The Attenuator,variable, cataloged under National Stock Number 5985-00-993-1378, is classified within Federal Supply Class 5985 (Antennas, Waveguides, and Related Equipment) of the Electrical and Electronic Equipment Components group. The manufacturer of record is International Business Machines Corp Parts Order Center Dept E - 54. Government technical data includes 13 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5985-00-993-1378 |
| Primary Part Number | 6055828 |
| Item Name | Attenuator,variable |
| FSC / FSG | 5985 / 59 — Antennas, Waveguides, and Related Equipment |
| Manufacturer | International Business Machines Corp Parts Order Center Dept E - 54 |
| Status | ACTIVE |
| Mounting Facility Type and Quantity | 4 TERMINAL WITH MOUNTING HOLES |
| Frequency Range | 8.200 GIGAHERTZ MINIMUM AND 12.400 GIGAHERTZ MAXIMUM |
| Body Style | WAVEGUIDE TYPE |
| Mounting Facility Pattern | FOUR POSITION RECTANGULAR |
| Adjustment Device Type and Quantity | 2 PUSHBUTTON |
| Center to Center Distance Between Mounting Facilities Parallel to Length | 1.290 INCHES NOMINAL IN |
| Overall Attenuation Range in Decibels | +0.5 TO 20.0 |
| Unthreaded Mounting Hole Diameter | 0.156 INCHES NOMINAL IN |
| Attenuation Variation Method | CONTINUOUS |
| Center to Center Distance Between Mounting Facilities Parallel to Width | 1.218 INCHES NOMINAL IN |
| Application Design | WAVEGUIDE |
| Terminal Type and Quantity | 2 FLANGE |
| Power Rating | 500.0 MILLIWATTS AVERAGE |
| 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 |
|---|---|
| 6055828 | International Business Machines Corp Parts Order Center Dept E - 54 (USA) |
| 6055828 | Lockheed Martin Corporation Div Rotary and Mission Systems (USA) |
| Reference | Meaning |
|---|---|
| 6055828 | 5/9 Secondary reference International Business Machines Corporation Dba IBM |
| 730S | 3/2 Design control — primary reference U.S. Government activity |
NSN 5985-00-993-1378 is a Attenuator,variable, manufactured by International Business Machines Corp Parts Order Center Dept E - 54, classified under FSC 5985, Antennas, Waveguides, and Related Equipment. Status: active.
NSN 5985-00-993-1378 has 2 manufacturer part numbers on file: 6055828 (International Business Machines Corp Parts Order Center Dept E - 54), 6055828 (Lockheed Martin Corporation Div Rotary and Mission Systems).
Key specifications for 6055828: Mounting Facility Type and Quantity: 4 TERMINAL WITH MOUNTING HOLES; Overall Height: 1.625 INCHES NOMINAL IN; Frequency Range: 8.200 GIGAHERTZ MINIMUM AND 12.400 GIGAHERTZ MAXIMUM; Body Style: WAVEGUIDE TYPE. 13 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.