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128976-03 — O-RING

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

128976-03: O-RING.

The O-RING is a the manufacturer industrial component. Key specifications include material: RUBBER SILICONE CLASS Q, center_hole_diameter: 10.795 INCHES MINIMUM AND 10.855 INCHES MAXIMUM IN, cross-sectional_height: 0.067 INCHES MINIMUM AND 0.077 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5331-01-033-2537, 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
128976-03
NSN: 5331-01-033-2537
FSC: 5331 — O-ring
CAGE: 0NKU0 — LCT ELECTRONICS (USA)
SPECIFICATIONS
materialRUBBER SILICONE CLASS Q
center_hole_diameter10.795 INCHES MINIMUM AND 10.855 INCHES MAXIMUM IN
cross-sectional_height0.067 INCHES MINIMUM AND 0.077 INCHES MAXIMUM IN
NSN5331-01-033-2537
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 128976-03 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 HEIGHT: 0.067 INCHES MINIMUM AND 0.077 INCHES MAXIMUM IN
•
CENTER HOLE DIAMETER: 10.795 INCHES MINIMUM AND 10.855 INCHES MAXIMUM IN
•
MATERIAL: RUBBER SILICONE CLASS Q
TECHNICAL CHARACTERISTICS
CROSS-SECTIONAL HEIGHT0.067 INCHES MINIMUM AND 0.077 INCHES MAXIMUM IN
CENTER HOLE DIAMETER10.795 INCHES MINIMUM AND 10.855 INCHES MAXIMUM IN
MATERIALRUBBER SILICONE CLASS Q
OTHER ITEMS IN FSC 5331 — O-ring
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5331-00-001-1971 5331-00-001-1979 5331-00-001-3904 5331-00-001-3905 5331-00-001-3906 5331-00-001-3908 5331-00-001-3923 5331-00-001-3924
SUBSTITUTES & CROSS-REFERENCES 1
128910 ITEM 11Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 128976-03?
128976-03 is a O-RING.
What parts can replace 128976-03?
There is 1 known substitute for 128976-03: 128910 ITEM 11. Substitute compatibility should be verified for your specific system.
What is the NSN for 128976-03?
128976-03 is cataloged in the U.S. Government catalog under NSN 5331-01-033-2537. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.