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1A55S ✓ 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: 0.406 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN, overall_width: 3.188 INCHES NOMINAL IN, outside_corner_radius: 0.406 INCHES NOMINAL IN, cross-sectional_thickness: 0.250 INCHES NOMINAL IN, cross-sectional_shape_style: SOLID SINGLE OR COMPOSITION. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-00-353-7807, 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
1A55S
NSN: 5330-00-353-7807
FSC: 5330
CAGE: 71500 — ACF INDUSTRIES INC CARTER CARBURETOR DIV
SPECIFICATIONS
materialASBESTOS OVERALL
hole_diameter0.406 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN
overall_width3.188 INCHES NOMINAL IN
outside_corner_radius0.406 INCHES NOMINAL IN
cross-sectional_thickness0.250 INCHES NOMINAL IN
cross-sectional_shape_styleSOLID SINGLE OR COMPOSITION
side_radius_from_gasket_center1.000 INCHES NOMINAL IN
material_document_and_classificationE1.3,FSCM 71500 MFR REF SINGLE MATERIAL RESPONSE OVERALL
NSN5330-00-353-7807
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 1A55S 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
•
OUTSIDE CORNER RADIUS: 0.406 INCHES NOMINAL IN
•
CROSS-SECTIONAL SHAPE STYLE: SOLID SINGLE OR COMPOSITION
•
HOLE DIAMETER: 0.406 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: E1.3,FSCM 71500 MFR REF SINGLE MATERIAL RESPONSE OVERALL
•
MATERIAL: ASBESTOS OVERALL
•
SIDE RADIUS FROM GASKET CENTER: 1.000 INCHES NOMINAL IN
•
CROSS-SECTIONAL THICKNESS: 0.250 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
OUTSIDE CORNER RADIUS0.406 INCHES NOMINAL IN
CROSS-SECTIONAL SHAPE STYLESOLID SINGLE OR COMPOSITION
HOLE DIAMETER0.406 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN
MATERIAL DOCUMENT AND CLASSIFICATIONE1.3,FSCM 71500 MFR REF SINGLE MATERIAL RESPONSE OVERALL
MATERIALASBESTOS OVERALL
OVERALL WIDTH3.188 INCHES NOMINAL IN
SIDE RADIUS FROM GASKET CENTER1.000 INCHES NOMINAL IN
CROSS-SECTIONAL THICKNESS0.250 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 17
PA437Interchangeable
interchangeable cross-reference
interchangeable
9445Interchangeable
interchangeable cross-reference
interchangeable
DM-136Interchangeable
interchangeable cross-reference
interchangeable
9056Interchangeable
interchangeable cross-reference
interchangeable
PNS136-6PC2Interchangeable
interchangeable cross-reference
interchangeable
PNS136-22PC2Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 1A55S?
1A55S is a GASKET.
What parts can replace 1A55S?
There are 17 known substitutes for 1A55S: PA437, 9445, DM-136 and 14 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 1A55S?
1A55S is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-00-353-7807. 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