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Technical Data Sheet
PartsTable / COMPONENT / 4R145-2
4R145-2 ✓ 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 RESTRICTOR UNIT,FLUID FLOW is a the manufacturer industrial component. Key specifications include material: STEEL CORROSION RESISTING SCREENING, design_type: STRAIGHT, pressure_rating: 3000.0 POUNDS PER SQUARE INCH (PSI) NOMINAL LBS, surface_treatment: PASSIVATE BODY, strainer_type_and_quantity: 2 SCREEN, material_document_and_classification: AMS 5643, 17-4PH ASSN STD SINGLE MATERIAL RESPONSE BODY. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-01-009-6329, 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
4R145-2
NSN: 4730-01-009-6329
FSC: 4730
CAGE: 82829 — ALLEN AIRCRAFT PRODUCTS INC (USA)
SPECIFICATIONS
materialSTEEL CORROSION RESISTING SCREENING
design_typeSTRAIGHT
pressure_rating3000.0 POUNDS PER SQUARE INCH (PSI) NOMINAL LBS
surface_treatmentPASSIVATE BODY
strainer_type_and_quantity2 SCREEN
material_document_and_classificationAMS 5643, 17-4PH ASSN STD SINGLE MATERIAL RESPONSE BODY
surface_treatment_document_and_classificationQQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE BODY
NSN4730-01-009-6329
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 4R145-2 · 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
•
DESIGN TYPE: STRAIGHT
•
PRESSURE RATING: 3000.0 POUNDS PER SQUARE INCH (PSI) NOMINAL LBS
•
STRAINER TYPE AND QUANTITY: 2 SCREEN
•
MATERIAL DOCUMENT AND CLASSIFICATION: AMS 5643, 17-4PH ASSN STD SINGLE MATERIAL RESPONSE BODY
•
MATERIAL: STEEL CORROSION RESISTING SCREENING
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE BODY
•
SURFACE TREATMENT: PASSIVATE BODY
TECHNICAL CHARACTERISTICS (FLIS)
DESIGN TYPESTRAIGHT
PRESSURE RATING3000.0 POUNDS PER SQUARE INCH (PSI) NOMINAL LBS
STRAINER TYPE AND QUANTITY2 SCREEN
MATERIAL DOCUMENT AND CLASSIFICATIONAMS 5643, 17-4PH ASSN STD SINGLE MATERIAL RESPONSE BODY
MATERIALSTEEL CORROSION RESISTING SCREENING
MATERIALSTEEL COMP 630 BODY
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE BODY
SURFACE TREATMENTPASSIVATE BODY
VERIFIED SUBSTITUTES & CROSS-REFERENCES 8
SCD1585Interchangeable
interchangeable cross-reference
interchangeable
JK43Interchangeable
interchangeable cross-reference
interchangeable
56202Interchangeable
interchangeable cross-reference
interchangeable
41A6906Interchangeable
interchangeable cross-reference
interchangeable
490576Interchangeable
interchangeable cross-reference
interchangeable
4R145-1Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 4R145-2?
4R145-2 is a RESTRICTOR UNIT,FLUID FLOW.
What parts can replace 4R145-2?
There are 8 known substitutes for 4R145-2: SCD1585, JK43, 56202 and 5 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 4R145-2?
4R145-2 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-01-009-6329. 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: July 2026