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641727 — PACKING,PREFORMED

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

641727: PACKING,PREFORMED.

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 U.S.

Government catalog 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
NIINs: 001873635, 009622971
FSC: 5330 — Packing and Gasket Materials
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
•
CROSS-SECTIONAL HEIGHT: 0.100 INCHES MINIMUM AND 0.106 INCHES MAXIMUM IN
•
CENTER HOLE DIAMETER: 0.544 INCHES MINIMUM AND 0.554 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS
CROSS-SECTIONAL HEIGHT0.100 INCHES MINIMUM AND 0.106 INCHES MAXIMUM IN
CENTER HOLE DIAMETER0.544 INCHES MINIMUM AND 0.554 INCHES MAXIMUM IN
SUBSTITUTES & CROSS-REFERENCES 9
1281-3018Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
2900-103ALTCPC19Reference document
Same NSN cross-reference
Reference document — Secondary reference
AN6227-11Reference document
Same NSN cross-reference
Reference document — Secondary reference
253070R1Reference document
Same NSN cross-reference
Reference document — Secondary reference
JP2001-8Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
8613659Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusCancelled· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 641727?
641727 is a PACKING,PREFORMED.
What parts can replace 641727?
There are 9 known substitutes for 641727: 1281-3018, 2900-103ALTCPC19, AN6227-11 and 6 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 641727?
641727 is cataloged in the U.S. Government catalog under NSN 5330-00-187-3635. 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.