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519-3-4 — RETAINER,SPRING,UPP

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

519-3-4: RETAINER,SPRING,UPP.

The RETAINER,SPRING,UPP is a the manufacturer industrial component. Key specifications include material: IRON OVERALL, seat_type: GROUND-JOINT, reducer_type: CONCENTRIC, connection_type: THREADED INTERNAL PIPE ALL ENDS, connection_style: PLAIN (PIPE) ALL ENDS, style_designator: SCREWED. This part is cataloged in the U.S.

Government catalog under NSN 4730-00-189-2598, 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
519-3-4
NSN: 4730-00-189-2598
NIINs: 001892598, 006747952, 009612562, 015946896
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 14959 — CRANE CO DIV VALVE DIV (USA)
SPECIFICATIONS
materialIRON OVERALL
seat_typeGROUND-JOINT
reducer_typeCONCENTRIC
connection_typeTHREADED INTERNAL PIPE ALL ENDS
connection_stylePLAIN (PIPE) ALL ENDS
style_designatorSCREWED
operating_pressure300.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
nominal_thread_size0.750 INCHES ALL ENDS IN
coupling_flange_shapeHEXAGON
maximum_operating_temp218.0 CELSIUS SINGLE RESPONSE DEGC
nominal_overall_length2.094 INCHES IN
media_for_which_designedSTEAM SINGLE RESPONSE
NSN4730-00-189-2598
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 519-3-4 · 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
•
CONNECTION STYLE: PLAIN (PIPE) ALL ENDS
•
COUPLING FLANGE SHAPE: HEXAGON
•
NOMINAL OVERALL LENGTH: 2.094 INCHES IN
•
CONNECTION TYPE: THREADED INTERNAL PIPE ALL ENDS
•
STYLE DESIGNATOR: SCREWED
•
MATERIAL DOCUMENT AND CLASSIFICATION: ASTM A197 ASSN STD 1ST MATERIAL RESPONSE OVERALL
•
OPERATING PRESSURE: 300.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
•
SEAT TYPE: GROUND-JOINT
TECHNICAL CHARACTERISTICS
CONNECTION STYLEPLAIN (PIPE) ALL ENDS
COUPLING FLANGE SHAPEHEXAGON
NOMINAL OVERALL LENGTH2.094 INCHES IN
CONNECTION TYPETHREADED INTERNAL PIPE ALL ENDS
STYLE DESIGNATORSCREWED
MATERIAL DOCUMENT AND CLASSIFICATIONASTM A197 ASSN STD 1ST MATERIAL RESPONSE OVERALL
OPERATING PRESSURE300.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
SEAT TYPEGROUND-JOINT
NOMINAL THREAD SIZE0.750 INCHES ALL ENDS IN
MAXIMUM OPERATING TEMP218.0 CELSIUS SINGLE RESPONSE DEGC
SUBSTITUTES & CROSS-REFERENCES 2
MILU18250Reference document
Same NSN cross-reference
Reference document — Secondary reference
B16.39Reference document
Same NSN cross-reference
Reference document — Design control — primary reference
LIFECYCLE
NSN statusCancelled· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 519-3-4?
519-3-4 is a RETAINER,SPRING,UPP.
What parts can replace 519-3-4?
There are 2 known substitutes for 519-3-4: MILU18250, B16.39. Substitute compatibility should be verified for your specific system.
What is the NSN for 519-3-4?
519-3-4 is cataloged in the U.S. Government catalog under NSN 4730-00-189-2598. This indicates validated use in U.S. government and defense supply chains.
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