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PartsTable / COMPONENT / 641727
641727 ✓ 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

The PACKING,PREFORMED is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, end_style: DOBBY HOOK FIRST END, design_type: CLOSED, load_rating: 17.00 POUNDS MINIMUM AND 19.00 POUNDS MAXIMUM LBS, coil_quantity: 35-1/4, opening_width: 0.130 INCHES NOMINAL BOTH ENDS IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-00-187-3635, 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
641727
NSN: 5330-00-187-3635
FSC: 5330
CAGE: 12603 — CLARK EQUIPMENT CO (USA)
SPECIFICATIONS
materialSTEEL OVERALL
end_styleDOBBY HOOK FIRST END
design_typeCLOSED
load_rating17.00 POUNDS MINIMUM AND 19.00 POUNDS MAXIMUM LBS
coil_quantity35-1/4
opening_width0.130 INCHES NOMINAL BOTH ENDS IN
inside_diameter0.840 INCHES NOMINAL IN
style_designatorCYLINDRICAL
spring_free_length5.160 INCHES NOMINAL IN
coil_helix_directionRIGHT-HAND OR LEFT-HAND
spring_deflection_rate2.110 POUNDS PER INCH NOMINAL LBS
spring_length_under_load14.000 INCHES NOMINAL IN
NSN5330-00-187-3635
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 641727 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
•
CENTER HOLE DIAMETER: 0.544 INCHES MINIMUM AND 0.554 INCHES MAXIMUM IN
•
CROSS-SECTIONAL HEIGHT: 0.100 INCHES MINIMUM AND 0.106 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS (FLIS)
CENTER HOLE DIAMETER0.544 INCHES MINIMUM AND 0.554 INCHES MAXIMUM IN
CROSS-SECTIONAL HEIGHT0.100 INCHES MINIMUM AND 0.106 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 35
3379581Interchangeable
interchangeable cross-reference
interchangeable
3379581-1Interchangeable
interchangeable cross-reference
interchangeable
26945Interchangeable
interchangeable cross-reference
interchangeable
2100-811724REVCPC11Interchangeable
interchangeable cross-reference
interchangeable
2100-811715REVEPC12Interchangeable
interchangeable cross-reference
interchangeable
2100-811785REVAPC11Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 641727?
641727 is a PACKING,PREFORMED.
What parts can replace 641727?
There are 35 known substitutes for 641727: 3379581, 3379581-1, 26945 and 32 more. Substitute compatibility should be verified for your specific system.
Is 641727 still available?
641727 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