PartsTable
Technical Data Sheet
6577ST ✓ 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 SEAL,PLAIN ENCASED is a the manufacturer industrial component. Key specifications include material: RUBBER SYNTHETIC SEALING ELEMENT, case_style: SQUARE, seal_width: 0.313 INCHES NOMINAL IN, housing_bore_diameter: 1.250 INCHES NOMINAL IN, sealing_element_style: ANGULAR, accommodated_shaft_diameter: 0.750 INCHES NOMINAL IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-00-311-2519, 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
6577ST
NSN: 5330-00-311-2519
FSC: 5330
CAGE: 01212 — FEDERAL-MOGUL CORP GOVERNMENT SALES DEPT (USA)
SPECIFICATIONS
materialRUBBER SYNTHETIC SEALING ELEMENT
case_styleSQUARE
seal_width0.313 INCHES NOMINAL IN
housing_bore_diameter1.250 INCHES NOMINAL IN
sealing_element_styleANGULAR
accommodated_shaft_diameter0.750 INCHES NOMINAL IN
NSN5330-00-311-2519
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 6577ST 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
CASE STYLE: SQUARE
SEALING ELEMENT STYLE: ANGULAR
HOUSING BORE DIAMETER: 1.250 INCHES NOMINAL IN
SEAL WIDTH: 0.313 INCHES NOMINAL IN
ACCOMMODATED SHAFT DIAMETER: 0.750 INCHES NOMINAL IN
MATERIAL: STEEL CASE
TECHNICAL CHARACTERISTICS (FLIS)
CASE STYLESQUARE
SEALING ELEMENT STYLEANGULAR
HOUSING BORE DIAMETER1.250 INCHES NOMINAL IN
SEAL WIDTH0.313 INCHES NOMINAL IN
ACCOMMODATED SHAFT DIAMETER0.750 INCHES NOMINAL IN
MATERIALSTEEL CASE
MATERIALRUBBER SYNTHETIC SEALING ELEMENT
VERIFIED SUBSTITUTES & CROSS-REFERENCES 16
716-058417Interchangeable
interchangeable cross-reference
interchangeable
573Interchangeable
interchangeable cross-reference
interchangeable
55376Interchangeable
interchangeable cross-reference
interchangeable
70633Interchangeable
interchangeable cross-reference
interchangeable
J35Interchangeable
interchangeable cross-reference
interchangeable
JNG1Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 6577ST?
6577ST is a SEAL,PLAIN ENCASED.
What parts can replace 6577ST?
There are 16 known substitutes for 6577ST: 716-058417, 573, 55376 and 13 more. Substitute compatibility should be verified for your specific system.
Is 6577ST still available?
6577ST is currently cancelled.
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