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A51B52550-13 — LEAF,BUTT HINGE

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

A51B52550-13: LEAF,BUTT HINGE.

The LEAF,BUTT HINGE is a the manufacturer industrial component. Key specifications include material: ALUMINUM ALLOY OVERALL, hinge_pin: NOT INCLUDED, knuckle_type: FRICTION, knuckle_length: 0.481 INCHES MINIMUM AND 0.485 INCHES MAXIMUM IN, overall_length: 49.745 INCHES NOMINAL IN, knuckle_quantity: 17. This part is cataloged in the U.S.

Government catalog under NSN 5340-00-009-0475, 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
A51B52550-13
NSN: 5340-00-009-0475
FSC: 5340 — Hardware, Commercial
CAGE: 79RG9 — NORTHROP GRUMMAN SYSTEMS CORPORATION (USA)
SPECIFICATIONS
materialALUMINUM ALLOY OVERALL
hinge_pinNOT INCLUDED
knuckle_typeFRICTION
knuckle_length0.481 INCHES MINIMUM AND 0.485 INCHES MAXIMUM IN
overall_length49.745 INCHES NOMINAL IN
knuckle_quantity17
style_designatorBUTT BLANK
surface_treatmentANODIZE OVERALL
material_thickness0.063 INCHES NOMINAL IN
reversible_featureNOT INCLUDED
knuckle_inside_diameter0.093 INCHES MINIMUM AND 0.098 INCHES MAXIMUM IN
pin_center_to_body_edge_distance1.040 INCHES NOMINAL IN
NSN5340-00-009-0475
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: A51B52550-13 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
•
KNUCKLE INSIDE DIAMETER: 0.093 INCHES MINIMUM AND 0.098 INCHES MAXIMUM IN
•
STYLE DESIGNATOR: BUTT BLANK
•
PIN CENTER TO BODY EDGE DISTANCE: 1.040 INCHES NOMINAL IN
•
HINGE PIN: NOT INCLUDED
•
MATERIAL THICKNESS: 0.063 INCHES NOMINAL IN
•
KNUCKLE QUANTITY: 17
TECHNICAL CHARACTERISTICS
REVERSIBLE FEATURENOT INCLUDED
KNUCKLE INSIDE DIAMETER0.093 INCHES MINIMUM AND 0.098 INCHES MAXIMUM IN
STYLE DESIGNATORBUTT BLANK
OVERALL LENGTH49.745 INCHES NOMINAL IN
PIN CENTER TO BODY EDGE DISTANCE1.040 INCHES NOMINAL IN
HINGE PINNOT INCLUDED
MATERIAL THICKNESS0.063 INCHES NOMINAL IN
KNUCKLE QUANTITY17
KNUCKLE LENGTH0.481 INCHES MINIMUM AND 0.485 INCHES MAXIMUM IN
SURFACE TREATMENTANODIZE 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
Acquisition advice: Terminal item — stock exhausted; no further procurementNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is A51B52550-13?
A51B52550-13 is a LEAF,BUTT HINGE.
What is the NSN for A51B52550-13?
A51B52550-13 is cataloged in the U.S. Government catalog under NSN 5340-00-009-0475. 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.