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Technical Data Sheet
PartsTable / COMPONENT / TR4255B
TR4255B ✓ 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 BRACKET,MOUNTING is a the manufacturer industrial component. Key specifications include end_item_identification: HD-1099/TSQ,AIR CONDITONER, part_name_assigned_by_controlling_agency: ARM,MOTOR MOUNT. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-01-550-1287, 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
TR4255B
NSN: 5340-01-550-1287
FSC: 5340
CAGE: 87946 — TRIANGLE MANUFACTURING CO (USA)
SPECIFICATIONS
end_item_identificationHD-1099/TSQ,AIR CONDITONER
part_name_assigned_by_controlling_agencyARM,MOTOR MOUNT
NSN5340-01-550-1287
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: TR4255B 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
TECHNICAL CHARACTERISTICS (FLIS)
END ITEM IDENTIFICATIONHD-1099/TSQ,AIR CONDITONER
PART NAME ASSIGNED BY CONTROLLING AGENCYARM,MOTOR MOUNT
VERIFIED SUBSTITUTES & CROSS-REFERENCES 15
SI-11931Interchangeable
interchangeable cross-reference
interchangeable
A-508Interchangeable
interchangeable cross-reference
interchangeable
E-31100Interchangeable
interchangeable cross-reference
interchangeable
M330-57Interchangeable
interchangeable cross-reference
interchangeable
ASTM D5363Interchangeable
interchangeable cross-reference
interchangeable
ASTM D5363 AN0411 P12Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is TR4255B?
TR4255B is a BRACKET,MOUNTING.
What parts can replace TR4255B?
There are 15 known substitutes for TR4255B: SI-11931, A-508, E-31100 and 12 more. Substitute compatibility should be verified for your specific system.
What is the NSN for TR4255B?
TR4255B is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-01-550-1287. 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