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Technical Data Sheet
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SR66 ✓ 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 BOOT,DUST AND MOISTURE SEAL is a the manufacturer industrial component. Key specifications include radius: 0.031 INCHES NOMINAL IN, material: RUBBER NATURAL BODY, overall_height: 0.562 INCHES NOMINAL IN, style_designator: CLOSED END, material_thickness: 0.047 INCHES NOMINAL IN, fsc_application_data: BRAKES,LOCOMOTIVE,DIESEL,ELECTRIC. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-00-377-2001, 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
SR66
NSN: 5340-00-377-2001
FSC: 5340
CAGE: 43491 — GENERAL SIGNAL CORP (USA)
SPECIFICATIONS
radius0.031 INCHES NOMINAL IN
materialRUBBER NATURAL BODY
overall_height0.562 INCHES NOMINAL IN
style_designatorCLOSED END
material_thickness0.047 INCHES NOMINAL IN
fsc_application_dataBRAKES,LOCOMOTIVE,DIESEL,ELECTRIC
body_outside_diameter1.094 INCHES NOMINAL IN
NSN5340-00-377-2001
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: SR66 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
•
STYLE DESIGNATOR: CLOSED END
•
FSC APPLICATION DATA: BRAKES,LOCOMOTIVE,DIESEL,ELECTRIC
•
MATERIAL: RUBBER NATURAL BODY
•
RADIUS: 0.031 INCHES NOMINAL IN
•
BODY OUTSIDE DIAMETER: 1.094 INCHES NOMINAL IN
•
MATERIAL THICKNESS: 0.047 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
STYLE DESIGNATORCLOSED END
FSC APPLICATION DATABRAKES,LOCOMOTIVE,DIESEL,ELECTRIC
MATERIALRUBBER NATURAL BODY
OVERALL HEIGHT0.562 INCHES NOMINAL IN
RADIUS0.031 INCHES NOMINAL IN
BODY OUTSIDE DIAMETER1.094 INCHES NOMINAL IN
MATERIAL THICKNESS0.047 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 3
526344Upgraded Successor
successor cross-reference
successor
P5101Upgraded Successor
successor cross-reference
successor
9006199Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is SR66?
SR66 is a BOOT,DUST AND MOISTURE SEAL.
What parts can replace SR66?
There are 3 known substitutes for SR66: 526344, P5101, 9006199. Substitute compatibility should be verified for your specific system.
Is SR66 still available?
SR66 is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026