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Technical Data Sheet
PartsTable / COMPONENT / SP121FF
SP121FF ✓ 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 PAD,CUSHIONING is a the manufacturer industrial component. Key specifications include shape: HORIZONTAL RECTANGULAR, width: 16.5 INCHES NOMINAL IN, length: 21.5 INCHES NOMINAL IN, material: PLASTIC FOAM CUSHIONING, thickness: 5.0 INCHES NOMINAL IN, part_name_assigned_by_controlling_agency: FOAM FILL. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-01-629-9334, 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
SP121FF
NSN: 5340-01-629-9334
FSC: 5340
CAGE: 1T5T4 — ARMACELL LLC (USA)
SPECIFICATIONS
shapeHORIZONTAL RECTANGULAR
width16.5 INCHES NOMINAL IN
length21.5 INCHES NOMINAL IN
materialPLASTIC FOAM CUSHIONING
thickness5.0 INCHES NOMINAL IN
part_name_assigned_by_controlling_agencyFOAM FILL
NSN5340-01-629-9334
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: SP121FF 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
•
LENGTH: 21.5 INCHES NOMINAL IN
•
THICKNESS: 5.0 INCHES NOMINAL IN
•
WIDTH: 16.5 INCHES NOMINAL IN
•
SHAPE: HORIZONTAL RECTANGULAR
•
MATERIAL: PLASTIC FOAM CUSHIONING
TECHNICAL CHARACTERISTICS (FLIS)
PART NAME ASSIGNED BY CONTROLLING AGENCYFOAM FILL
LENGTH21.5 INCHES NOMINAL IN
THICKNESS5.0 INCHES NOMINAL IN
WIDTH16.5 INCHES NOMINAL IN
SHAPEHORIZONTAL RECTANGULAR
MATERIALPLASTIC FOAM CUSHIONING
VERIFIED SUBSTITUTES & CROSS-REFERENCES 16
10387408Interchangeable
interchangeable cross-reference
interchangeable
1825BLACKInterchangeable
interchangeable cross-reference
interchangeable
70A0203Interchangeable
interchangeable cross-reference
interchangeable
8401Interchangeable
interchangeable cross-reference
interchangeable
66TGInterchangeable
interchangeable cross-reference
interchangeable
32504Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is SP121FF?
SP121FF is a PAD,CUSHIONING.
What parts can replace SP121FF?
There are 16 known substitutes for SP121FF: 10387408, 1825BLACK, 70A0203 and 13 more. Substitute compatibility should be verified for your specific system.
What is the NSN for SP121FF?
SP121FF is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-01-629-9334. 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