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Technical Data Sheet
PartsTable / COMPONENT / 645-9
645-9 ✓ Verified by PartsTable
Multibrackets · 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 M Pro Series - Enclosure Holder Large 550mm is an optional part for the M Pro Series. Multibrackets M Pro Series - Enclosure Holder Large 550mm is a mount attaches directly to the enclosures mounting holes for a convenient and adjustable setup.<br> This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-00-161-1180, 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
645-9
NSN: 5340-00-161-1180
FSC: 5340
CAGE: 80375 — CRONAME DIV GRAND SHEET METAL PRODUCTS CO (USA)
SPECIFICATIONS
ratchetNOT INCLUDED
materialCOPPER ALLOY BUSHING
power_rating4.00 WATTS NORMAL
end_item_nameTRUCK
overall_height0.938 INCHES NOMINAL IN
end_item_source23040
inside_diameter0.250 INCHES NOMINAL IN
mounting_methodUNTHREADED HOLE(S)
transducer_typeCONE
outside_diameter3.000 INCHES NOMINAL IN
special_featuresINCL ONE SETSCREW FOR ATTACHING
component_quantity5
NSN5340-00-161-1180
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 645-9 MFR: Multibrackets ⚠ 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
•
INSIDE DIAMETER: 0.250 INCHES NOMINAL IN
•
MATERIAL: COPPER ALLOY BUSHING
•
HANDLE ROTATING FEATURE: NOT INCLUDED
•
HANDLE COUNTERBALANCING WEIGHT: NOT INCLUDED
•
DRIVE FACILITY STYLE: ROUND
TECHNICAL CHARACTERISTICS (FLIS)
OVERALL HEIGHT0.938 INCHES NOMINAL IN
INSIDE DIAMETER0.250 INCHES NOMINAL IN
MATERIALCOPPER ALLOY BUSHING
MATERIALPLASTIC PHENOLIC WHEEL
HANDLE ROTATING FEATURENOT INCLUDED
HANDLE COUNTERBALANCING WEIGHTNOT INCLUDED
SPECIAL FEATURESINCL ONE SETSCREW FOR ATTACHING
DRIVE FACILITY STYLEROUND
RATCHETNOT INCLUDED
OUTSIDE DIAMETER3.000 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 14
7128Interchangeable
interchangeable cross-reference
interchangeable
6459-3VInterchangeable
interchangeable cross-reference
interchangeable
1310-200Interchangeable
interchangeable cross-reference
interchangeable
GNYSURG-5-3V-ASSYInterchangeable
interchangeable cross-reference
interchangeable
10995Interchangeable
interchangeable cross-reference
interchangeable
645-18Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 645-9?
645-9 is a LOUDSPEAKER,PERMANENT MAGNET manufactured by Multibrackets.
What parts can replace 645-9?
There are 14 known substitutes for 645-9: 7128, 6459-3V, 1310-200 and 11 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 645-9?
645-9 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-00-161-1180. 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