type: THREADED EXTERNAL TUBE FIRST END. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-359-3103, 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
MS51504-B8
NSN: 4730-00-359-3103
FSC: 4730
CAGE: 96906 — MILITARY STANDARDS PROMULGATED BY MILITARY DEPARTMENTS UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M
SPECIFICATIONS
materialSTEEL COMP 12L14 OVERALL
flow_angle90.0 DEGREES
leg_length1.250 INCHES NOMINAL FIRST END IN
seat_angle37.0 DEGREES FIRST END
thread_class2A FIRST END A
connection_typeTHREADED EXTERNAL TUBE FIRST END
connection_stylePLAIN (PIPE) SECOND END
surface_treatmentCADMIUM OVERALL
nominal_thread_size0.750 INCHES FIRST END IN
maximum_operating_temp121.0 FAHRENHEIT SINGLE RESPONSE DEGF
media_for_which_designedHYDRAULIC FLUID SINGLE RESPONSE
thread_series_designatorNPTF SECOND END
NSN4730-00-359-3103
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: MS51504-B8 · 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
THREAD SERIES DESIGNATOR: UNF FIRST END
MATERIAL DOCUMENT AND CLASSIFICATION: 66 FED STD SINGLE MATERIAL RESPONSE OVERALL
SURFACE TREATMENT: CADMIUM OVERALL
FLOW ANGLE: 90.0 DEGREES
SEAT ANGLE: 37.0 DEGREES FIRST END
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: QQ-P-416,TY 2,CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
SPECIFICATION/STANDARD DATA: 96906-MS51504 GOVERNMENT STANDARD
MEDIA FOR WHICH DESIGNED: HYDRAULIC FLUID SINGLE RESPONSE
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)
THREAD SERIES DESIGNATORUNF FIRST END
MATERIAL DOCUMENT AND CLASSIFICATION66 FED STD SINGLE MATERIAL RESPONSE OVERALL
SURFACE TREATMENTCADMIUM OVERALL
FLOW ANGLE90.0 DEGREES
SEAT ANGLE37.0 DEGREES FIRST END
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-416,TY 2,CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
SPECIFICATION/STANDARD DATA96906-MS51504 GOVERNMENT STANDARD
MEDIA FOR WHICH DESIGNEDHYDRAULIC FLUID SINGLE RESPONSE
CONNECTION STYLEFLARED (TUBE) FIRST END
MAXIMUM OPERATING TEMP121.0 FAHRENHEIT SINGLE RESPONSE DEGF
VERIFIED SUBSTITUTES & CROSS-REFERENCES 16
10460Interchangeable
interchangeable cross-reference
interchangeable
EE42238Interchangeable
interchangeable cross-reference
interchangeable
5405X8Interchangeable
interchangeable cross-reference
interchangeable
C5405X8Interchangeable
interchangeable cross-reference
interchangeable
B4029353Interchangeable
interchangeable cross-reference
interchangeable
10527014Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is MS51504-B8?
MS51504-B8 is a CAPACITOR,FIXED,PAPER DIELECTRIC.
What parts can replace MS51504-B8?
There are 16 known substitutes for MS51504-B8: 10460, EE42238, 5405X8 and 13 more. Substitute compatibility should be verified for your specific system.
What is the NSN for MS51504-B8?
MS51504-B8 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-359-3103. This indicates validated use in U.S. government and defense supply chains.
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