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PartsTable / COMPONENT / A7421
A7421 ✓ 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 TELETYPEWRITER SUBASSEMBLY is a the manufacturer industrial component. Key specifications include material: STEEL CORROSION RESISTING, outside_diameter: 2.000 INCHES NOMINAL IN, style_designator: CIRCULAR, aperture_diameter: 1.766 INCHES NOMINAL IN, end_item_identification: PUMP,EXSTAR INTERNATIONAL CORP,MODEL 815; LOGISTICS SUPPORT VESSEL, cross-sectional_thickness: 0.094 INCHES NOMINAL IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-00-253-2469, 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
A7421
NSN: 5330-00-253-2469
FSC: 5330
CAGE: 80749 — UNITED SPECIALTIES CO (USA)
SPECIFICATIONS
materialSTEEL CORROSION RESISTING
outside_diameter2.000 INCHES NOMINAL IN
style_designatorCIRCULAR
aperture_diameter1.766 INCHES NOMINAL IN
end_item_identificationPUMP,EXSTAR INTERNATIONAL CORP,MODEL 815; LOGISTICS SUPPORT VESSEL
cross-sectional_thickness0.094 INCHES NOMINAL IN
cross-sectional_shape_styleSOLID SINGLE OR COMPOSITION
NSN5330-00-253-2469
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: A7421 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
•
CROSS-SECTIONAL THICKNESS: 0.094 INCHES NOMINAL IN
•
CROSS-SECTIONAL SHAPE STYLE: SOLID SINGLE OR COMPOSITION
•
OUTSIDE DIAMETER: 2.000 INCHES NOMINAL IN
•
STYLE DESIGNATOR: CIRCULAR
•
MATERIAL: COTTON OVERALL
•
APERTURE DIAMETER: 1.766 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
CROSS-SECTIONAL THICKNESS0.094 INCHES NOMINAL IN
CROSS-SECTIONAL SHAPE STYLESOLID SINGLE OR COMPOSITION
OUTSIDE DIAMETER2.000 INCHES NOMINAL IN
STYLE DESIGNATORCIRCULAR
MATERIALCOTTON OVERALL
APERTURE DIAMETER1.766 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 18
JHP33-128Interchangeable
interchangeable cross-reference
interchangeable
615A1Interchangeable
interchangeable cross-reference
interchangeable
615A121-009-93Interchangeable
interchangeable cross-reference
interchangeable
A7-42-1Interchangeable
interchangeable cross-reference
interchangeable
C9ZZ10094AInterchangeable
interchangeable cross-reference
interchangeable
Z99503LR1MVInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is A7421?
A7421 is a TELETYPEWRITER SUBASSEMBLY.
What parts can replace A7421?
There are 18 known substitutes for A7421: JHP33-128, 615A1, 615A121-009-93 and 15 more. Substitute compatibility should be verified for your specific system.
Is A7421 still available?
A7421 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