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40921-29 ✓ 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 CAP,QUICK DISCONNECT is a the manufacturer industrial component. Key specifications include end_item_identification: MOBILE ARRESTING GEAR SYSTEM, part_name_assigned_by_controlling_agency: DUST CAP, SOCKET, SDC-3-HK. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-01-682-2338, 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
40921-29
NSN: 4730-01-682-2338
FSC: 4730
CAGE: 21439 — CURTISS-WRIGHT FLOW CONTROL SERVICE, LLC DBA ENGINEERED ARRESTING SYSTEMS - ESCO DIV CW FLOW CONTROL SVC LLC DBA (USA)
SPECIFICATIONS
end_item_identificationMOBILE ARRESTING GEAR SYSTEM
part_name_assigned_by_controlling_agencyDUST CAP, SOCKET, SDC-3-HK
NSN4730-01-682-2338
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 40921-29 · 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
TECHNICAL CHARACTERISTICS (FLIS)
END ITEM IDENTIFICATIONMOBILE ARRESTING GEAR SYSTEM
PART NAME ASSIGNED BY CONTROLLING AGENCYDUST CAP, SOCKET, SDC-3-HK
VERIFIED SUBSTITUTES & CROSS-REFERENCES 3
700-0143-1Interchangeable
interchangeable cross-reference
interchangeable
RS931-3AInterchangeable
interchangeable cross-reference
interchangeable
50158Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 40921-29?
40921-29 is a CAP,QUICK DISCONNECT.
What parts can replace 40921-29?
There are 3 known substitutes for 40921-29: 700-0143-1, RS931-3A, 50158. Substitute compatibility should be verified for your specific system.
What is the NSN for 40921-29?
40921-29 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-01-682-2338. 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