PartsTable
Technical Data Sheet
MS51511A4 ✓ 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 COMP 12L14 OR STEEL COMP 1010 OVERALL, leg_length: 0.780 INCHES NOMINAL SECOND END IN, seat_angle: 37.0 DEGREES THIRD END, thread_class: 2A THIRD END A, connection_type: THREADED EXTERNAL TUBE THIRD END, connection_style: FLARED (TUBE) THIRD 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 4730-01-064-3448, 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
MS51511A4
NSN: 4730-01-064-3448
FSC: 4730
CAGE: 96906 — MILITARY STANDARDS PROMULGATED BY MILITARY DEPARTMENTS UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M
SPECIFICATIONS
materialSTEEL COMP 12L14 OR STEEL COMP 1010 OVERALL
leg_length0.780 INCHES NOMINAL SECOND END IN
seat_angle37.0 DEGREES THIRD END
thread_class2A THIRD END A
connection_typeTHREADED EXTERNAL TUBE THIRD END
connection_styleFLARED (TUBE) THIRD END
operating_pressure3000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
nominal_thread_size0.438 INCHES FIRST END IN
media_for_which_designedHYDRAULIC FLUID SINGLE RESPONSE
thread_series_designatorUNF FIRST END
nondefinitive_spec/std_data5C FIGURE
specification/standard_data96906-MS51511 GOVERNMENT STANDARD AND 81343-J514 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
NSN4730-01-064-3448
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: MS51511A4 · 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
THREAD CLASS: 2A THIRD END A
LEG LENGTH: 0.780 INCHES NOMINAL SECOND END IN
CONNECTION TYPE: THREADED EXTERNAL TUBE THIRD END
NOMINAL THREAD SIZE: 0.438 INCHES THIRD END IN
TECHNICAL CHARACTERISTICS (FLIS)
THREAD SERIES DESIGNATORUNF FIRST END
THREAD CLASS2A THIRD END A
LEG LENGTH0.780 INCHES NOMINAL SECOND END IN
THREAD CLASS2A FIRST END A
CONNECTION TYPETHREADED EXTERNAL TUBE THIRD END
CONNECTION TYPETHREADED EXTERNAL PIPE SECOND END
LEG LENGTH0.890 INCHES NOMINAL FIRST END IN
NOMINAL THREAD SIZE0.438 INCHES THIRD END IN
NOMINAL THREAD SIZE0.125 INCHES SECOND END IN
NOMINAL OUTSIDE DIAMETER TUBE ACCOMMODATED0.250 INCHES FIRST END IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 22
13216E0019Interchangeable
interchangeable cross-reference
interchangeable
124741-126TYPEKAInterchangeable
interchangeable cross-reference
interchangeable
202842Interchangeable
interchangeable cross-reference
interchangeable
43712Interchangeable
interchangeable cross-reference
interchangeable
674-0117-010Interchangeable
interchangeable cross-reference
interchangeable
E15734AInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is MS51511A4?
MS51511A4 is a ADAPTER,STRAIGHT,TUBE TO BOSS.
What parts can replace MS51511A4?
There are 22 known substitutes for MS51511A4: 13216E0019, 124741-126TYPEKA, 202842 and 19 more. Substitute compatibility should be verified for your specific system.
What is the NSN for MS51511A4?
MS51511A4 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-01-064-3448. This indicates validated use in U.S. government and defense supply chains.
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