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56447-4 ✓ 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 diameter: 0.984 INCHES NOMINAL IN, material: STEEL CORROSION RESISTING FILTER, valve_size: 1.000 INCHES IN, design_type: STRAIGHT, thread_class: 3B LOCATION NOT OTHERWISE SPECIFIED, thread_series: UNF LOCATION NOT OTHERWISE SPECIFIED. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-546-1766, 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
56447-4
NSN: 4730-00-546-1766
FSC: 4730
CAGE: 05228 — PTI TECHNOLOGIES INC. (USA)
SPECIFICATIONS
diameter0.984 INCHES NOMINAL IN
materialSTEEL CORROSION RESISTING FILTER
valve_size1.000 INCHES IN
design_typeSTRAIGHT
thread_class3B LOCATION NOT OTHERWISE SPECIFIED
thread_seriesUNF LOCATION NOT OTHERWISE SPECIFIED
overall_length3.281 INCHES MINIMUM AND 3.344 INCHES MAXIMUM IN
pressure_rating3000.0 POUNDS PER SQUARE INCH (PSI) NOMINAL LBS
orifice_diameter0.023 INCHES NOMINAL IN
special_featuresW/FOUR SAFETY WIRE HOLES
thread_directionRIGHT-HAND LOCATION NOT OTHERWISE SPECIFIED
width_across_flats1.000 INCHES NOMINAL IN
NSN4730-00-546-1766
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 56447-4 · 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
•
END CONNECTION COMPONENT TYPE AND SIZE FOR WHICH DESIGNED: 3/8 IN. OD TUBE IN
•
FLOW RATE AND FLUID TYPE: 0.7 GALLONS PER MINUTE OIL
•
MATERIAL: STEEL CORROSION RESISTING FILTER
•
THREAD SERIES: UNF LOCATION NOT OTHERWISE SPECIFIED
•
VALVE SIZE: 1.000 INCHES IN
•
STRAINER TYPE AND QUANTITY: 2 FILTER
•
DESIGN TYPE: STRAIGHT
TECHNICAL CHARACTERISTICS (FLIS)
END CONNECTION COMPONENT TYPE AND SIZE FOR WHICH DESIGNED3/8 IN. OD TUBE IN
FLOW RATE AND FLUID TYPE0.7 GALLONS PER MINUTE OIL
MATERIALSTEEL CORROSION RESISTING FILTER
SPECIAL FEATURESW/FOUR SAFETY WIRE HOLES
THREAD SERIESUNF LOCATION NOT OTHERWISE SPECIFIED
VALVE SIZE1.000 INCHES IN
STRAINER TYPE AND QUANTITY2 FILTER
DESIGN TYPESTRAIGHT
END ITEM IDENTIFICATIONKC-135 AIRCRAFT
PRESSURE RATING3000.0 POUNDS PER SQUARE INCH (PSI) NOMINAL LBS
VERIFIED SUBSTITUTES & CROSS-REFERENCES 3
102465Interchangeable
interchangeable cross-reference
interchangeable
102 65Interchangeable
interchangeable cross-reference
interchangeable
6F2002Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 56447-4?
56447-4 is a RESTRICTOR UNIT,FLUID FLOW.
What parts can replace 56447-4?
There are 3 known substitutes for 56447-4: 102465, 102 65, 6F2002. Substitute compatibility should be verified for your specific system.
What is the NSN for 56447-4?
56447-4 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-546-1766. 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