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PartsTable / COMPONENT / A55R1
A55R1 ✓ 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 RETAINER,PACKING is a the manufacturer industrial component. Key specifications include angle: 30.0 DEGREES NOMINAL, material: COPPER ALLOY OVERALL, peripheral_diameter: 1.000 INCHES NOMINAL IN, center_hole_diameter: 0.438 INCHES MINIMUM AND 0.439 INCHES MAXIMUM IN, fsc_application_data: WASHER,PHOTOGRAPHIC PRINT, cross-sectional_height: 0.625 INCHES NOMINAL IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-00-202-4549, 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
A55R1
NSN: 5330-00-202-4549
FSC: 5330
CAGE: 1Z473 — PAKON INC DBA IMPAK DIVISION (USA)
SPECIFICATIONS
angle30.0 DEGREES NOMINAL
materialCOPPER ALLOY OVERALL
peripheral_diameter1.000 INCHES NOMINAL IN
center_hole_diameter0.438 INCHES MINIMUM AND 0.439 INCHES MAXIMUM IN
fsc_application_dataWASHER,PHOTOGRAPHIC PRINT
cross-sectional_height0.625 INCHES NOMINAL IN
cross-sectional_shape_styleFLANGE
flanged_body_outside_diameter0.750 INCHES NOMINAL IN
NSN5330-00-202-4549
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: A55R1 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
•
PERIPHERAL DIAMETER: 1.000 INCHES NOMINAL IN
•
CROSS-SECTIONAL SHAPE STYLE: FLANGE
•
CENTER HOLE DIAMETER: 0.438 INCHES MINIMUM AND 0.439 INCHES MAXIMUM IN
•
MATERIAL: COPPER ALLOY OVERALL
•
FLANGED BODY OUTSIDE DIAMETER: 0.750 INCHES NOMINAL IN
•
CROSS-SECTIONAL HEIGHT: 0.625 INCHES NOMINAL IN
•
ANGLE: 30.0 DEGREES NOMINAL
•
FSC APPLICATION DATA: WASHER,PHOTOGRAPHIC PRINT
TECHNICAL CHARACTERISTICS (FLIS)
PERIPHERAL DIAMETER1.000 INCHES NOMINAL IN
CROSS-SECTIONAL SHAPE STYLEFLANGE
CENTER HOLE DIAMETER0.438 INCHES MINIMUM AND 0.439 INCHES MAXIMUM IN
MATERIALCOPPER ALLOY OVERALL
FLANGED BODY OUTSIDE DIAMETER0.750 INCHES NOMINAL IN
CROSS-SECTIONAL HEIGHT0.625 INCHES NOMINAL IN
ANGLE30.0 DEGREES NOMINAL
FSC APPLICATION DATAWASHER,PHOTOGRAPHIC PRINT
VERIFIED SUBSTITUTES & CROSS-REFERENCES 15
20-282Interchangeable
interchangeable cross-reference
interchangeable
257-4281Interchangeable
interchangeable cross-reference
interchangeable
257-7813Interchangeable
interchangeable cross-reference
interchangeable
336A121Interchangeable
interchangeable cross-reference
interchangeable
N-807-67Interchangeable
interchangeable cross-reference
interchangeable
B-232-0-03Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is A55R1?
A55R1 is a RETAINER,PACKING.
What parts can replace A55R1?
There are 15 known substitutes for A55R1: 20-282, 257-4281, 257-7813 and 12 more. Substitute compatibility should be verified for your specific system.
Is A55R1 still available?
A55R1 is currently cancelled.
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Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
Last verified: July 2026