PartsTable
Technical Data Sheet
PartsTable / COMPONENT / 20B
20B ✓ Verified by PartsTable
— · COMPONENT
WHAT YOU NEED TO KNOW
Verify manufacturer and server generation compatibility Check if Option PN or Spare PN — same part, different channel
Confirm exact part number — similar PNs may be different parts
PRODUCT OVERVIEW

The RETAINER,ELECTRON TUBE is a the manufacturer industrial component. Key specifications include shape: ROUND, length: 14.000 INCHES NOMINAL IN, material: IRON CAST HOUSING, base_style: TELEPHONE SLIDE NUMBER ONE, bulb_style: T (TUBULAR), current_type: DC. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 3030-00-080-8768, 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
20B
NSN: 3030-00-080-8768
FSC: 3030
CAGE: 25472 — GOODRICH CORPORATION (USA)
SPECIFICATIONS
shapeROUND
length14.000 INCHES NOMINAL IN
materialIRON CAST HOUSING
base_styleTELEPHONE SLIDE NUMBER ONE
bulb_styleT (TUBULAR)
current_typeDC
physical_formSTRAIGHT
overall_height2.375 INCHES NOMINAL IN
overall_length1.688 INCHES MAXIMUM IN
voltage_rating20.000 VOLTS NOMINAL
bulb_designatorT-2
outside_diameter0.156 INCHES NOMINAL IN
NSN3030-00-080-8768
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available RETAINER,ELECTRON TUBE TITLE COMPONENT PN 20B MFR RETAINER,ELECTRON TUBE
VERIFIED SUBSTITUTES & CROSS-REFERENCES 26
11242Interchangeable
interchangeable cross-reference
interchangeable
188-8Interchangeable
IBM 139GB 15k RPM SAS SFF-1 HDD
interchangeable
148099Interchangeable
interchangeable cross-reference
interchangeable
MS51957-30Interchangeable
interchangeable cross-reference
interchangeable
935.63.11.437Interchangeable
interchangeable cross-reference
interchangeable
330-3059-350Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 20B?
20B is a RETAINER,ELECTRON TUBE.
What parts can replace 20B?
There are 26 known substitutes for 20B: 11242, 188-8, 148099 and 23 more. Substitute compatibility should be verified for your specific system.
Is 20B still available?
20B is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026