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6521-80-500-2101 — HINGE,BUTT

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

6521-80-500-2101: HINGE,BUTT.

The HINGE,BUTT is a the manufacturer industrial component. Key specifications include material: UNABLE TO DECODE, knuckle_type: FRICTION, pin_diameter: 0.121 INCHES MINIMUM AND 0.126 INCHES MAXIMUM IN, overall_length: 13.575 INCHES NOMINAL IN, knuckle_quantity: 14, pin_removability: NONREMOVABLE. This part is cataloged in the U.S.

Government catalog under NSN 5340-01-305-2725, 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
6521-80-500-2101
NSN: 5340-01-305-2725
FSC: 5340 — Hardware, Commercial
CAGE: 78286 — SIKORSKY AIRCRAFT CORPORATION DBA SIKORSKY AIRCRAFT CORP (USA)
SPECIFICATIONS
materialUNABLE TO DECODE
knuckle_typeFRICTION
pin_diameter0.121 INCHES MINIMUM AND 0.126 INCHES MAXIMUM IN
overall_length13.575 INCHES NOMINAL IN
knuckle_quantity14
pin_removabilityNONREMOVABLE
reversible_featureNOT INCLUDED
hinge_mounting_typeFULL MORTISE
NSN5340-01-305-2725
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 6521-80-500-2101 MFR: OEM ⚠ VERIFY BEFORE ORDERING Wrong material = failure. Viton for oil/fuel, EPDM for water/steam, Buna-N for general purpose, Silicone for food-grade. Chemical incompatibility causes swelling, brittleness, or rapid degradation ✓ BROKER TIP Durometer (hardness) affects sealing pressure tolerance. Higher Shore A = harder = higher pressure. Standard durometer is 70A — verify if application requires different hardness PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
PIN DIAMETER: 0.121 INCHES MINIMUM AND 0.126 INCHES MAXIMUM IN
•
REVERSIBLE FEATURE: NOT INCLUDED
•
HINGE MOUNTING TYPE: FULL MORTISE
•
PIN REMOVABILITY: NONREMOVABLE
•
KNUCKLE QUANTITY: 14
•
MATERIAL: UNABLE TO DECODE
•
KNUCKLE TYPE: FRICTION
TECHNICAL CHARACTERISTICS
PIN DIAMETER0.121 INCHES MINIMUM AND 0.126 INCHES MAXIMUM IN
REVERSIBLE FEATURENOT INCLUDED
OVERALL LENGTH13.575 INCHES NOMINAL IN
HINGE MOUNTING TYPEFULL MORTISE
PIN REMOVABILITYNONREMOVABLE
KNUCKLE QUANTITY14
MATERIALUNABLE TO DECODE
KNUCKLE TYPEFRICTION
OTHER ITEMS IN FSC 5340 — Hardware, Commercial
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5340-00-000-0068 5340-00-000-0132 5340-00-000-8150 5340-00-001-1251 5340-00-001-1264 5340-00-001-1265 5340-00-001-1266 5340-00-001-1275
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 6521-80-500-2101?
6521-80-500-2101 is a HINGE,BUTT.
What is the NSN for 6521-80-500-2101?
6521-80-500-2101 is cataloged in the U.S. Government catalog under NSN 5340-01-305-2725. 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.