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28121 — FILTER ELEMENT,INTAKE AIR CLEANE

✓ Government record, cited
— · MRO · MRO_GENERAL
PRODUCT OVERVIEW

28121: FILTER ELEMENT,INTAKE AIR CLEANE.

FILTER ELEMENT,INTAKE AIR CLEANE. Key specifications include height: 0.718 INCHES NOMINAL IN, diameter: 0.680 INCHES NOMINAL IN, material: PAPER FILTERING MEDIUM, case_style: SQUARE, head_style: FLAT COUNTERSUNK, joint_type: SCARF-PERIPHERAL TOP RING. This part is cataloged in the U.S.

Government catalog under NSN 5330-00-225-9122, 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
MRO→ MRO_GENERAL→ 28121
NSN: 5330-00-225-9122
NIINs: 002259122, 004205796, 004760840, 010143335, 011581462, 011987875, 014114876, 014247703, 016827141
FSC: 5330 — Packing and Gasket Materials
CAGE: 10988 — CNH INDUSTRIAL AMERICA LLC DBA CNH AMERICA (USA)
SPECIFICATIONS
height0.718 INCHES NOMINAL IN
diameter0.680 INCHES NOMINAL IN
materialPAPER FILTERING MEDIUM
case_styleSQUARE
head_styleFLAT COUNTERSUNK
joint_typeSCARF-PERIPHERAL TOP RING
seal_width0.250 INCHES NOMINAL IN
design_typeNONREUSABLE
temp_rating-65.0 FAHRENHEIT AND 250.0 FAHRENHEIT DEGF
venier_scaleNOT INCLUDED
body_diameter5.703 INCHES MINIMUM AND 5.718 INCHES MAXIMUM IN
overall_height4.000 INCHES NOMINAL IN
NSN5330-00-225-9122
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 28121 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
•
INTERMEDIATE RING QUANTITY: 3
•
OUTSIDE DIAMETER: 2.500 INCHES NOMINAL IN
•
CROSS-SECTIONAL SHAPE STYLE: U INTERMEDIATE RING
•
INSIDE DIAMETER: 2.000 INCHES NOMINAL IN
•
HEIGHT: 0.718 INCHES NOMINAL IN
•
MATERIAL: ASBESTOS OR RUBBER SYNTHETIC OR COTTON INTERMEDIATE RING
•
JOINT TYPE: SCARF-PERIPHERAL TOP RING
TECHNICAL CHARACTERISTICS
INTERMEDIATE RING QUANTITY3
OUTSIDE DIAMETER2.500 INCHES NOMINAL IN
CROSS-SECTIONAL SHAPE STYLEU INTERMEDIATE RING
INSIDE DIAMETER2.000 INCHES NOMINAL IN
HEIGHT0.718 INCHES NOMINAL IN
MATERIALASBESTOS OR RUBBER SYNTHETIC OR COTTON INTERMEDIATE RING
JOINT TYPESCARF-PERIPHERAL TOP RING
JOINT TYPESCARF-PERIPHERAL INTERMEDIATE RING
JOINT TYPESCARF-PERIPHERAL BOTTOM RING
SUBSTITUTES & CROSS-REFERENCES 1
173074Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 28121?
28121 is a FILTER ELEMENT,INTAKE AIR CLEANE. It is classified as a MRO (MRO_GENERAL).
What parts can replace 28121?
There is 1 known substitute for 28121: 173074. Substitute compatibility should be verified for your specific system.
What is the NSN for 28121?
28121 is cataloged in the U.S. Government catalog under NSN 5330-00-225-9122. This indicates validated use in U.S. government and defense supply chains.
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