The Attenuator,variable, cataloged under National Stock Number 5985-01-077-5990, 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 E and M Laboratories Div of Trak Microwave Corp. Government technical data includes 21 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5985-01-077-5990 |
| Primary Part Number | 560040-1 |
| Item Name | Attenuator,variable |
| FSC / FSG | 5985 / 59 — Antennas, Waveguides, and Related Equipment |
| Manufacturer | E and M Laboratories Div of Trak Microwave Corp |
| Status | ACTIVE |
| Insertion Loss at Minimum Attenuation in Maximum Decibels | 0.3 |
| Waveguide Flange Type | COVER |
| Mounting Facility Type and Quantity | 4 TERMINAL WITH MOUNTING HOLES |
| Frequency Range | 7.000 GIGAHERTZ MINIMUM AND 11.000 GIGAHERTZ MAXIMUM |
| Body Style | WAVEGUIDE TYPE |
| Mounting Facility Pattern | FOUR POSITION RECTANGULAR |
| Adjustment Device Type and Quantity | 1 KNOB |
| Center to Center Distance Between Mounting Facilities Parallel to Length | 1.340 INCHES NOMINAL IN |
| Overall Attenuation Range in Decibels | +0.0 TO 20.0 |
| Voltage Standing Wave Ratio | 1.25 |
| Waveguide Flange Designation | UG-1493/U |
| Scale Linearity | LINEAR |
| Attenuation Per Step in Decibels | 0.5 |
| Attenuation Variation Method | STEPPED |
| Scale Division Quantity | 100 |
| Vernier Scale Division Quantity | 10 |
| Center to Center Distance Between Mounting Facilities Parallel to Width | 1.340 INCHES NOMINAL IN |
| Application Design | WAVEGUIDE |
| Terminal Type and Quantity | 2 FLANGE |
| Power Rating | 1.0 WATTS AVERAGE AND 100.0 WATTS PEAK |
| Step Position Quantity | 10 |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL D — Destroy Item |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 560040-1 PRIMARY | E and M Laboratories Div of Trak Microwave Corp (USA) |
| Reference | Meaning |
|---|---|
| 723331-1 | 7/2 Vendor item drawing reference Raytheon Company Div Rmd Strategic |
NSN 5985-01-077-5990 is a Attenuator,variable, manufactured by E and M Laboratories Div of Trak Microwave Corp, classified under FSC 5985, Antennas, Waveguides, and Related Equipment. Status: active.
NSN 5985-01-077-5990 has 1 manufacturer part number on file: 560040-1 (E and M Laboratories Div of Trak Microwave Corp).
Key specifications for 560040-1: Insertion Loss at Minimum Attenuation in Maximum Decibels: 0.3; Waveguide Flange Type: COVER; Mounting Facility Type and Quantity: 4 TERMINAL WITH MOUNTING HOLES; Overall Height: 1.810 INCHES NOMINAL IN. 21 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.
NSN 5985-01-077-5990 has DEMIL Code D. Demilitarization may be required before disposal or transfer to non-military entities.
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.