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C458-976 — RETAINER,ELECTRON TUBE

✓ Government record, cited
— · COMPONENT
PRODUCT OVERVIEW

C458-976: RETAINER,ELECTRON TUBE.

The RETAINER,ELECTRON TUBE is a the manufacturer industrial component. Key specifications include material: STEEL, overall_height: 0.625 INCHES NOMINAL IN, inside_diameter: 1.337 INCHES MINIMUM AND 1.377 INCHES MAXIMUM IN, style_designator: DOUBLE FOOT, SCREW CLAMP, surface_treatment: PASSIVATE, mounting_slot_width: 0.125 INCHES NOMINAL SINGLE MOUNTING FACILITY IN. This part is cataloged in the U.S.

Government catalog under NSN 5960-00-581-9717, 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
C458-976
NSN: 5960-00-581-9717
FSC: 5960 — Electron Tubes and Associated Hardware
CAGE: 26916 — NORTHROP GRUMMAN SYSTEMS CORPORATION DBA NORTHROP GRUMMAN SYSTEMS CORP DIV MULTIPLE (USA)
SPECIFICATIONS
materialSTEEL
overall_height0.625 INCHES NOMINAL IN
inside_diameter1.337 INCHES MINIMUM AND 1.377 INCHES MAXIMUM IN
style_designatorDOUBLE FOOT, SCREW CLAMP
surface_treatmentPASSIVATE
mounting_slot_width0.125 INCHES NOMINAL SINGLE MOUNTING FACILITY IN
mounting_slot_length0.250 INCHES NOMINAL SINGLE MOUNTING FACILITY IN
mounting_facility_type_and_quantity2 SLOT SINGLE MOUNTING FACILITY
accommodated_item_securing_device_typeCLAMP
electron_tube_base_accommodated_diameter+1.337 TO 1.377 INCHES IN
distance_between_mounting_facility_centers1.922 INCHES NOMINAL SINGLE MOUNTING FACILITY SINGLE CENTER GROUP IN
distance_from_retainer_center_to_centerline_of_mounting_facility0.969 INCHES NOMINAL IN
NSN5960-00-581-9717
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available RETAINER,ELECTRON TUBE TITLE COMPONENT PN C458-976 MFR RETAINER,ELECTRON TUBE
KEY FEATURES
•
MOUNTING FACILITY TYPE AND QUANTITY: 2 SLOT SINGLE MOUNTING FACILITY
•
DISTANCE FROM RETAINER CENTER TO CENTERLINE OF MOUNTING FACILITY: 0.969 INCHES NOMINAL IN
•
MOUNTING SLOT LENGTH: 0.250 INCHES NOMINAL SINGLE MOUNTING FACILITY IN
•
DISTANCE FROM RETAINER CENTER TO MOUNTING FACILITY CENTER AT LOOP TIGHTENING DEVICE: 0.953 INCHES NOMINAL IN
•
STYLE DESIGNATOR: DOUBLE FOOT, SCREW CLAMP
•
ACCOMMODATED ITEM SECURING DEVICE TYPE: CLAMP
•
DISTANCE BETWEEN MOUNTING FACILITY CENTERS: 1.922 INCHES NOMINAL SINGLE MOUNTING FACILITY SINGLE CENTER GROUP IN
TECHNICAL CHARACTERISTICS
MOUNTING FACILITY TYPE AND QUANTITY2 SLOT SINGLE MOUNTING FACILITY
OVERALL HEIGHT0.625 INCHES NOMINAL IN
DISTANCE FROM RETAINER CENTER TO CENTERLINE OF MOUNTING FACILITY0.969 INCHES NOMINAL IN
MOUNTING SLOT LENGTH0.250 INCHES NOMINAL SINGLE MOUNTING FACILITY IN
DISTANCE FROM RETAINER CENTER TO MOUNTING FACILITY CENTER AT LOOP TIGHTENING DEVICE0.953 INCHES NOMINAL IN
STYLE DESIGNATORDOUBLE FOOT, SCREW CLAMP
ACCOMMODATED ITEM SECURING DEVICE TYPECLAMP
DISTANCE BETWEEN MOUNTING FACILITY CENTERS1.922 INCHES NOMINAL SINGLE MOUNTING FACILITY SINGLE CENTER GROUP IN
INSIDE DIAMETER1.337 INCHES MINIMUM AND 1.377 INCHES MAXIMUM IN
ELECTRON TUBE BASE ACCOMMODATED DIAMETER+1.337 TO 1.377 INCHES IN
OTHER ITEMS IN FSC 5960 — Electron Tubes and Associated Hardware
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5960-00-001-1620 5960-00-001-1632 5960-00-001-2995 5960-00-001-2997 5960-00-001-3039 5960-00-001-3099 5960-00-001-4686 5960-00-001-7279
SUBSTITUTES & CROSS-REFERENCES 2
CWS458-976Reference document
Same NSN cross-reference
Reference document — Secondary reference
42X200937Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Terminal item — stock exhausted; no further procurementNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is C458-976?
C458-976 is a RETAINER,ELECTRON TUBE.
What parts can replace C458-976?
There are 2 known substitutes for C458-976: CWS458-976, 42X200937. Substitute compatibility should be verified for your specific system.
What is the NSN for C458-976?
C458-976 is cataloged in the U.S. Government catalog under NSN 5960-00-581-9717. This indicates validated use in U.S. government and defense supply chains.
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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.