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MC21598 — BUMPER

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

MC21598: BUMPER.

The BUMPER is a the manufacturer industrial component. Key specifications include material: ALUMINUM ALLOY 2024, shank_length: 0.705 INCHES MINIMUM AND 0.708 INCHES MAXIMUM IN, overall_height: 0.885 INCHES MINIMUM AND 0.888 INCHES MAXIMUM IN, shank_diameter: 0.265 INCHES MINIMUM AND 0.275 INCHES MAXIMUM IN, style_designator: FLANGED, end_item_identification: NHA: VALVE,REGULATING,SY; V-22. This part is cataloged in the U.S.

Government catalog under NSN 5340-01-547-8040, 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
MC21598
NSN: 5340-01-547-8040
FSC: 5340 — Hardware, Commercial
CAGE: 76050 — EATON AEROSPACE LLC DBA STERER ENGINEERING DIV M.C.AEROSPACE (USA)
SPECIFICATIONS
materialALUMINUM ALLOY 2024
shank_length0.705 INCHES MINIMUM AND 0.708 INCHES MAXIMUM IN
overall_height0.885 INCHES MINIMUM AND 0.888 INCHES MAXIMUM IN
shank_diameter0.265 INCHES MINIMUM AND 0.275 INCHES MAXIMUM IN
style_designatorFLANGED
end_item_identificationNHA: VALVE,REGULATING,SY; V-22
outside/top_flange_diameter0.405 INCHES MINIMUM AND 0.415 INCHES MAXIMUM IN
criticality_code_justificationAGAV
material_document_and_classificationQQ-A-225/6 ASSN STD ALL MATERIAL RESPONSES
part_name_assigned_by_controlling_agencySTOP
NSN5340-01-547-8040
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: MC21598 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
•
SHANK DIAMETER: 0.265 INCHES MINIMUM AND 0.275 INCHES MAXIMUM IN
•
OUTSIDE/TOP FLANGE DIAMETER: 0.405 INCHES MINIMUM AND 0.415 INCHES MAXIMUM IN
•
SHANK LENGTH: 0.705 INCHES MINIMUM AND 0.708 INCHES MAXIMUM IN
•
CRITICALITY CODE JUSTIFICATION: AGAV
•
STYLE DESIGNATOR: FLANGED
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-A-225/6 ASSN STD ALL MATERIAL RESPONSES
TECHNICAL CHARACTERISTICS
SHANK DIAMETER0.265 INCHES MINIMUM AND 0.275 INCHES MAXIMUM IN
OVERALL HEIGHT0.885 INCHES MINIMUM AND 0.888 INCHES MAXIMUM IN
OUTSIDE/TOP FLANGE DIAMETER0.405 INCHES MINIMUM AND 0.415 INCHES MAXIMUM IN
SHANK LENGTH0.705 INCHES MINIMUM AND 0.708 INCHES MAXIMUM IN
CRITICALITY CODE JUSTIFICATIONAGAV
STYLE DESIGNATORFLANGED
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-A-225/6 ASSN STD ALL MATERIAL RESPONSES
PART NAME ASSIGNED BY CONTROLLING AGENCYSTOP
END ITEM IDENTIFICATIONNHA: VALVE,REGULATING,SY; V-22
MATERIALALUMINUM ALLOY 2024
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 MC21598?
MC21598 is a BUMPER.
What is the NSN for MC21598?
MC21598 is cataloged in the U.S. Government catalog under NSN 5340-01-547-8040. 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.