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6521-70-905-8116 — LEAF,BUTT HINGE

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

6521-70-905-8116: LEAF,BUTT HINGE.

The LEAF,BUTT HINGE is a the manufacturer industrial component. Key specifications include material: ALUMINUM ALLOY 2024 OVERALL, hinge_pin: INCLUDED, knuckle_type: FRICTION, overall_length: 3.000 INCHES NOMINAL IN, performance_type: MEDIUM DUTY, style_designator: BUTT STAGGERED HOLES. This part is cataloged in the U.S.

Government catalog under NSN 5340-01-144-4302, 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
6521-70-905-8116
NSN: 5340-01-144-4302
FSC: 5340 — Hardware, Commercial
CAGE: 78286 — SIKORSKY AIRCRAFT CORPORATION DBA SIKORSKY AIRCRAFT CORP (USA)
SPECIFICATIONS
materialALUMINUM ALLOY 2024 OVERALL
hinge_pinINCLUDED
knuckle_typeFRICTION
overall_length3.000 INCHES NOMINAL IN
knuckle_quantity3
performance_typeMEDIUM DUTY
style_designatorBUTT STAGGERED HOLES
surface_treatmentANODIZE OVERALL
material_thickness0.103 INCHES MINIMUM AND 0.115 INCHES MAXIMUM IN
reversible_featureNOT INCLUDED
mounting_hole_quantity5
knuckle_inside_diameter0.304 INCHES MINIMUM AND 0.320 INCHES MAXIMUM IN
NSN5340-01-144-4302
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 6521-70-905-8116 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
•
MOUNTING HOLE QUANTITY: 5
•
REVERSIBLE FEATURE: NOT INCLUDED
•
KNUCKLE INSIDE DIAMETER: 0.304 INCHES MINIMUM AND 0.320 INCHES MAXIMUM IN
•
STYLE DESIGNATOR: BUTT STAGGERED HOLES
•
HINGE PIN: INCLUDED
•
MATERIAL THICKNESS: 0.103 INCHES MINIMUM AND 0.115 INCHES MAXIMUM IN
•
KNUCKLE QUANTITY: 3
TECHNICAL CHARACTERISTICS
MOUNTING HOLE QUANTITY5
REVERSIBLE FEATURENOT INCLUDED
KNUCKLE INSIDE DIAMETER0.304 INCHES MINIMUM AND 0.320 INCHES MAXIMUM IN
STYLE DESIGNATORBUTT STAGGERED HOLES
OVERALL LENGTH3.000 INCHES NOMINAL IN
HINGE PININCLUDED
MATERIAL THICKNESS0.103 INCHES MINIMUM AND 0.115 INCHES MAXIMUM IN
KNUCKLE QUANTITY3
SURFACE TREATMENTANODIZE OVERALL
MATERIALALUMINUM ALLOY 2024 OVERALL
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
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 6521-70-905-8116?
6521-70-905-8116 is a LEAF,BUTT HINGE.
What is the NSN for 6521-70-905-8116?
6521-70-905-8116 is cataloged in the U.S. Government catalog under NSN 5340-01-144-4302. 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.