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344539R — LEAF,BUTT HINGE

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

344539R: LEAF,BUTT HINGE.

The LEAF,BUTT HINGE is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, hinge_pin: INCLUDED, knuckle_length: 0.486 INCHES MINIMUM AND 0.490 INCHES MAXIMUM IN, overall_length: 50.578 INCHES NOMINAL IN, performance_type: NOT RATED, material_thickness: 0.050 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5340-00-536-9549, 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
344539R
NSN: 5340-00-536-9549
FSC: 5340 — Hardware, Commercial
CAGE: 98897 — LOCKHEED MARTIN CORP (USA)
SPECIFICATIONS
materialSTEEL OVERALL
hinge_pinINCLUDED
knuckle_length0.486 INCHES MINIMUM AND 0.490 INCHES MAXIMUM IN
overall_length50.578 INCHES NOMINAL IN
knuckle_quantity8
performance_typeNOT RATED
material_thickness0.050 INCHES NOMINAL IN
reversible_featureNOT INCLUDED
mounting_hole_quantity5
knuckle_inside_diameter0.640 INCHES MINIMUM AND 0.644 INCHES MAXIMUM IN
pin_center_to_body_edge_distance1.220 INCHES NOMINAL IN
NSN5340-00-536-9549
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 344539R 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: 0.640 INCHES MINIMUM AND 0.644 INCHES MAXIMUM IN
•
PIN CENTER TO BODY EDGE DISTANCE: 1.220 INCHES NOMINAL IN
•
HINGE PIN: INCLUDED
•
MATERIAL THICKNESS: 0.050 INCHES NOMINAL IN
•
KNUCKLE QUANTITY: 8
TECHNICAL CHARACTERISTICS
MOUNTING HOLE QUANTITY5
REVERSIBLE FEATURENOT INCLUDED
KNUCKLE INSIDE DIAMETER0.640 INCHES MINIMUM AND 0.644 INCHES MAXIMUM IN
OVERALL LENGTH50.578 INCHES NOMINAL IN
PIN CENTER TO BODY EDGE DISTANCE1.220 INCHES NOMINAL IN
HINGE PININCLUDED
MATERIAL THICKNESS0.050 INCHES NOMINAL IN
KNUCKLE QUANTITY8
KNUCKLE LENGTH0.486 INCHES MINIMUM AND 0.490 INCHES MAXIMUM IN
MATERIALSTEEL 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 1
5340PL2023453Reference document
Same NSN cross-reference
Reference document — Informative reference only
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 344539R?
344539R is a LEAF,BUTT HINGE.
What parts can replace 344539R?
There is 1 known substitute for 344539R: 5340PL2023453. Substitute compatibility should be verified for your specific system.
What is the NSN for 344539R?
344539R is cataloged in the U.S. Government catalog under NSN 5340-00-536-9549. 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.