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PartsTable / COMPONENT / 21317-1018
21317-1018 ✓ 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 length: 0.312 INCHES NOMINAL IN, material: STEEL CORROSION RESISTING, design_type: TUBULAR, thread_class: 3A LOCATION NOT OTHERWISE SPECIFIED A, thread_series: UNF LOCATION NOT OTHERWISE SPECIFIED, orifice_diameter: 0.0550 INCHES NOMINAL IN. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-01-478-7187, 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
21317-1018
NSN: 4730-01-478-7187
FSC: 4730
CAGE: 78062 — SARGENT AEROSPACE & DEFENSE, LLC DBA SARGENT CONTROLS & AEROSPACE DIV SARGENT CONTROLS & AEROSPACE (USA)
SPECIFICATIONS
length0.312 INCHES NOMINAL IN
materialSTEEL CORROSION RESISTING
design_typeTUBULAR
thread_class3A LOCATION NOT OTHERWISE SPECIFIED A
thread_seriesUNF LOCATION NOT OTHERWISE SPECIFIED
orifice_diameter0.0550 INCHES NOMINAL IN
special_featuresALTERED FROM MS51023-62 CAGE 96906
thread_directionRIGHT-HAND LOCATION NOT OTHERWISE SPECIFIED
thread_provisionTHREADED LOCATION NOT OTHERWISE SPECIFIED
surface_treatmentPASSIVATE
thread_size_designator1/4-28 LOCATION NOT OTHERWISE SPECIFIED
end_item_identificationVALVE ASSEMBLY P/N 21340-001
NSN4730-01-478-7187
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 21317-1018 · 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
•
SURFACE TREATMENT: PASSIVATE
•
THREAD DIRECTION: RIGHT-HAND LOCATION NOT OTHERWISE SPECIFIED
•
LENGTH: 0.312 INCHES NOMINAL IN
•
ORIFICE DIAMETER: 0.0250 INCHES NOMINAL IN
•
THREAD CLASS: 3A LOCATION NOT OTHERWISE SPECIFIED A
•
DESIGN TYPE: TUBULAR
•
THREAD PROVISION: THREADED LOCATION NOT OTHERWISE SPECIFIED
TECHNICAL CHARACTERISTICS (FLIS)
SURFACE TREATMENTPASSIVATE
THREAD DIRECTIONRIGHT-HAND LOCATION NOT OTHERWISE SPECIFIED
LENGTH0.312 INCHES NOMINAL IN
ORIFICE DIAMETER0.0250 INCHES NOMINAL IN
THREAD CLASS3A LOCATION NOT OTHERWISE SPECIFIED A
DESIGN TYPETUBULAR
THREAD PROVISIONTHREADED LOCATION NOT OTHERWISE SPECIFIED
END ITEM IDENTIFICATIONVALVE ASSEMBLY P/N 21340-001
THREAD SIZE DESIGNATOR1/4-28 LOCATION NOT OTHERWISE SPECIFIED
SPECIAL FEATURESALTERED FROM MS51023-62 CAGE 96906
VERIFIED SUBSTITUTES & CROSS-REFERENCES 21
AND10133-1601/ASTM B221-T6511Interchangeable
interchangeable cross-reference
interchangeable
AMS4154Interchangeable
interchangeable cross-reference
interchangeable
QQ-A-200/11Interchangeable
interchangeable cross-reference
interchangeable
13-926ID1Interchangeable
interchangeable cross-reference
interchangeable
213-40Interchangeable
interchangeable cross-reference
interchangeable
A113-962Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 21317-1018?
21317-1018 is a RESTRICTOR,FLUID FLOW.
What parts can replace 21317-1018?
There are 21 known substitutes for 21317-1018: AND10133-1601/ASTM B221-T6511, AMS4154, QQ-A-200/11 and 18 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 21317-1018?
21317-1018 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-01-478-7187. 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