PartsTable
Technical Data Sheet
MS51523A12 ✓ 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

The ADAPTER,STRAIGHT,TUBE TO BOSS is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, leg_length: 1.660 INCHES NOMINAL THIRD END IN, seat_angle: 37.0 DEGREES ALL ENDS, thread_class: 2A THIRD END A, connection_type: THREADED INTERNAL TUBE FIRST END, connection_style: FLARED (TUBE) SECOND 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 4730-01-104-7503, 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
MS51523A12
NSN: 4730-01-104-7503
FSC: 4730
CAGE: 0FW39 — BAE SYSTEMS TACTICAL VEHICLE SYSTEMS LP DBA DATA SYSTEMS INTERNATIONAL INC (USA)
SPECIFICATIONS
materialSTEEL OVERALL
leg_length1.660 INCHES NOMINAL THIRD END IN
seat_angle37.0 DEGREES ALL ENDS
thread_class2A THIRD END A
connection_typeTHREADED INTERNAL TUBE FIRST END
connection_styleFLARED (TUBE) SECOND END
surface_treatmentCADMIUM OVERALL
nominal_thread_size1.062 INCHES ALL ENDS IN
thread_quantity_per_inch12 ALL ENDS
thread_series_designatorUN ALL ENDS
specification/standard_data96906-MS51523 GOVERNMENT STANDARD
furnished_items_and_quantity2 TUBE COUPLING NUT W/SLEEVE
NSN4730-01-104-7503
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: MS51523A12 · 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: UN ALL ENDS
LEG LENGTH: 1.660 INCHES NOMINAL SECOND END IN
FURNISHED ITEMS AND QUANTITY: 2 TUBE COUPLING NUT W/SLEEVE
CONNECTION TYPE: THREADED INTERNAL TUBE FIRST END
SPECIFICATION/STANDARD DATA: 96906-MS51523 GOVERNMENT STANDARD
NOMINAL OUTSIDE DIAMETER TUBE ACCOMMODATED: 0.750 INCHES ALL ENDS IN
MATERIAL: STEEL OVERALL
CONNECTION STYLE: SWIVEL NUT, FLARE (TUBE) STYLE 3 OPTIONAL END FIRST END
TECHNICAL CHARACTERISTICS (FLIS)
THREAD SERIES DESIGNATORUN ALL ENDS
LEG LENGTH1.660 INCHES NOMINAL SECOND END IN
FURNISHED ITEMS AND QUANTITY2 TUBE COUPLING NUT W/SLEEVE
CONNECTION TYPETHREADED INTERNAL TUBE FIRST END
SPECIFICATION/STANDARD DATA96906-MS51523 GOVERNMENT STANDARD
NOMINAL OUTSIDE DIAMETER TUBE ACCOMMODATED0.750 INCHES ALL ENDS IN
MATERIALSTEEL OVERALL
CONNECTION STYLESWIVEL NUT, FLARE (TUBE) STYLE 3 OPTIONAL END FIRST END
CONNECTION STYLEFLARED (TUBE) SECOND END
CONNECTION TYPETHREADED EXTERNAL TUBE THIRD END
VERIFIED SUBSTITUTES & CROSS-REFERENCES 8
J514Interchangeable
interchangeable cross-reference
interchangeable
RASC3300-12Interchangeable
interchangeable cross-reference
interchangeable
12R6BX-SInterchangeable
Same NIIN cross-reference
interchangeable
MIL-DTL-18866Interchangeable
Same NIIN cross-reference
interchangeable
MS51523B12Interchangeable
Same NIIN cross-reference
interchangeable
C5706X12Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is MS51523A12?
MS51523A12 is a ADAPTER,STRAIGHT,TUBE TO BOSS.
What parts can replace MS51523A12?
There are 8 known substitutes for MS51523A12: J514, RASC3300-12, 12R6BX-S and 5 more. Substitute compatibility should be verified for your specific system.
What is the NSN for MS51523A12?
MS51523A12 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-01-104-7503. This indicates validated use in U.S. government and defense supply chains.
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