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Technical Data Sheet
PartsTable / COMPONENT / H655-1503-F24
H655-1503-F24 ✓ 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: NICKEL ALLOY BODY, valve_size: 0.250 INCHES IN, design_type: STRAIGHT, orifice_diameter: 0.0595 INCHES NOMINAL IN, end_connection_type: ANY ACCEPTABLE LOCATION NOT OTHERWISE SPECIFIED, end_item_identification: R.O. UNIT ST, WSD: LOS ANGELES CLASS SSN (688).

This product is currently in active production with full OEM support. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-01-501-3207, 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
H655-1503-F24
NSN: 4730-01-501-3207
FSC: 4730
CAGE: 53711 — NAVAL SEA SYSTEMS COMMAND (USA)
SPECIFICATIONS
materialNICKEL ALLOY BODY
valve_size0.250 INCHES IN
design_typeSTRAIGHT
orifice_diameter0.0595 INCHES NOMINAL IN
special_featuresCONSIST OF NUT, PC NO. 56A, NICU, QQ-N-281, ORIFICE, PC NO. 11A, NICU, QQ-N-281, AND O-RING, RUBBER, MIL-G-23652, TYPE II; 5100 PSI WP MAX, LENGTH OF ORIFICE ONLY IS 0.250 INCH. A
end_connection_typeANY ACCEPTABLE LOCATION NOT OTHERWISE SPECIFIED
end_item_identificationR.O. UNIT ST, WSD: LOS ANGELES CLASS SSN (688)
end_connection_similarityIDENTICAL
part_name_assigned_by_controlling_agencyORIFICE FTG & SND ATTENUATOR
NSN4730-01-501-3207
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: H655-1503-F24 · 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
•
ORIFICE DIAMETER: 0.0595 INCHES NOMINAL IN
•
DESIGN TYPE: STRAIGHT
•
END CONNECTION SIMILARITY: IDENTICAL
•
END CONNECTION TYPE: ANY ACCEPTABLE LOCATION NOT OTHERWISE SPECIFIED
•
MATERIAL: NICKEL ALLOY BODY
•
VALVE SIZE: 0.250 INCHES IN
TECHNICAL CHARACTERISTICS (FLIS)
END ITEM IDENTIFICATIONR.O. UNIT ST, WSD: LOS ANGELES CLASS SSN (688)
ORIFICE DIAMETER0.0595 INCHES NOMINAL IN
DESIGN TYPESTRAIGHT
END CONNECTION SIMILARITYIDENTICAL
END CONNECTION TYPEANY ACCEPTABLE LOCATION NOT OTHERWISE SPECIFIED
MATERIALNICKEL ALLOY BODY
VALVE SIZE0.250 INCHES IN
SPECIAL FEATURESCONSIST OF NUT, PC NO. 56A, NICU, QQ-N-281, ORIFICE, PC NO. 11A, NICU, QQ-N-281, AND O-RING, RUBBER, MIL-G-23652, TYPE II; 5100 PSI WP MAX, LENGTH OF ORIFICE ONLY IS 0.250 INCH. A
PART NAME ASSIGNED BY CONTROLLING AGENCYORIFICE FTG & SND ATTENUATOR
VERIFIED SUBSTITUTES & CROSS-REFERENCES 5
375-190093-20Interchangeable
interchangeable cross-reference
interchangeable
H655-1503Interchangeable
interchangeable cross-reference
interchangeable
6985695Interchangeable
interchangeable cross-reference
interchangeable
531-6985695-F23Interchangeable
interchangeable cross-reference
interchangeable
2621-561-02Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is H655-1503-F24?
H655-1503-F24 is a RESTRICTOR UNIT,FLUID FLOW.
What parts can replace H655-1503-F24?
There are 5 known substitutes for H655-1503-F24: 375-190093-20, H655-1503, 6985695 and 2 more. Substitute compatibility should be verified for your specific system.
What is the NSN for H655-1503-F24?
H655-1503-F24 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-01-501-3207. 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