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Technical Data Sheet
A8903 ✓ 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 PACKING is a the manufacturer industrial component. Key specifications include diameter: 0.281 INCHES NOMINAL IN, material: STEEL BAND, overall_width: 0.500 INCHES NOMINAL IN, style_designator: SINGLE LOOP, tongue_hole_type: ROUND, UNTHREADED, surface_treatment: CADMIUM BAND. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-00-483-0310, 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
A8903
NSN: 5330-00-483-0310
FSC: 5330
CAGE: 14959 — CRANE CO DIV VALVE DIV (USA)
SPECIFICATIONS
diameter0.281 INCHES NOMINAL IN
materialSTEEL BAND
overall_width0.500 INCHES NOMINAL IN
style_designatorSINGLE LOOP
tongue_hole_typeROUND, UNTHREADED
surface_treatmentCADMIUM BAND
material_thickness0.047 INCHES NOMINAL IN
loop_inside_diameter0.750 INCHES NOMINAL IN
distance_from_loop_center_to_tongue_end1.063 INCHES NOMINAL IN
center_to_center_distance_between_loop_and_mounting_hole0.813 INCHES NOMINAL IN
NSN5330-00-483-0310
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: A8903 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
VERIFIED SUBSTITUTES & CROSS-REFERENCES 2
A8903Interchangeable
interchangeable cross-reference
interchangeable
8903Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is A8903?
A8903 is a PACKING.
What parts can replace A8903?
There are 2 known substitutes for A8903: A8903, 8903. Substitute compatibility should be verified for your specific system.
What is the NSN for A8903?
A8903 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-00-483-0310. This indicates validated use in U.S. government and defense supply chains.
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