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521685-2 — CONNECTOR,RECEPTACLE,ELECTRICAL

✓ Government record, cited
— · PIPE SECTION
PRODUCT OVERVIEW

521685-2: CONNECTOR,RECEPTACLE,ELECTRICAL.

CONNECTOR,RECEPTACLE,ELECTRICAL. This part is cataloged in the U.S. Government catalog under NSN 4720-00-611-5651, 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
521685-2
NSN: 4720-00-611-5651
NIINs: 006115651, 013348587
FSC: 4720 — Hose and Flexible Tubing
CAGE: 40152 — VME AMERICAS INC SUB OF VME GROUP N V (USA)
SPECIFICATIONS
Part Number521685-2
NSN4720-00-611-5651
COMPONENT DIAGRAM
PIPE SECTION — SCHEDULE = WALL THICKNESS WALL: — OD: — LENGTH: — — — PN: 521685-2 · OEM ⚠ VERIFY BEFORE ORDERING Schedule = wall thickness, NOT pipe diameter. Sch 40 and Sch 80 have the same OD but different wall thickness. Nominal pipe size ≠ actual OD — a 1" pipe is actually 1.315" OD ✓ BROKER TIP Sch 40 = standard wall, Sch 80 = heavy wall (higher pressure), Sch 160 = extra heavy. Seamless pipe is required for high-pressure applications — welded pipe has lower ratings PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
SUBSTITUTES & CROSS-REFERENCES 2
HCF2905Reference document
Same NSN cross-reference
Reference document — Secondary reference
42516U-116766-03950Reference document
Same NSN cross-reference
Reference document — Design control — primary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 521685-2?
521685-2 is a CONNECTOR,RECEPTACLE,ELECTRICAL.
What parts can replace 521685-2?
There are 2 known substitutes for 521685-2: HCF2905, 42516U-116766-03950. Substitute compatibility should be verified for your specific system.
What is the NSN for 521685-2?
521685-2 is cataloged in the U.S. Government catalog under NSN 4720-00-611-5651. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.