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21890 ✓ 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 MICROCIRCUIT,DIGITAL is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, body_width: 0.265 INCHES MINIMUM AND 0.291 INCHES MAXIMUM IN, case_style: SQUARE, head_style: FLAT CHAMFER, seal_width: 0.454 INCHES MINIMUM AND 0.484 INCHES MAXIMUM IN, body_length: 0.880 INCHES MINIMUM AND 0.920 INCHES MAXIMUM IN. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-00-066-1269, 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
21890
NSN: 5330-00-066-1269
FSC: 5330
CAGE: 80201 — SKF USA INC. DBA SKF AEROSPACE SEALING SOLUTIONS (USA)
SPECIFICATIONS
materialSTEEL OVERALL
body_width0.265 INCHES MINIMUM AND 0.291 INCHES MAXIMUM IN
case_styleSQUARE
head_styleFLAT CHAMFER
seal_width0.454 INCHES MINIMUM AND 0.484 INCHES MAXIMUM IN
body_length0.880 INCHES MINIMUM AND 0.920 INCHES MAXIMUM IN
head_height0.154 INCHES NOMINAL IN
point_styleFLAT
temp_rating-65.0 FAHRENHEIT AND 225.0 FAHRENHEIT DEGF
bit_quantity4096
point_length1.082 INCHES NOMINAL IN
thread_class2A A
NSN5330-00-066-1269
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 21890 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
•
CASE STYLE: SQUARE
•
TEMP RATING: -65.0 FAHRENHEIT AND 225.0 FAHRENHEIT DEGF
•
MATERIAL: STEEL CASE
•
SURFACE TREATMENT: PLASTIC CASE
•
ACCOMMODATED SHAFT DIAMETER: 2.188 INCHES NOMINAL IN
•
OUTSIDE DIAMETER: 3.355 INCHES NOMINAL IN
•
HOUSING BORE DIAMETER: 3.350 INCHES NOMINAL IN
•
SEALING ELEMENT STYLE: ANGULAR
TECHNICAL CHARACTERISTICS (FLIS)
CASE STYLESQUARE
TEMP RATING-65.0 FAHRENHEIT AND 225.0 FAHRENHEIT DEGF
MATERIALSTEEL CASE
SURFACE TREATMENTPLASTIC CASE
ACCOMMODATED SHAFT DIAMETER2.188 INCHES NOMINAL IN
OUTSIDE DIAMETER3.355 INCHES NOMINAL IN
HOUSING BORE DIAMETER3.350 INCHES NOMINAL IN
SEALING ELEMENT STYLEANGULAR
SEAL WIDTH0.454 INCHES MINIMUM AND 0.484 INCHES MAXIMUM IN
ACCOMMODATED SHAFT MAXIMUM RATED SPEED2000 FEET PER MINUTE FT
VERIFIED SUBSTITUTES & CROSS-REFERENCES 20
A2045PC42Interchangeable
interchangeable cross-reference
interchangeable
A1061PC42Interchangeable
interchangeable cross-reference
interchangeable
A1025PC42Interchangeable
interchangeable cross-reference
interchangeable
967C314-2Interchangeable
interchangeable cross-reference
interchangeable
3ABInterchangeable
interchangeable cross-reference
interchangeable
PLGA2810010AInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 21890?
21890 is a MICROCIRCUIT,DIGITAL.
What parts can replace 21890?
There are 20 known substitutes for 21890: A2045PC42, A1061PC42, A1025PC42 and 17 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 21890?
21890 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-00-066-1269. 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