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517D — PADLOCK

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

517D: PADLOCK.

The PADLOCK is a the manufacturer industrial component. Key specifications include construction: LAMINATED, overall_width: 1.750 INCHES NOMINAL IN, shackle_diameter: 0.281 INCHES NOMINAL IN, shackle_clearance: 2.750 INCHES MINIMUM AND 5.375 INCHES MAXIMUM IN, surface_treatment: CADMIUM OVERALL, key_change_quantity: 36. This part is cataloged in the U.S.

Government catalog under NSN 5340-00-290-4670, 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
517D
NSN: 5340-00-290-4670
FSC: 5340 — Hardware, Commercial
CAGE: 38797 — MASTER LOCK COMPANY LLC (USA)
SPECIFICATIONS
constructionLAMINATED
overall_width1.750 INCHES NOMINAL IN
shackle_diameter0.281 INCHES NOMINAL IN
shackle_clearance2.750 INCHES MINIMUM AND 5.375 INCHES MAXIMUM IN
surface_treatmentCADMIUM OVERALL
key_change_quantity36
operating_mechanism_typeLEVER TUMBLER
NSN5340-00-290-4670
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 517D 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
•
SHACKLE CLEARANCE: 2.750 INCHES MINIMUM AND 5.375 INCHES MAXIMUM IN
•
KEY CHANGE QUANTITY: 36
•
OPERATING MECHANISM TYPE: LEVER TUMBLER
•
SURFACE TREATMENT: CADMIUM OVERALL
•
SHACKLE DIAMETER: 0.281 INCHES NOMINAL IN
•
CONSTRUCTION: LAMINATED
TECHNICAL CHARACTERISTICS
SHACKLE CLEARANCE2.750 INCHES MINIMUM AND 5.375 INCHES MAXIMUM IN
KEY CHANGE QUANTITY36
OPERATING MECHANISM TYPELEVER TUMBLER
OVERALL WIDTH1.750 INCHES NOMINAL IN
SURFACE TREATMENTCADMIUM OVERALL
SHACKLE DIAMETER0.281 INCHES NOMINAL IN
CONSTRUCTIONLAMINATED
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
517Reference document
Same NSN cross-reference
Reference document — Design control — primary reference
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 517D?
517D is a PADLOCK.
What parts can replace 517D?
There is 1 known substitute for 517D: 517. Substitute compatibility should be verified for your specific system.
What is the NSN for 517D?
517D is cataloged in the U.S. Government catalog under NSN 5340-00-290-4670. 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.