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Technical Data Sheet
PartsTable / COMPONENT / MS27990-6C
MS27990-6C ✓ Verified by PartsTable
— · ORING SEAL
WHAT YOU NEED TO KNOW
Material determines chemical compatibility Standard durometer is 70 Shore A
Wrong material = catastrophic seal failure
PRODUCT OVERVIEW

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: 120.000 INCHES NOMINAL IN, overall_diameter: 0.248 INCHES MINIMUM AND 0.250 INCHES MAXIMUM IN, surface_treatment: PASSIVATE OVERALL. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-00-926-5332, 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
MS27990-6C
NSN: 5340-00-926-5332
FSC: 5340
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_length120.000 INCHES NOMINAL IN
overall_diameter0.248 INCHES MINIMUM AND 0.250 INCHES MAXIMUM IN
surface_treatmentPASSIVATE OVERALL
NSN5340-00-926-5332
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: MS27990-6C 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
•
OVERALL DIAMETER: 0.248 INCHES MINIMUM AND 0.250 INCHES MAXIMUM IN
•
CHAMFER LENGTH: 0.015 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN
•
SURFACE TREATMENT: PASSIVATE OVERALL
TECHNICAL CHARACTERISTICS (FLIS)
OVERALL DIAMETER0.248 INCHES MINIMUM AND 0.250 INCHES MAXIMUM IN
CHAMFER LENGTH0.015 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN
OVERALL LENGTH120.000 INCHES NOMINAL IN
SURFACE TREATMENTPASSIVATE OVERALL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 4
MS35831-6DUpgraded Successor
successor cross-reference
successor
A-A-55596Upgraded Successor
successor cross-reference
successor
AA55596BUpgraded Successor
successor cross-reference
successor
MIL-H-9850Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is MS27990-6C?
MS27990-6C is a ROD,STRAIGHT,HEADLESS.
What parts can replace MS27990-6C?
There are 4 known substitutes for MS27990-6C: MS35831-6D, A-A-55596, AA55596B and 1 more. Substitute compatibility should be verified for your specific system.
What is the NSN for MS27990-6C?
MS27990-6C is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-00-926-5332. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026