PartsTable
Technical Data Sheet
PartsTable / O-RING / 90305-7
90305-7 ✓ 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 MICROCIRCUIT,MEMORY is a the manufacturer memory module engineered for enterprise server and workstation platforms requiring validated, high-reliability memory. Key specifications include material: RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR, outside_diameter: 2.730 INCHES MINIMUM AND 2.782 INCHES MAXIMUM IN, special_features: ESD;ALTERED ITEMS 67268/5962-8851503RX OR 14933/5962-8506503RX, memory_device_type: PAL, center_hole_diameter: 2.540 INCHES MINIMUM AND 2.560 INCHES MAXIMUM IN, operating_temp_range: -55.0 TO 125.0 CELSIUS DEGC. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5331-00-527-8522, 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
90305-7
NSN: 5331-00-527-8522
FSC: 5331 — O-RING
CAGE: 34228 — L3 TECHNOLOGIES, INC. DIV L3 KEO (USA)
SPECIFICATIONS
materialRUBBER BUTADIENE-ACRYLONITRILE CLASS NBR
outside_diameter2.730 INCHES MINIMUM AND 2.782 INCHES MAXIMUM IN
special_featuresESD;ALTERED ITEMS 67268/5962-8851503RX OR 14933/5962-8506503RX
memory_device_typePAL
center_hole_diameter2.540 INCHES MINIMUM AND 2.560 INCHES MAXIMUM IN
operating_temp_range-55.0 TO 125.0 CELSIUS DEGC
cross-sectional_height0.100 INCHES MINIMUM AND 0.106 INCHES MAXIMUM IN
end_item_identificationPACER DAWN
inclosure_configurationDUAL-IN-LINE
terminal_type_and_quantity20 PRINTED CIRCUIT
criticality_code_justificationFEAT
case_outline_source_and_designatorD-8 MIL-M-38510
NSN5331-00-527-8522
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 90305-7 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
•
MATERIAL: RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR
•
CROSS-SECTIONAL HEIGHT: 0.100 INCHES MINIMUM AND 0.106 INCHES MAXIMUM IN
•
OUTSIDE DIAMETER: 2.730 INCHES MINIMUM AND 2.782 INCHES MAXIMUM IN
•
CENTER HOLE DIAMETER: 2.540 INCHES MINIMUM AND 2.560 INCHES MAXIMUM IN
TYPICAL APPLICATIONS
  • Server memory expansion for virtualization workloads
  • Database performance optimization (in-memory computing)
  • VDI and remote desktop session hosting
  • High-performance computing (HPC) clusters
  • Mail server and collaboration platform scaling
  • Application server tier expansion
TECHNICAL CHARACTERISTICS (FLIS)
MATERIALRUBBER BUTADIENE-ACRYLONITRILE CLASS NBR
CROSS-SECTIONAL HEIGHT0.100 INCHES MINIMUM AND 0.106 INCHES MAXIMUM IN
OUTSIDE DIAMETER2.730 INCHES MINIMUM AND 2.782 INCHES MAXIMUM IN
CENTER HOLE DIAMETER2.540 INCHES MINIMUM AND 2.560 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 23
13998Interchangeable
interchangeable cross-reference
interchangeable
2-145 N674-70Interchangeable
interchangeable cross-reference
interchangeable
P40409Interchangeable
interchangeable cross-reference
interchangeable
AS568B-145Interchangeable
interchangeable cross-reference
interchangeable
142-363Interchangeable
interchangeable cross-reference
interchangeable
1452Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 90305-7?
90305-7 is a MICROCIRCUIT,MEMORY.
What parts can replace 90305-7?
There are 23 known substitutes for 90305-7: 13998, 2-145 N674-70, P40409 and 20 more. Substitute compatibility should be verified for your specific system.
Is 90305-7 still available?
90305-7 is currently cancelled.
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Last verified: July 2026