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Technical Data Sheet
PartsTable / COMPONENT / MS51815-3
MS51815-3 ✓ 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 CORROSION RESISTING OVERALL, flow_angle: 45.0 DEGREES, leg_length: 1.220 INCHES MINIMUM AND 1.280 INCHES MAXIMUM FIRST END IN, seat_angle: 12.0 DEGREES FIRST END, thread_class: 2A FIRST END A, connection_type: THREADED EXTERNAL PIPE SECOND END. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-096-8756, 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
MS51815-3
NSN: 4730-00-096-8756
FSC: 4730
CAGE: 98441 — PARKER HANNIFIN CORP DBA PNEUTRONICS DIV STRATOFLEX PRODUCTS DIVISION (USA)
SPECIFICATIONS
materialSTEEL CORROSION RESISTING OVERALL
flow_angle45.0 DEGREES
leg_length1.220 INCHES MINIMUM AND 1.280 INCHES MAXIMUM FIRST END IN
seat_angle12.0 DEGREES FIRST END
thread_class2A FIRST END A
connection_typeTHREADED EXTERNAL PIPE SECOND END
connection_styleFLARELESS (TUBE) FIRST END
style_designatorELBOW
surface_treatmentPASSIVATE OVERALL
operating_pressure3000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
nominal_thread_size0.500 INCHES FIRST END IN
maximum_operating_temp250.0 FAHRENHEIT SINGLE RESPONSE DEGF
NSN4730-00-096-8756
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: MS51815-3 · 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
VERIFIED SUBSTITUTES & CROSS-REFERENCES 20
217660Interchangeable
interchangeable cross-reference
interchangeable
H8031Interchangeable
interchangeable cross-reference
interchangeable
4B8317Interchangeable
interchangeable cross-reference
interchangeable
D74054Interchangeable
interchangeable cross-reference
interchangeable
236632Interchangeable
interchangeable cross-reference
interchangeable
CVCPICInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is MS51815-3?
MS51815-3 is a ADAPTER,STRAIGHT,TUBE TO BOSS.
What parts can replace MS51815-3?
There are 20 known substitutes for MS51815-3: 217660, H8031, 4B8317 and 17 more. Substitute compatibility should be verified for your specific system.
Is MS51815-3 still available?
MS51815-3 is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026