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B53003 — SEAL,PLAIN ENCASED

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

B53003: SEAL,PLAIN ENCASED.

The SEAL,PLAIN ENCASED is a the manufacturer industrial component. Key specifications include material: STEEL CORROSION RESISTING CASE, case_style: SQUARE, seal_width: 0.532 INCHES MINIMUM AND 0.568 INCHES MAXIMUM IN, temp_rating: -65.0 FAHRENHEIT AND 160.0 FAHRENHEIT DEGF, special_features: FIT, FORM, AND FUNCTION. ACTION ID 45405475, housing_bore_diameter: 1.626 INCHES MINIMUM AND 1.627 INCHES MAXIMUM IN.

This part is cataloged in the U.S. Government catalog under NSN 5330-00-165-4690, 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
B53003
NSN: 5330-00-165-4690
FSC: 5330 — Packing and Gasket Materials
CAGE: 77842 — EATON CORPORATION DBA EATON INOAC DIV EATON (USA)
SPECIFICATIONS
materialSTEEL CORROSION RESISTING CASE
case_styleSQUARE
seal_width0.532 INCHES MINIMUM AND 0.568 INCHES MAXIMUM IN
temp_rating-65.0 FAHRENHEIT AND 160.0 FAHRENHEIT DEGF
special_featuresFIT, FORM, AND FUNCTION. ACTION ID 45405475
housing_bore_diameter1.626 INCHES MINIMUM AND 1.627 INCHES MAXIMUM IN
sealing_element_styleVERTICAL
accommodated_shaft_diameter1.020 INCHES MINIMUM AND 1.065 INCHES MAXIMUM IN
criticality_code_justificationFEAT
NSN5330-00-165-4690
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: B53003 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
•
TEMP RATING: -65.0 FAHRENHEIT AND 160.0 FAHRENHEIT DEGF
•
SEAL WIDTH: 0.532 INCHES MINIMUM AND 0.568 INCHES MAXIMUM IN
•
SEALING ELEMENT STYLE: VERTICAL
•
CRITICALITY CODE JUSTIFICATION: FEAT
•
HOUSING BORE DIAMETER: 1.626 INCHES MINIMUM AND 1.627 INCHES MAXIMUM IN
•
CASE STYLE: SQUARE
•
ACCOMMODATED SHAFT DIAMETER: 1.020 INCHES MINIMUM AND 1.065 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS
TEMP RATING-65.0 FAHRENHEIT AND 160.0 FAHRENHEIT DEGF
SEAL WIDTH0.532 INCHES MINIMUM AND 0.568 INCHES MAXIMUM IN
SEALING ELEMENT STYLEVERTICAL
CRITICALITY CODE JUSTIFICATIONFEAT
HOUSING BORE DIAMETER1.626 INCHES MINIMUM AND 1.627 INCHES MAXIMUM IN
CASE STYLESQUARE
SPECIAL FEATURESFIT, FORM, AND FUNCTION. ACTION ID 45405475
ACCOMMODATED SHAFT DIAMETER1.020 INCHES MINIMUM AND 1.065 INCHES MAXIMUM IN
MATERIALSTEEL CORROSION RESISTING CASE
SUBSTITUTES & CROSS-REFERENCES 1
903-0100-050Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is B53003?
B53003 is a SEAL,PLAIN ENCASED.
What parts can replace B53003?
There is 1 known substitute for B53003: 903-0100-050. Substitute compatibility should be verified for your specific system.
What is the NSN for B53003?
B53003 is cataloged in the U.S. Government catalog under NSN 5330-00-165-4690. 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.