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Technical Data Sheet
PartsTable / COMPONENT / B5-45-2757
B5-45-2757 ✓ 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: STEEL CORROSION RESISTING ENDS, case_style: SQUARE, seal_width: 1.110 INCHES NOMINAL IN, special_features: SEAL FACE GRAPHITE-CARBON; SEAL SEAT CERAMIC, sealing_element_style: VERTICAL, accommodated_shaft_diameter: 0.640 INCHES MINIMUM AND 0.765 INCHES MAXIMUM IN. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-00-819-4030, 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
B5-45-2757
NSN: 5330-00-819-4030
FSC: 5330
CAGE: 81361 — EDGEWOOD CHEMICAL BIOLOGICAL CENTER ECBC (USA)
SPECIFICATIONS
materialSTEEL CORROSION RESISTING ENDS
case_styleSQUARE
seal_width1.110 INCHES NOMINAL IN
special_featuresSEAL FACE GRAPHITE-CARBON; SEAL SEAT CERAMIC
sealing_element_styleVERTICAL
accommodated_shaft_diameter0.640 INCHES MINIMUM AND 0.765 INCHES MAXIMUM IN
NSN5330-00-819-4030
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: B5-45-2757 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
•
SEAL WIDTH: 1.110 INCHES NOMINAL IN
•
CASE STYLE: SQUARE
•
ACCOMMODATED SHAFT DIAMETER: 0.640 INCHES MINIMUM AND 0.765 INCHES MAXIMUM IN
•
MATERIAL: STEEL CORROSION RESISTING ENDS
•
SEALING ELEMENT STYLE: VERTICAL
TECHNICAL CHARACTERISTICS (FLIS)
SEAL WIDTH1.110 INCHES NOMINAL IN
CASE STYLESQUARE
ACCOMMODATED SHAFT DIAMETER0.640 INCHES MINIMUM AND 0.765 INCHES MAXIMUM IN
MATERIALSTEEL CORROSION RESISTING ENDS
SEALING ELEMENT STYLEVERTICAL
SPECIAL FEATURESSEAL FACE GRAPHITE-CARBON; SEAL SEAT CERAMIC
VERIFIED SUBSTITUTES & CROSS-REFERENCES 13
A2-35Interchangeable
interchangeable cross-reference
interchangeable
658-451Interchangeable
interchangeable cross-reference
interchangeable
A5-35Interchangeable
interchangeable cross-reference
interchangeable
278-0353-010Interchangeable
interchangeable cross-reference
interchangeable
278-0353-011Interchangeable
interchangeable cross-reference
interchangeable
MIL-F-5509Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is B5-45-2757?
B5-45-2757 is a SEAL,PLAIN ENCASED.
What parts can replace B5-45-2757?
There are 13 known substitutes for B5-45-2757: A2-35, 658-451, A5-35 and 10 more. Substitute compatibility should be verified for your specific system.
What is the NSN for B5-45-2757?
B5-45-2757 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-00-819-4030. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026