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K543 ✓ Verified by PartsTable
— · ORING SEAL
WHAT YOU NEED TO KNOW
Material determines chemical compatibility Standard durometer is 70 Shore A
Wrong material = catastrophic seal failure
PRODUCT OVERVIEW

CONTACT POSITIONER,TERMINAL CRIM. Key specifications include material: STEEL OVERALL, end_radius: 0.593 INCHES NOMINAL IN, fork_depth: 3.387 INCHES NOMINAL IN, thread_class: 2B ROD CONNECTION, hole_diameter: 0.623 INCHES MINIMUM AND 0.626 INCHES MAXIMUM IN, overall_width: 1.365 INCHES MINIMUM AND 1.385 INCHES MAXIMUM IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-00-985-0835, 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
K543
NSN: 5340-00-985-0835
FSC: 5340
CAGE: 30798 — AMCA INTL CORP INSLEY MFG CORP DIV (USA)
SPECIFICATIONS
materialSTEEL OVERALL
end_radius0.593 INCHES NOMINAL IN
fork_depth3.387 INCHES NOMINAL IN
thread_class2B ROD CONNECTION
hole_diameter0.623 INCHES MINIMUM AND 0.626 INCHES MAXIMUM IN
overall_width1.365 INCHES MINIMUM AND 1.385 INCHES MAXIMUM IN
thread_length1.062 INCHES NOMINAL ROD CONNECTION IN
shank_diameter1.062 INCHES NOMINAL IN
fork_span_width0.677 INCHES MINIMUM AND 0.697 INCHES MAXIMUM IN
style_designatorCLEVIS
thread_directionRIGHT-HAND ROD CONNECTION
surface_treatmentZINC OVERALL
NSN5340-00-985-0835
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: K543 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
•
SURFACE TREATMENT: ZINC OVERALL
•
NOMINAL THREAD SIZE: 0.625 INCHES ROD CONNECTION IN
•
DISTANCE FROM PIVOT PINHOLE CENTER TO ROD CONNECTION END: 4.937 INCHES NOMINAL IN
•
SHANK DIAMETER: 1.062 INCHES NOMINAL IN
•
THREAD LENGTH: 1.062 INCHES NOMINAL ROD CONNECTION IN
•
THREAD DIRECTION: RIGHT-HAND ROD CONNECTION
•
MATERIAL: STEEL OVERALL
TECHNICAL CHARACTERISTICS (FLIS)
SURFACE TREATMENTZINC OVERALL
NOMINAL THREAD SIZE0.625 INCHES ROD CONNECTION IN
DISTANCE FROM PIVOT PINHOLE CENTER TO ROD CONNECTION END4.937 INCHES NOMINAL IN
OVERALL WIDTH1.365 INCHES MINIMUM AND 1.385 INCHES MAXIMUM IN
SHANK DIAMETER1.062 INCHES NOMINAL IN
THREAD LENGTH1.062 INCHES NOMINAL ROD CONNECTION IN
THREAD DIRECTIONRIGHT-HAND ROD CONNECTION
MATERIALSTEEL OVERALL
THREAD SERIES DESIGNATORUNF ROD CONNECTION
FORK DEPTH3.387 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 24
00-0607-000-00Upgraded Successor
successor cross-reference
successor
607Upgraded Successor
successor cross-reference
successor
98-1207Upgraded Successor
successor cross-reference
successor
41030-10Upgraded Successor
successor cross-reference
successor
MS35812-8Interchangeable
interchangeable cross-reference
interchangeable
MIL-C-45918Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is K543?
K543 is a CONTACT POSITIONER,TERMINAL CRIM.
What parts can replace K543?
There are 24 known substitutes for K543: 00-0607-000-00, 607, 98-1207 and 21 more. Substitute compatibility should be verified for your specific system.
Is K543 still available?
K543 is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026