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Technical Data Sheet
121C9 ✓ Verified by PartsTable
· COMPONENT
WHAT YOU NEED TO KNOW
Verify manufacturer and server generation compatibility Check if Option PN or Spare PN — same part, different channel
Confirm exact part number — similar PNs may be different parts
PRODUCT OVERVIEW

The SPRING,HELICAL,COMPRESSION is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, end_style: SPRING END,SQUARED AND GROUND BOTH ENDS, inside_diameter: 0.344 INCHES MINIMUM AND 0.375 INCHES MAXIMUM IN, style_designator: CYLINDRICAL, spring_free_length: 5.125 INCHES MINIMUM AND 5.625 INCHES MAXIMUM IN, spring_solid_length: 1.375 INCHES MAXIMUM IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5360-00-252-8478, 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
121C9
NSN: 5360-00-252-8478
FSC: 5360
CAGE: 72447 — DANA COMMERCIAL VEHICLE MANUFACTURING, LLC DBA DANA COMMERCIAL VEHICLE PRODUCTS (USA)
SPECIFICATIONS
materialSTEEL OVERALL
end_styleSPRING END,SQUARED AND GROUND BOTH ENDS
inside_diameter0.344 INCHES MINIMUM AND 0.375 INCHES MAXIMUM IN
style_designatorCYLINDRICAL
spring_free_length5.125 INCHES MINIMUM AND 5.625 INCHES MAXIMUM IN
spring_solid_length1.375 INCHES MAXIMUM IN
coil_helix_directionRIGHT-HAND OR LEFT-HAND
material_hardness_rating40.0 ROCKWELL C MINIMUM AND 45.0 ROCKWELL C MAXIMUM
spring_free_outside_diameter4.969 INCHES MINIMUM AND 5.000 INCHES MAXIMUM IN
NSN5360-00-252-8478
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available SPRING,HELICAL,COMPRESSION TITLE COMPONENT PN 121C9 MFR SPRING,HELICAL,COMPRES
KEY FEATURES
MATERIAL HARDNESS RATING: 40.0 ROCKWELL C MINIMUM AND 45.0 ROCKWELL C MAXIMUM
END STYLE: SPRING END,SQUARED AND GROUND BOTH ENDS
COIL HELIX DIRECTION: RIGHT-HAND OR LEFT-HAND
SPRING FREE LENGTH: 5.125 INCHES MINIMUM AND 5.625 INCHES MAXIMUM IN
SPRING FREE OUTSIDE DIAMETER: 4.969 INCHES MINIMUM AND 5.000 INCHES MAXIMUM IN
STYLE DESIGNATOR: CYLINDRICAL
MATERIAL: STEEL OVERALL
INSIDE DIAMETER: 0.344 INCHES MINIMUM AND 0.375 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS (FLIS)
MATERIAL HARDNESS RATING40.0 ROCKWELL C MINIMUM AND 45.0 ROCKWELL C MAXIMUM
END STYLESPRING END,SQUARED AND GROUND BOTH ENDS
COIL HELIX DIRECTIONRIGHT-HAND OR LEFT-HAND
SPRING FREE LENGTH5.125 INCHES MINIMUM AND 5.625 INCHES MAXIMUM IN
SPRING FREE OUTSIDE DIAMETER4.969 INCHES MINIMUM AND 5.000 INCHES MAXIMUM IN
STYLE DESIGNATORCYLINDRICAL
MATERIALSTEEL OVERALL
INSIDE DIAMETER0.344 INCHES MINIMUM AND 0.375 INCHES MAXIMUM IN
SPRING SOLID LENGTH1.375 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 18
4912532-01Interchangeable
interchangeable cross-reference
interchangeable
112-1052-046Interchangeable
interchangeable cross-reference
interchangeable
8800 PIECE 53Interchangeable
interchangeable cross-reference
interchangeable
0P683Interchangeable
interchangeable cross-reference
interchangeable
B1538D&B1535CInterchangeable
interchangeable cross-reference
interchangeable
B1538C&B1535CInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 121C9?
121C9 is a SPRING,HELICAL,COMPRESSION.
What parts can replace 121C9?
There are 18 known substitutes for 121C9: 4912532-01, 112-1052-046, 8800 PIECE 53 and 15 more. Substitute compatibility should be verified for your specific system.
Is 121C9 still available?
121C9 is currently cancelled.
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