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Technical Data Sheet
PartsTable / O-RING / AS568-128/MIL-G-21569 CL I
AS568-128/MIL-G-21569 CL I ✓ 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 AS568-128/MIL-G-21569 CL I is a the manufacturer industrial component. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5331-00-111-3747, 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
AS568-128/MIL-G-21569 CL I
NSN: 5331-00-111-3747
FSC: 5331 — O-RING
CAGE: 0U583 — SAE INTERNATIONAL DBA SAE INTERNATIONAL (USA)
SPECIFICATIONS
Part NumberAS568-128/MIL-G-21569 CL I
NSN5331-00-111-3747
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: AS568-128/MIL-G-21569 CL I 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
•
MATERIAL: RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR
•
CENTER HOLE DIAMETER: 1.475 INCHES MINIMUM AND 1.499 INCHES MAXIMUM IN
•
CROSS-SECTIONAL HEIGHT: 0.100 INCHES MINIMUM AND 0.106 INCHES MAXIMUM IN
•
TEMP RATING: -30.0 FAHRENHEIT AND 250.0 FAHRENHEIT DEGF
•
OUTSIDE DIAMETER: 1.675 INCHES MINIMUM AND 1.711 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS (FLIS)
MATERIALRUBBER BUTADIENE-ACRYLONITRILE CLASS NBR
CENTER HOLE DIAMETER1.475 INCHES MINIMUM AND 1.499 INCHES MAXIMUM IN
CROSS-SECTIONAL HEIGHT0.100 INCHES MINIMUM AND 0.106 INCHES MAXIMUM IN
TEMP RATING-30.0 FAHRENHEIT AND 250.0 FAHRENHEIT DEGF
OUTSIDE DIAMETER1.675 INCHES MINIMUM AND 1.711 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 21
5122883Interchangeable
interchangeable cross-reference
interchangeable
33454Interchangeable
interchangeable cross-reference
interchangeable
33454 REV 0 FIND 3Interchangeable
interchangeable cross-reference
interchangeable
14039-1Interchangeable
interchangeable cross-reference
interchangeable
273505760051355Interchangeable
interchangeable cross-reference
interchangeable
14038-1Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is AS568-128/MIL-G-21569 CL I?
AS568-128/MIL-G-21569 CL I is a AS568-128/MIL-G-21569 CL I.
What parts can replace AS568-128/MIL-G-21569 CL I?
There are 21 known substitutes for AS568-128/MIL-G-21569 CL I: 5122883, 33454, 33454 REV 0 FIND 3 and 18 more. Substitute compatibility should be verified for your specific system.
Is AS568-128/MIL-G-21569 CL I still available?
AS568-128/MIL-G-21569 CL I 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