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CM-28953-3 — PLUG,PROTECTIVE,DUST AND MOISTUR

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

CM-28953-3: PLUG,PROTECTIVE,DUST AND MOISTUR.

PLUG,PROTECTIVE,DUST AND MOISTUR. Key specifications include material: ALUMINUM, drive_type: SERRATED, design_type: THREADED, thread_class: 1A A, overall_diameter: 0.875 INCHES NOMINAL IN, features_provided: GASKET. This part is cataloged in the U.S.

Government catalog under NSN 5340-00-768-4074, 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
CM-28953-3
NSN: 5340-00-768-4074
FSC: 5340 — Hardware, Commercial
CAGE: 0EGF1 — CMP HYDRAULICS INC. (USA)
SPECIFICATIONS
materialALUMINUM
drive_typeSERRATED
design_typeTHREADED
thread_class1A A
overall_diameter0.875 INCHES NOMINAL IN
features_providedGASKET
surface_treatmentANODIZE
thread_size_and_series/type_designator7/16-20 UNF
NSN5340-00-768-4074
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: CM-28953-3 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
•
DESIGN TYPE: THREADED
•
OVERALL DIAMETER: 0.875 INCHES NOMINAL IN
•
DRIVE TYPE: SERRATED
•
FEATURES PROVIDED: GASKET
•
SURFACE TREATMENT: ANODIZE
•
THREAD CLASS: 1A A
•
MATERIAL: ALUMINUM
•
THREAD SIZE AND SERIES/TYPE DESIGNATOR: 7/16-20 UNF
TECHNICAL CHARACTERISTICS
DESIGN TYPETHREADED
OVERALL DIAMETER0.875 INCHES NOMINAL IN
DRIVE TYPESERRATED
FEATURES PROVIDEDGASKET
SURFACE TREATMENTANODIZE
THREAD CLASS1A A
MATERIALALUMINUM
THREAD SIZE AND SERIES/TYPE DESIGNATOR7/16-20 UNF
OTHER ITEMS IN FSC 5340 — Hardware, Commercial
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5340-00-000-0068 5340-00-000-0132 5340-00-000-8150 5340-00-001-1251 5340-00-001-1264 5340-00-001-1265 5340-00-001-1266 5340-00-001-1275
SUBSTITUTES & CROSS-REFERENCES 1
28953-3Same 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 CM-28953-3?
CM-28953-3 is a PLUG,PROTECTIVE,DUST AND MOISTUR.
What parts can replace CM-28953-3?
There is 1 known substitute for CM-28953-3: 28953-3. Substitute compatibility should be verified for your specific system.
What is the NSN for CM-28953-3?
CM-28953-3 is cataloged in the U.S. Government catalog under NSN 5340-00-768-4074. 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.