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Technical Data Sheet
PartsTable / COMPONENT / SM-B-545066
SM-B-545066 ✓ 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 material: RUBBER SILICONE BODY, dome_height: 0.375 INCHES NOMINAL IN, thread_class: 2B, thread_series: UNS, overall_height: 0.718 INCHES NOMINAL IN, sealing_method: COMPRESSION. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-00-937-9020, 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
SM-B-545066
NSN: 5340-00-937-9020
FSC: 5340
CAGE: 80063 — US ARMY COMMUNICATIONS & ELECTRONICS MATERIEL READINESS COMMAND LOGISTICS ENGINEERING DIR (USA)
SPECIFICATIONS
materialRUBBER SILICONE BODY
dome_height0.375 INCHES NOMINAL IN
thread_class2B
thread_seriesUNS
overall_height0.718 INCHES NOMINAL IN
sealing_methodCOMPRESSION
mounting_methodFRICTION AND INTEGRAL THREADED NUT
style_designatorCLOSED END
width_across_flats0.625 INCHES NOMINAL IN
nominal_thread_size0.438 INCHES IN
base_thread_locationINTERNAL
mounting_device_quantity2
NSN5340-00-937-9020
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: SM-B-545066 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
•
MOUNTING DEVICE QUANTITY: 2
•
BASE THREAD LOCATION: INTERNAL
•
THREAD QUANTITY PER INCH: 32
•
NOMINAL THREAD SIZE: 0.438 INCHES IN
•
THREAD SERIES: UNS
•
THREAD CLASS: 2B
•
STYLE DESIGNATOR: CLOSED END
TECHNICAL CHARACTERISTICS (FLIS)
MOUNTING DEVICE QUANTITY2
OVERALL HEIGHT0.718 INCHES NOMINAL IN
BASE THREAD LOCATIONINTERNAL
THREAD QUANTITY PER INCH32
NOMINAL THREAD SIZE0.438 INCHES IN
THREAD SERIESUNS
THREAD CLASS2B
STYLE DESIGNATORCLOSED END
DOME HEIGHT0.375 INCHES NOMINAL IN
MOUNTING METHODFRICTION AND INTEGRAL THREADED NUT
VERIFIED SUBSTITUTES & CROSS-REFERENCES 15
40141Interchangeable
interchangeable cross-reference
interchangeable
41038 STYLEP2Interchangeable
interchangeable cross-reference
interchangeable
T1033Interchangeable
interchangeable cross-reference
interchangeable
41389SInterchangeable
interchangeable cross-reference
interchangeable
304452Interchangeable
interchangeable cross-reference
interchangeable
77993Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is SM-B-545066?
SM-B-545066 is a BOOT,DUST AND MOISTURE SEAL.
What parts can replace SM-B-545066?
There are 15 known substitutes for SM-B-545066: 40141, 41038 STYLEP2, T1033 and 12 more. Substitute compatibility should be verified for your specific system.
What is the NSN for SM-B-545066?
SM-B-545066 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-00-937-9020. 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