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Technical Data Sheet
3-4X77-545 ✓ 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 RETAINER,PACKING is a the manufacturer industrial component. Key specifications include material: LEATHER OVERALL, peripheral_diameter: 0.577 INCHES NOMINAL IN, center_hole_diameter: 0.3355 INCHES MINIMUM AND 0.3505 INCHES MAXIMUM IN, cross-sectional_height: 0.084 INCHES MINIMUM AND 0.104 INCHES MAXIMUM IN, cross-sectional_shape_style: SQUARE/RECTANGULAR, material_document_and_classification: MIL-W-5521 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-00-752-8316, 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
3-4X77-545
NSN: 5330-00-752-8316
FSC: 5330
CAGE: 02697 — PARKER-HANNIFIN CORP DIV O-RING DIVISION (USA)
SPECIFICATIONS
materialLEATHER OVERALL
peripheral_diameter0.577 INCHES NOMINAL IN
center_hole_diameter0.3355 INCHES MINIMUM AND 0.3505 INCHES MAXIMUM IN
cross-sectional_height0.084 INCHES MINIMUM AND 0.104 INCHES MAXIMUM IN
cross-sectional_shape_styleSQUARE/RECTANGULAR
material_document_and_classificationMIL-W-5521 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
NSN5330-00-752-8316
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 3-4X77-545 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
MATERIAL DOCUMENT AND CLASSIFICATION: MIL-W-5521 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
MATERIAL: LEATHER OVERALL
CROSS-SECTIONAL SHAPE STYLE: SQUARE/RECTANGULAR
PERIPHERAL DIAMETER: 0.577 INCHES NOMINAL IN
CROSS-SECTIONAL HEIGHT: 0.084 INCHES MINIMUM AND 0.104 INCHES MAXIMUM IN
CENTER HOLE DIAMETER: 0.3355 INCHES MINIMUM AND 0.3505 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS (FLIS)
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-W-5521 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
MATERIALLEATHER OVERALL
CROSS-SECTIONAL SHAPE STYLESQUARE/RECTANGULAR
PERIPHERAL DIAMETER0.577 INCHES NOMINAL IN
CROSS-SECTIONAL HEIGHT0.084 INCHES MINIMUM AND 0.104 INCHES MAXIMUM IN
CENTER HOLE DIAMETER0.3355 INCHES MINIMUM AND 0.3505 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 17
1283-4Interchangeable
interchangeable cross-reference
interchangeable
LTCT21026-04Interchangeable
interchangeable cross-reference
interchangeable
10195746Interchangeable
interchangeable cross-reference
interchangeable
G-2000-4Interchangeable
interchangeable cross-reference
interchangeable
7384284Interchangeable
interchangeable cross-reference
interchangeable
GGG-C-755Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 3-4X77-545?
3-4X77-545 is a RETAINER,PACKING.
What parts can replace 3-4X77-545?
There are 17 known substitutes for 3-4X77-545: 1283-4, LTCT21026-04, 10195746 and 14 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 3-4X77-545?
3-4X77-545 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-00-752-8316. This indicates validated use in U.S. government and defense supply chains.
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