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12421 ✓ 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 GUIDE,PLUNGER is a the manufacturer industrial component. Key specifications include end_item_identification: F22. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-00-179-2109, 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
12421
NSN: 5330-00-179-2109
FSC: 5330
CAGE: 80201 — SKF USA INC. DBA SKF AEROSPACE SEALING SOLUTIONS (USA)
SPECIFICATIONS
end_item_identificationF22
NSN5330-00-179-2109
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 12421 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
•
SEAL WIDTH: 0.297 INCHES MINIMUM AND 0.328 INCHES MAXIMUM IN
•
SEALING ELEMENT STYLE: ANGULAR
•
HOUSING BORE DIAMETER: 1.249 INCHES MINIMUM AND 1.251 INCHES MAXIMUM IN
•
ACCOMMODATED SHAFT DIAMETER: 0.656 INCHES NOMINAL IN
•
MATERIAL: STEEL CASE
•
CASE STYLE: SQUARE
•
ACCOMMODATED SHAFT MAXIMUM RATED SPEED: 2000 FEET PER MINUTE FT
TECHNICAL CHARACTERISTICS (FLIS)
SEAL WIDTH0.297 INCHES MINIMUM AND 0.328 INCHES MAXIMUM IN
SEALING ELEMENT STYLEANGULAR
HOUSING BORE DIAMETER1.249 INCHES MINIMUM AND 1.251 INCHES MAXIMUM IN
ACCOMMODATED SHAFT DIAMETER0.656 INCHES NOMINAL IN
MATERIALSTEEL CASE
CASE STYLESQUARE
MATERIALLEATHER SEALING ELEMENT
ACCOMMODATED SHAFT MAXIMUM RATED SPEED2000 FEET PER MINUTE FT
VERIFIED SUBSTITUTES & CROSS-REFERENCES 9
B107.400Interchangeable
interchangeable cross-reference
interchangeable
GGG-H-86Interchangeable
interchangeable cross-reference
interchangeable
B107.400 CAT 54 TY1Interchangeable
interchangeable cross-reference
interchangeable
1549789PT2Interchangeable
interchangeable cross-reference
interchangeable
421-8Interchangeable
interchangeable cross-reference
interchangeable
H104 1-2Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 12421?
12421 is a GUIDE,PLUNGER.
What parts can replace 12421?
There are 9 known substitutes for 12421: B107.400, GGG-H-86, B107.400 CAT 54 TY1 and 6 more. Substitute compatibility should be verified for your specific system.
Is 12421 still available?
12421 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