PartsTable
Technical Data Sheet
PartsTable / COMPONENT / MS51819-33
MS51819-33 ✓ 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,PIPE TO TUBE is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, seat_angle: 12.0 DEGREES FIRST END, thread_class: 2A FIRST END A, connection_style: FLARELESS (TUBE) FIRST END, operating_pressure: 3000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS, nominal_thread_size: 0.438 INCHES FIRST END IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-003-5919, 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
MS51819-33
NSN: 4730-00-003-5919
FSC: 4730
CAGE: 96906 — MILITARY STANDARDS PROMULGATED BY MILITARY DEPARTMENTS UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M
SPECIFICATIONS
materialSTEEL OVERALL
seat_angle12.0 DEGREES FIRST END
thread_class2A FIRST END A
connection_styleFLARELESS (TUBE) FIRST END
operating_pressure3000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
nominal_thread_size0.438 INCHES FIRST END IN
maximum_operating_temp275.0 FAHRENHEIT SINGLE RESPONSE DEGF
nominal_overall_length1.120 INCHES IN
end_item_identificationGRUMMAN AIRCRAFT F18
thread_series_designatorUNF FIRST END
nondefinitive_spec/std_data19A FIGURE A
specification/standard_data96906-MS51819 GOVERNMENT STANDARD AND 81343-J514 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
NSN4730-00-003-5919
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: MS51819-33 · 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
•
NOMINAL THREAD SIZE: 0.125 INCHES SECOND END IN
•
THREAD SERIES DESIGNATOR: UNF FIRST END
•
OPERATING PRESSURE: 3000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
•
MATERIAL: STEEL OVERALL
•
NOMINAL OUTSIDE DIAMETER TUBE ACCOMMODATED: 0.250 INCHES FIRST END IN
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: J514 ASSN STD SINGLE TREATMENT RESPONSE AND QQ-P-416, TY 2, CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
TECHNICAL CHARACTERISTICS (FLIS)
NOMINAL THREAD SIZE0.125 INCHES SECOND END IN
NOMINAL THREAD SIZE0.438 INCHES FIRST END IN
THREAD SERIES DESIGNATORUNF FIRST END
OPERATING PRESSURE3000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
MATERIALSTEEL OVERALL
NOMINAL OUTSIDE DIAMETER TUBE ACCOMMODATED0.250 INCHES FIRST END IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONJ514 ASSN STD SINGLE TREATMENT RESPONSE AND QQ-P-416, TY 2, CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
THREAD SERIES DESIGNATORNPTF SECOND END
NONDEFINITIVE SPEC/STD DATA19A FIGURE A
SEAT ANGLE12.0 DEGREES FIRST END
VERIFIED SUBSTITUTES & CROSS-REFERENCES 24
202774Interchangeable
interchangeable cross-reference
interchangeable
74145NInterchangeable
interchangeable cross-reference
interchangeable
24100220AInterchangeable
interchangeable cross-reference
interchangeable
DM74145NInterchangeable
interchangeable cross-reference
interchangeable
8330888Interchangeable
interchangeable cross-reference
interchangeable
P413Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
Ready to buy MS51819-33?
Compare prices from verified sellers on eBay
Buy on eBay →
As an eBay Partner, PartsTable may earn a commission. Your price is not affected.
FREQUENTLY ASKED QUESTIONS
What is MS51819-33?
MS51819-33 is a ADAPTER,STRAIGHT,PIPE TO TUBE.
What parts can replace MS51819-33?
There are 24 known substitutes for MS51819-33: 202774, 74145N, 24100220A and 21 more. Substitute compatibility should be verified for your specific system.
Is MS51819-33 still available?
MS51819-33 is currently cancelled.
Community Feedback
Comments (0)
No comments yet. Be the first to share what you know.
Leave a Comment
Comments are reviewed before appearing. You will receive an email to verify before your comment appears.

Request a Quote — MS51819-33

✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026