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SD2789 — CUP,COMPRESSION

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

SD2789: CUP,COMPRESSION.

The CUP,COMPRESSION is a the manufacturer industrial component. Key specifications include material: RUBBER OVERALL, center_hole_diameter: 7.000 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5340-00-361-3079, 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
SD2789
NSN: 5340-00-361-3079
FSC: 5340 — Hardware, Commercial
CAGE: 35311 — AMERICAN STANDARD INC WESTINGHOUSE AIR BRAKE CO DIV (USA)
SPECIFICATIONS
materialRUBBER OVERALL
center_hole_diameter7.000 INCHES NOMINAL IN
end_item_identificationW/S:CRANE, WHL, MTD; TRUCK, FORKLIFT, ROUGH TERRAIN, 6000 LB (5ID); TRUCK, FL (M10A); SHIPBOARD MATERIAL HANDLING EQUIPMENT (MHE) LBS
NSN5340-00-361-3079
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: SD2789 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
•
CENTER HOLE DIAMETER: 7.000 INCHES NOMINAL IN
•
MATERIAL: RUBBER OVERALL
TECHNICAL CHARACTERISTICS
CENTER HOLE DIAMETER7.000 INCHES NOMINAL IN
END ITEM IDENTIFICATIONW/S:CRANE, WHL, MTD; TRUCK, FORKLIFT, ROUGH TERRAIN, 6000 LB (5ID); TRUCK, FL (M10A); SHIPBOARD MATERIAL HANDLING EQUIPMENT (MHE) LBS
MATERIALRUBBER OVERALL
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 4
40PC4Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
165716Reference document
Same NSN cross-reference
Reference document — Secondary reference
AD1777Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
165716H1Same 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 SD2789?
SD2789 is a CUP,COMPRESSION.
What parts can replace SD2789?
There are 4 known substitutes for SD2789: 40PC4, 165716, AD1777 and 1 more. Substitute compatibility should be verified for your specific system.
What is the NSN for SD2789?
SD2789 is cataloged in the U.S. Government catalog under NSN 5340-00-361-3079. 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.