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120589-2 — CAP,PROTECTIVE,DUST AND MOISTURE

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

120589-2: CAP,PROTECTIVE,DUST AND MOISTURE.

CAP,PROTECTIVE,DUST AND MOISTURE. Key specifications include material: STEEL, design_type: FRICTION, overall_diameter: 3.812 INCHES NOMINAL IN, special_features: STEERING CAP-LANDING GEAR-FWD AND AFT MK 105, surface_treatment: PASSIVATE, end_item_identification: MK 105 MAIN FL. This part is cataloged in the U.S.

Government catalog under NSN 5340-01-571-7233, 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
120589-2
NSN: 5340-01-571-7233
FSC: 5340 — Hardware, Commercial
CAGE: 1LJG7 — DMR CONSULTING, INC. DBA DMR CONSULTING INC (USA)
SPECIFICATIONS
materialSTEEL
design_typeFRICTION
overall_diameter3.812 INCHES NOMINAL IN
special_featuresSTEERING CAP-LANDING GEAR-FWD AND AFT MK 105
surface_treatmentPASSIVATE
end_item_identificationMK 105 MAIN FL
material_document_and_classificationAMS 5643 ASSN STD ALL MATERIAL RESPONSES
part_name_assigned_by_controlling_agencyCAP
tube_outside_diameter_for_which_designed2.750 INCHES NOMINAL IN
opening_inside_diameter_for_which_designed2.441 INCHES NOMINAL IN
NSN5340-01-571-7233
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 120589-2 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: FRICTION
•
OVERALL DIAMETER: 3.812 INCHES NOMINAL IN
•
TUBE OUTSIDE DIAMETER FOR WHICH DESIGNED: 2.750 INCHES NOMINAL IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: AMS 5643 ASSN STD ALL MATERIAL RESPONSES
•
OPENING INSIDE DIAMETER FOR WHICH DESIGNED: 2.441 INCHES NOMINAL IN
•
SURFACE TREATMENT: PASSIVATE
TECHNICAL CHARACTERISTICS
DESIGN TYPEFRICTION
OVERALL DIAMETER3.812 INCHES NOMINAL IN
TUBE OUTSIDE DIAMETER FOR WHICH DESIGNED2.750 INCHES NOMINAL IN
MATERIAL DOCUMENT AND CLASSIFICATIONAMS 5643 ASSN STD ALL MATERIAL RESPONSES
OPENING INSIDE DIAMETER FOR WHICH DESIGNED2.441 INCHES NOMINAL IN
SPECIAL FEATURESSTEERING CAP-LANDING GEAR-FWD AND AFT MK 105
SURFACE TREATMENTPASSIVATE
PART NAME ASSIGNED BY CONTROLLING AGENCYCAP
END ITEM IDENTIFICATIONMK 105 MAIN FL
MATERIALSTEEL
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: Normally procured from the manufacturer (OEM)Demilitarization required — mutilation
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FREQUENTLY ASKED QUESTIONS
What is 120589-2?
120589-2 is a CAP,PROTECTIVE,DUST AND MOISTURE.
What is the NSN for 120589-2?
120589-2 is cataloged in the U.S. Government catalog under NSN 5340-01-571-7233. 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.