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5711-1/4IN — Technical Data Sheet

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— · 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 UNION,PIPE is a the manufacturer industrial component. Key specifications include material: IRON OR IRON ALLOY BODY, seat_type: GROUND-JOINTGROUND-JOINT, connection_type: THREADED INTERNAL PIPE ALL ENDSTHREADED INTERNAL PIPE ALL ENDS, connection_style: PLAIN (PIPE) ALL ENDSPLAIN (PIPE) ALL ENDS, style_designator: THREADED, surface_treatment: ZINC SEAT. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-476-6444, 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
5711-1/4IN
NSN: 4730-00-476-6444
FSC: 4730
CAGE: 80996 — ITT GRINNELL CORP (USA)
SPECIFICATIONS
materialIRON OR IRON ALLOY BODY
seat_typeGROUND-JOINTGROUND-JOINT
connection_typeTHREADED INTERNAL PIPE ALL ENDSTHREADED INTERNAL PIPE ALL ENDS
connection_stylePLAIN (PIPE) ALL ENDSPLAIN (PIPE) ALL ENDS
style_designatorTHREADED
surface_treatmentZINC SEAT
operating_pressure300.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM FIRST RESPONSE LBS
nominal_thread_size1.250 INCHES ALL ENDS1.250 INCHES ALL ENDS IN
maximum_operating_temp500.0 FAHRENHEIT SINGLE RESPONSE500.0 FAHRENHEIT SINGLE RESPONSE DEGF
nominal_overall_length2.810 INCHES IN
media_for_which_designedWATER-OIL-GAS SECOND RESPONSE
thread_series_designatorNPT ALL ENDS
NSN4730-00-476-6444
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 5711-1/4IN · 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
•
OPERATING PRESSURE: 300.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM FIRST RESPONSE LBS
•
MEDIA FOR WHICH DESIGNED: STEAM FIRST RESPONSE
•
MATERIAL: IRON OR IRON ALLOY BODY
•
SURFACE TREATMENT: ZINC SEAT
•
CONNECTION TYPE: THREADED INTERNAL PIPE ALL ENDSTHREADED INTERNAL PIPE ALL ENDS
•
MATERIAL DOCUMENT AND CLASSIFICATION: ASTM A197 ASSN STD SINGLE MATERIAL RESPONSE BODY
TECHNICAL CHARACTERISTICS (FLIS)
OPERATING PRESSURE300.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM FIRST RESPONSE LBS
MEDIA FOR WHICH DESIGNEDSTEAM FIRST RESPONSE
MEDIA FOR WHICH DESIGNEDWATER-OIL-GAS SECOND RESPONSE
MATERIALIRON OR IRON ALLOY BODY
SURFACE TREATMENTZINC SEAT
MATERIALCOPPER ALLOY OR IRON SEAT
CONNECTION TYPETHREADED INTERNAL PIPE ALL ENDSTHREADED INTERNAL PIPE ALL ENDS
MATERIAL DOCUMENT AND CLASSIFICATIONASTM A197 ASSN STD SINGLE MATERIAL RESPONSE BODY
MAXIMUM OPERATING TEMP500.0 FAHRENHEIT SINGLE RESPONSE500.0 FAHRENHEIT SINGLE RESPONSE DEGF
NOMINAL OVERALL LENGTH2.810 INCHES IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 18
7685Interchangeable
interchangeable cross-reference
interchangeable
T0V10N0125SETF0R72VInterchangeable
interchangeable cross-reference
interchangeable
GS4843Interchangeable
interchangeable cross-reference
interchangeable
MILU18250Interchangeable
interchangeable cross-reference
interchangeable
519-3-4Interchangeable
interchangeable cross-reference
interchangeable
B16.39Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 5711-1/4IN?
5711-1/4IN is a UNION,PIPE.
What parts can replace 5711-1/4IN?
There are 18 known substitutes for 5711-1/4IN: 7685, T0V10N0125SETF0R72V, GS4843 and 15 more. Substitute compatibility should be verified for your specific system.
Is 5711-1/4IN still available?
5711-1/4IN 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: September 2026