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OS7-09N-A02-253 — RING,WEARING

✓ Government record, cited
— · COMPONENT
PRODUCT OVERVIEW

OS7-09N-A02-253: RING,WEARING.

The RING,WEARING is a the manufacturer industrial component. Key specifications include material: COPPER ALLOY, body_style: PLAIN, corner_shape: SQUARE ALL CORNERS, overall_length: 1.000 INCHES NOMINAL IN, surface_finish: 125.0 MICROINCHES ALL SURFACES, body_inside_diameter: 3.257 INCHES MINIMUM AND 3.258 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 4320-00-989-7699, 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
OS7-09N-A02-253
NSN: 4320-00-989-7699
FSC: 4320 — Power and Hand Pumps
CAGE: 10941 — CARVER PUMP COMPANY (USA)
SPECIFICATIONS
materialCOPPER ALLOY
body_stylePLAIN
corner_shapeSQUARE ALL CORNERS
overall_length1.000 INCHES NOMINAL IN
surface_finish125.0 MICROINCHES ALL SURFACES
body_inside_diameter3.257 INCHES MINIMUM AND 3.258 INCHES MAXIMUM IN
body_outside_diameter3.645 INCHES MINIMUM AND 3.646 INCHES MAXIMUM IN
NSN4320-00-989-7699
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available RING,WEARING TITLE COMPONENT PN OS7-09N-A02-253 MFR RING,WEARING
KEY FEATURES
•
SURFACE FINISH: 125.0 MICROINCHES ALL SURFACES
•
CORNER SHAPE: SQUARE ALL CORNERS
•
BODY STYLE: PLAIN
•
BODY OUTSIDE DIAMETER: 3.645 INCHES MINIMUM AND 3.646 INCHES MAXIMUM IN
•
BODY INSIDE DIAMETER: 3.257 INCHES MINIMUM AND 3.258 INCHES MAXIMUM IN
•
MATERIAL: COPPER ALLOY
TECHNICAL CHARACTERISTICS
SURFACE FINISH125.0 MICROINCHES ALL SURFACES
CORNER SHAPESQUARE ALL CORNERS
BODY STYLEPLAIN
BODY OUTSIDE DIAMETER3.645 INCHES MINIMUM AND 3.646 INCHES MAXIMUM IN
OVERALL LENGTH1.000 INCHES NOMINAL IN
BODY INSIDE DIAMETER3.257 INCHES MINIMUM AND 3.258 INCHES MAXIMUM IN
MATERIALCOPPER ALLOY
SUBSTITUTES & CROSS-REFERENCES 3
A1 1-4YL180A10SReference document
Same NSN cross-reference
Reference document — Secondary reference
A1 1/4YL180A-1Reference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
A-007-09N-A-02-Reference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
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 OS7-09N-A02-253?
OS7-09N-A02-253 is a RING,WEARING.
What parts can replace OS7-09N-A02-253?
There are 3 known substitutes for OS7-09N-A02-253: A1 1-4YL180A10S, A1 1/4YL180A-1, A-007-09N-A-02-. Substitute compatibility should be verified for your specific system.
What is the NSN for OS7-09N-A02-253?
OS7-09N-A02-253 is cataloged in the U.S. Government catalog under NSN 4320-00-989-7699. 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.