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121248 ✓ 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 VENTILATOR,AIR CIRCULATING is a the manufacturer industrial component. Key specifications include criticality_code_justification: ZZZY, reference_number_differentiating_characteristics: MATERIAL WILL BE IN ACCORDANCE WITH NAVICP ACTIVITY HX QUALITY CONTROL, MANUFACTURING AND TESTING SPECIFICATIONS. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-00-257-0050, 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
121248
NSN: 5340-00-257-0050
FSC: 5340
CAGE: 57712 — TELEMECHANICS INC (USA)
SPECIFICATIONS
criticality_code_justificationZZZY
reference_number_differentiating_characteristicsMATERIAL WILL BE IN ACCORDANCE WITH NAVICP ACTIVITY HX QUALITY CONTROL, MANUFACTURING AND TESTING SPECIFICATIONS
NSN5340-00-257-0050
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 121248 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
•
DISTANCE FROM LOOP CENTER TO TONGUE END: 0.7805 INCHES NOMINAL IN
•
MATERIAL: PLASTIC BAND
•
DIAMETER: 0.204 INCHES NOMINAL IN
•
STYLE DESIGNATOR: SINGLE LOOP
•
CENTER TO CENTER DISTANCE BETWEEN LOOP AND MOUNTING HOLE: 0.5625 INCHES NOMINAL IN
•
MATERIAL THICKNESS: 0.062 INCHES NOMINAL IN
•
TONGUE HOLE TYPE: ROUND, UNTHREADED
•
LOOP INSIDE DIAMETER: 0.500 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
DISTANCE FROM LOOP CENTER TO TONGUE END0.7805 INCHES NOMINAL IN
MATERIALPLASTIC BAND
DIAMETER0.204 INCHES NOMINAL IN
STYLE DESIGNATORSINGLE LOOP
CENTER TO CENTER DISTANCE BETWEEN LOOP AND MOUNTING HOLE0.5625 INCHES NOMINAL IN
MATERIAL THICKNESS0.062 INCHES NOMINAL IN
TONGUE HOLE TYPEROUND, UNTHREADED
LOOP INSIDE DIAMETER0.500 INCHES NOMINAL IN
OVERALL WIDTH0.500 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 10
1PM008-007Upgraded Successor
successor cross-reference
successor
CPC742-8Upgraded Successor
successor cross-reference
successor
50MM612-9Upgraded Successor
successor cross-reference
successor
121248Interchangeable
interchangeable cross-reference
interchangeable
SCD47926Interchangeable
interchangeable cross-reference
interchangeable
L000383PC41Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 121248?
121248 is a VENTILATOR,AIR CIRCULATING.
What parts can replace 121248?
There are 10 known substitutes for 121248: 1PM008-007, CPC742-8, 50MM612-9 and 7 more. Substitute compatibility should be verified for your specific system.
Is 121248 still available?
121248 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