PartsTable
Technical Data Sheet
531-6985694 ✓ 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,FLUID FLOW is a the manufacturer industrial component. Key specifications include shape: ROUND, material: NICKEL ALLOY AND COPPER ALLOY SOCKET, flow_angle: 90.0 DEGREES, seat_angle: 37.0 DEGREES FIRST END, design_type: STRAIGHT, temp_rating: -40.0 FAHRENHEIT AND 200.0 FAHRENHEIT SINGLE RESPONSE DEGF. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-01-501-5017, 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
531-6985694
NSN: 4730-01-501-5017
FSC: 4730
CAGE: 53711 — NAVAL SEA SYSTEMS COMMAND (USA)
SPECIFICATIONS
shapeROUND
materialNICKEL ALLOY AND COPPER ALLOY SOCKET
flow_angle90.0 DEGREES
seat_angle37.0 DEGREES FIRST END
design_typeSTRAIGHT
temp_rating-40.0 FAHRENHEIT AND 200.0 FAHRENHEIT SINGLE RESPONSE DEGF
connection_typeTHREADED INTERNAL TUBE FIRST END
inside_diameter1.539 INCHES MAXIMUM IN
connection_styleSWIVEL NUT, FLARE (TUBE) STYLE 3 OPTIONAL END FIRST END
orifice_diameter0.1015 INCHES NOMINAL IN
outside_diameter1.500 INCHES NOMINAL IN
special_featuresWORKING PRESSURE 5100 PSI; ASSEMBLY INCLUDES NUT, NICU, QQ-N-281, PC NO.56A, 1PC.; ORIFICE, NICU, QQ-N-281, PC NO. 11A, 1PC.; O-RING, RUBBER, MIL-G-23652 TYPE II 1PC.; 0.250 IPS A
NSN4730-01-501-5017
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 531-6985694 · 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
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-N-281 FED SPEC SINGLE MATERIAL RESPONSE
INSIDE DIAMETER: 0.1910 INCHES NOMINAL IN
NOMINAL OVERALL THICKNESS: 0.190 INCHES IN
OUTSIDE DIAMETER: 2.560 INCHES NOMINAL IN
MATERIAL: COPPER ALLOY
SHAPE: ROUND
TECHNICAL CHARACTERISTICS (FLIS)
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-N-281 FED SPEC SINGLE MATERIAL RESPONSE
INSIDE DIAMETER0.1910 INCHES NOMINAL IN
SPECIAL FEATURESMATERIAL INCLUDES NICKEL; 1.000 NSP; DRILL ORIFICE TO 0.1910 IN. DIAMETER; FLANGE FACE SHALL HAVE A FINISH WITH A CIRCULAR LAY; MAXIMUM WP, 150 PSI; FITTING TO BE USED ON INBOARD CONNECTION OF BACKUP VALVE IN
NOMINAL OVERALL THICKNESS0.190 INCHES IN
OUTSIDE DIAMETER2.560 INCHES NOMINAL IN
MATERIALCOPPER ALLOY
END ITEM IDENTIFICATIONPIPING 4000 GPD SEAWATER-BRINE-PERM PORT; USE LOS ANGELES CLASS SSN 688
SHAPEROUND
VERIFIED SUBSTITUTES & CROSS-REFERENCES 28
H655-1502-F24Interchangeable
interchangeable cross-reference
interchangeable
2621-561-02Interchangeable
interchangeable cross-reference
interchangeable
531-6985694-F24Interchangeable
interchangeable cross-reference
interchangeable
531-6985694-F23Interchangeable
interchangeable cross-reference
interchangeable
H655-1502-F23Interchangeable
interchangeable cross-reference
interchangeable
531-6985694Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 531-6985694?
531-6985694 is a RESTRICTOR,FLUID FLOW.
What parts can replace 531-6985694?
There are 28 known substitutes for 531-6985694: H655-1502-F24, 2621-561-02, 531-6985694-F24 and 25 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 531-6985694?
531-6985694 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-01-501-5017. This indicates validated use in U.S. government and defense supply chains.
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