PartsTable
Technical Data Sheet
AC1921 ✓ 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 GASKET is a the manufacturer industrial component. Key specifications include material: ASBESTOS OVERALL, hole_diameter: 0.281 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN, overall_width: 1.750 INCHES NOMINAL IN, aperture_width: 1.250 INCHES NOMINAL IN, overall_length: 2.438 INCHES NOMINAL IN, aperture_length: 1.938 INCHES NOMINAL IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-00-254-5678, 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
AC1921
NSN: 5330-00-254-5678
FSC: 5330
CAGE: 35301 — DRESSER INDUSTRIES INC LEROI DIV (USA)
SPECIFICATIONS
materialASBESTOS OVERALL
hole_diameter0.281 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN
overall_width1.750 INCHES NOMINAL IN
aperture_width1.250 INCHES NOMINAL IN
overall_length2.438 INCHES NOMINAL IN
aperture_length1.938 INCHES NOMINAL IN
style_designatorNON-CIRCULAR
bolt_hole_quantity4
outside_corner_radius0.062 INCHES NOMINAL IN
cross-sectional_thickness0.031 INCHES NOMINAL IN
cross-sectional_shape_styleSOLID SINGLE OR COMPOSITION
inside_corner_inverted_radius0.281 INCHES NOMINAL IN
NSN5330-00-254-5678
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: AC1921 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
STYLE DESIGNATOR: NON-CIRCULAR
MATERIAL: ASBESTOS OVERALL
BOLT HOLE QUANTITY: 4
OUTSIDE EDGE TO BOLT HOLE CENTER DISTANCE ALONG WIDTH: 0.250 INCHES NOMINAL IN
APERTURE LENGTH: 1.938 INCHES NOMINAL IN
INSIDE CORNER INVERTED RADIUS: 0.281 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
STYLE DESIGNATORNON-CIRCULAR
MATERIALASBESTOS OVERALL
BOLT HOLE QUANTITY4
OVERALL WIDTH1.750 INCHES NOMINAL IN
OUTSIDE EDGE TO BOLT HOLE CENTER DISTANCE ALONG WIDTH0.250 INCHES NOMINAL IN
APERTURE LENGTH1.938 INCHES NOMINAL IN
OVERALL LENGTH2.438 INCHES NOMINAL IN
INSIDE CORNER INVERTED RADIUS0.281 INCHES NOMINAL IN
OUTSIDE EDGE TO BOLT HOLE CENTER DISTANCE ALONG LENGTH0.250 INCHES NOMINAL IN
CROSS-SECTIONAL THICKNESS0.031 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 19
942Interchangeable
interchangeable cross-reference
interchangeable
750024-1Interchangeable
interchangeable cross-reference
interchangeable
512571Interchangeable
interchangeable cross-reference
interchangeable
17222Interchangeable
interchangeable cross-reference
interchangeable
915Interchangeable
interchangeable cross-reference
interchangeable
ANSI C18.1MInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is AC1921?
AC1921 is a GASKET.
What parts can replace AC1921?
There are 19 known substitutes for AC1921: 942, 750024-1, 512571 and 16 more. Substitute compatibility should be verified for your specific system.
Is AC1921 still available?
AC1921 is currently cancelled.
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