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MS27990-2C — ROD,STRAIGHT,HEADLESS

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

MS27990-2C: ROD,STRAIGHT,HEADLESS.

The ROD,STRAIGHT,HEADLESS is a the manufacturer industrial component. Key specifications include chamfer_length: 0.015 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN, overall_length: 96.000 INCHES NOMINAL IN, overall_diameter: 0.089 INCHES MINIMUM AND 0.091 INCHES MAXIMUM IN, surface_treatment: PASSIVATE OVERALL. This part is cataloged in the U.S.

Government catalog under NSN 5340-00-069-1974, 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
MS27990-2C
NSN: 5340-00-069-1974
FSC: 5340 — Hardware, Commercial
CAGE: 96906 — MILITARY STANDARDS PROMULGATED BY MILITARY DEPARTMENTS UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M
SPECIFICATIONS
chamfer_length0.015 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN
overall_length96.000 INCHES NOMINAL IN
overall_diameter0.089 INCHES MINIMUM AND 0.091 INCHES MAXIMUM IN
surface_treatmentPASSIVATE OVERALL
NSN5340-00-069-1974
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: MS27990-2C 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
•
CHAMFER LENGTH: 0.015 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN
•
OVERALL DIAMETER: 0.089 INCHES MINIMUM AND 0.091 INCHES MAXIMUM IN
•
SURFACE TREATMENT: PASSIVATE OVERALL
TECHNICAL CHARACTERISTICS
CHAMFER LENGTH0.015 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN
OVERALL DIAMETER0.089 INCHES MINIMUM AND 0.091 INCHES MAXIMUM IN
OVERALL LENGTH96.000 INCHES NOMINAL IN
SURFACE TREATMENTPASSIVATE OVERALL
SUBSTITUTES & CROSS-REFERENCES 4
MS27990-10CReference document
Same NSN cross-reference
Reference document — Secondary reference
A-A-55590Reference document
Same NSN cross-reference
Reference document — Identification reference
AA55590-8CSame NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
S121873-091-4-4Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is MS27990-2C?
MS27990-2C is a ROD,STRAIGHT,HEADLESS.
What parts can replace MS27990-2C?
There are 4 known substitutes for MS27990-2C: MS27990-10C, A-A-55590, AA55590-8C and 1 more. Substitute compatibility should be verified for your specific system.
What is the NSN for MS27990-2C?
MS27990-2C is cataloged in the U.S. Government catalog under NSN 5340-00-069-1974. 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.