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J423 3-4IN — 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 RESTRICTOR UNIT,FLUID FLOW is a the manufacturer industrial component. Key specifications include material: STEEL CORROSION RESISTING WORKING PARTS, body_design: STRAIGHT HORIZONTAL PATTERN, design_type: OPEN BUCKET, INVERTED BUCKET OR BALL FLOAT, nondefinitive_spec/std_data: 1 TYPE AND A CLASS, maximum_steam_working_pressure: ERR-060. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System under NSN 4730-00-223-8040, 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
J423 3-4IN
NSN: 4730-00-223-8040
FSC: 4730
CAGE: 53059 — SPIRAX SARCO INC DBA SPIRAX SARCO (USA)
SPECIFICATIONS
materialSTEEL CORROSION RESISTING WORKING PARTS
body_designSTRAIGHT HORIZONTAL PATTERN
design_typeOPEN BUCKET, INVERTED BUCKET OR BALL FLOAT
nondefinitive_spec/std_data1 TYPE AND A CLASS
maximum_steam_working_pressureERR-060
NSN4730-00-223-8040
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: J423 3-4IN · 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
•
BODY DESIGN: STRAIGHT HORIZONTAL PATTERN
•
MAXIMUM STEAM WORKING PRESSURE: ERR-060
•
DESIGN TYPE: OPEN BUCKET, INVERTED BUCKET OR BALL FLOAT
•
MATERIAL: STEEL BODY
•
NONDEFINITIVE SPEC/STD DATA: 1 TYPE AND A CLASS
TECHNICAL CHARACTERISTICS
BODY DESIGNSTRAIGHT HORIZONTAL PATTERN
MAXIMUM STEAM WORKING PRESSUREERR-060
DESIGN TYPEOPEN BUCKET, INVERTED BUCKET OR BALL FLOAT
MATERIALSTEEL BODY
NONDEFINITIVE SPEC/STD DATA1 TYPE AND A CLASS
MATERIALSTEEL CORROSION RESISTING WORKING PARTS
VERIFIED SUBSTITUTES & CROSS-REFERENCES 14
043 1-2IMInterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
43-44InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
MIL-T-960InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
000-75-044CG15BInterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
MS18301-04AND-10InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
J464TDN1-2INInterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVEGOVERNMENT REGISTRY
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is J423 3-4IN?
J423 3-4IN is a RESTRICTOR UNIT,FLUID FLOW.
What parts can replace J423 3-4IN?
There are 14 known substitutes for J423 3-4IN: 043 1-2IM, 43-44, MIL-T-960 and 11 more. Substitute compatibility should be verified for your specific system.
What is the NSN for J423 3-4IN?
J423 3-4IN is cataloged in the Federal Logistics Information System under NSN 4730-00-223-8040. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: October 2026