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R28593 — RETAINER,HELICAL COMPRESSION SPR

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

R28593: RETAINER,HELICAL COMPRESSION SPR.

RETAINER,HELICAL COMPRESSION SPR. Key specifications include material: ALUMINUM ALLOY, overall_height: 1.280 INCHES NOMINAL IN, flange_diameter: 3.000 INCHES NOMINAL IN, flange_thickness: 0.220 INCHES NOMINAL IN, style_designator: PARALLEL, end_hole_diameter: 0.520 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5340-01-236-8939, 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
R28593
NSN: 5340-01-236-8939
FSC: 5340 — Hardware, Commercial
CAGE: 75160 — DEERE & CO (USA)
SPECIFICATIONS
materialALUMINUM ALLOY
overall_height1.280 INCHES NOMINAL IN
flange_diameter3.000 INCHES NOMINAL IN
flange_thickness0.220 INCHES NOMINAL IN
style_designatorPARALLEL
end_hole_diameter0.520 INCHES NOMINAL IN
mounting_hole_diameter0.170 INCHES NOMINAL IN
NSN5340-01-236-8939
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: R28593 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
•
FLANGE DIAMETER: 3.000 INCHES NOMINAL IN
•
FLANGE THICKNESS: 0.220 INCHES NOMINAL IN
•
STYLE DESIGNATOR: PARALLEL
•
MOUNTING HOLE DIAMETER: 0.170 INCHES NOMINAL IN
•
MATERIAL: ALUMINUM ALLOY
•
END HOLE DIAMETER: 0.520 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
FLANGE DIAMETER3.000 INCHES NOMINAL IN
OVERALL HEIGHT1.280 INCHES NOMINAL IN
FLANGE THICKNESS0.220 INCHES NOMINAL IN
STYLE DESIGNATORPARALLEL
MOUNTING HOLE DIAMETER0.170 INCHES NOMINAL IN
MATERIALALUMINUM ALLOY
END HOLE DIAMETER0.520 INCHES NOMINAL IN
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

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Terminal item — stock exhausted; no further procurementNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is R28593?
R28593 is a RETAINER,HELICAL COMPRESSION SPR.
What is the NSN for R28593?
R28593 is cataloged in the U.S. Government catalog under NSN 5340-01-236-8939. 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.