The Shield,electron Tube, cataloged under National Stock Number 5960-00-925-3721, is classified within Federal Supply Class 5960 (Electron Tubes and Associated Hardware) of the Electrical and Electronic Equipment Components group. The manufacturer of record is Communications & Power Industries Llc Dba Cpi Div Microwave Power Products Division - Eimac Operations. Government technical data includes 10 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5960-00-925-3721 |
| Primary Part Number | SK306 |
| Item Name | Shield,electron Tube |
| FSC / FSG | 5960 / 59 — Electron Tubes and Associated Hardware |
| Manufacturer | Communications & Power Industries Llc Dba Cpi Div Microwave Power Products Division - Eimac Operations |
| Status | ACTIVE |
| Mounting Facility Type and Quantity | 8 UNTHREADED HOLE(S) SINGLE MOUNTING FACILITY |
| Tube Envelope Accommodated Maximum Diameter | 4.938 INCHES IN |
| Large End Diameter | 8.250 INCHES NOMINAL IN |
| Unthreaded Mounting Hole Diameter | 0.156 INCHES NOMINAL SINGLE MOUNTING FACILITY IN |
| Style Designator | CYLINDRICAL W/FLARED END |
| Accommodated Item Securing Device Type | FRICTION FASTENER |
| Small End Diameter | 4.891 INCHES NOMINAL IN |
| Bolt Circle Diameter | 7.750 INCHES NOMINAL SINGLE MOUNTING FACILITY SINGLE CENTER GROUP IN |
| Material | GLASS FIBER |
| Tube Accommodated Maximum Height | 3.625 INCHES IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| SK306 | Communications & Power Industries International Inc. Zweigniederlassung Ismaning (DEU) |
| SK306 PRIMARY | Communications & Power Industries Llc Dba Cpi Div Microwave Power Products Division - Eimac Operations (USA) |
| Reference | Meaning |
|---|---|
| 128C053H02 | C/1 Advisory reference — outside the item-of-supply concept U.S. Government activity |
NSN 5960-00-925-3721 is a Shield,electron Tube, manufactured by Communications & Power Industries Llc Dba Cpi Div Microwave Power Products Division - Eimac Operations, classified under FSC 5960, Electron Tubes and Associated Hardware. Status: active.
NSN 5960-00-925-3721 has 2 manufacturer part numbers on file: SK306 (Communications & Power Industries International Inc. Zweigniederlassung Ismaning), SK306 (Communications & Power Industries Llc Dba Cpi Div Microwave Power Products Division - Eimac Operations).
1 possible match (shared part number, not a government interchangeability claim): 5315-01-576-9908. Verify interchangeability with system specifications before substitution.
Key specifications for SK306: Mounting Facility Type and Quantity: 8 UNTHREADED HOLE(S) SINGLE MOUNTING FACILITY; Tube Envelope Accommodated Maximum Diameter: 4.938 INCHES IN; Large End Diameter: 8.250 INCHES NOMINAL IN; Unthreaded Mounting Hole Diameter: 0.156 INCHES NOMINAL SINGLE MOUNTING FACILITY IN. 10 specifications are documented in the U.S. Government catalog.
Possible hazard — SDS may be required (DLA HMIC P). Hazard information on this page is shown exactly as it appears in the DLA record.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.