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A51B52520-11 — LEAF,BUTT HINGE

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

A51B52520-11: LEAF,BUTT HINGE.

The LEAF,BUTT HINGE is a the manufacturer industrial component. Key specifications include material: ALUMINUM ALLOY 2024 OVERALL, hinge_pin: NOT INCLUDED, knuckle_type: FRICTION, knuckle_length: 0.481 INCHES MINIMUM AND 0.485 INCHES MAXIMUM IN, overall_length: 17.560 INCHES NOMINAL IN, performance_type: NOT RATED. This part is cataloged in the U.S.

Government catalog under NSN 5340-00-180-2149, 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
A51B52520-11
NSN: 5340-00-180-2149
FSC: 5340 — Hardware, Commercial
CAGE: 79RG9 — NORTHROP GRUMMAN SYSTEMS CORPORATION (USA)
SPECIFICATIONS
materialALUMINUM ALLOY 2024 OVERALL
hinge_pinNOT INCLUDED
knuckle_typeFRICTION
knuckle_length0.481 INCHES MINIMUM AND 0.485 INCHES MAXIMUM IN
overall_length17.560 INCHES NOMINAL IN
knuckle_quantity9
performance_typeNOT RATED
style_designatorBUTT BLANK
surface_treatmentANODIZE OVERALL
end_knuckle_length0.225 INCHES NOMINAL IN
reversible_featureNOT INCLUDED
NSN5340-00-180-2149
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: A51B52520-11 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
•
REVERSIBLE FEATURE: NOT INCLUDED
•
STYLE DESIGNATOR: BUTT BLANK
•
HINGE PIN: NOT INCLUDED
•
KNUCKLE QUANTITY: 9
•
END KNUCKLE LENGTH: 0.225 INCHES NOMINAL IN
•
KNUCKLE LENGTH: 0.481 INCHES MINIMUM AND 0.485 INCHES MAXIMUM IN
•
SURFACE TREATMENT: ANODIZE OVERALL
TECHNICAL CHARACTERISTICS
REVERSIBLE FEATURENOT INCLUDED
STYLE DESIGNATORBUTT BLANK
OVERALL LENGTH17.560 INCHES NOMINAL IN
HINGE PINNOT INCLUDED
KNUCKLE QUANTITY9
END KNUCKLE LENGTH0.225 INCHES NOMINAL IN
KNUCKLE LENGTH0.481 INCHES MINIMUM AND 0.485 INCHES MAXIMUM IN
SURFACE TREATMENTANODIZE OVERALL
MATERIALALUMINUM ALLOY 2024 OVERALL
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 A51B52520-11?
A51B52520-11 is a LEAF,BUTT HINGE.
What is the NSN for A51B52520-11?
A51B52520-11 is cataloged in the U.S. Government catalog under NSN 5340-00-180-2149. 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.