The Attenuator,variable, cataloged under National Stock Number 5985-01-377-8645, 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 Lockheed Martin Corporation Div Rotary and Mission Systems. Government technical data includes 21 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5985-01-377-8645 |
| Primary Part Number | 20000474P1 |
| Item Name | Attenuator,variable |
| FSC / FSG | 5985 / 59 — Antennas, Waveguides, and Related Equipment |
| Manufacturer | Lockheed Martin Corporation Div Rotary and Mission Systems |
| Status | ACTIVE |
| Insertion Loss at Minimum Attenuation in Maximum Decibels | 0.5 |
| Mounting Facility Type and Quantity | 4 UNTHREADED HOLE(S) |
| Frequency Range | 0.000 HERTZ MINIMUM AND 20.000 MEGAHERTZ MAXIMUM |
| Body Style | COAXIAL TYPE |
| Attenuation Accuracy Reference Frequency | 20.0 MEGAHERTZ |
| Mounting Facility Pattern | FOUR POSITION RECTANGULAR |
| Adjustment Device Type and Quantity | 1 ELECTRONIC, PROGRAMMABLE |
| Center to Center Distance Between Mounting Facilities Parallel to Length | 2.436 INCHES NOMINAL IN |
| Overall Attenuation Range in Decibels | +0.0 TO 7.0 |
| Voltage Standing Wave Ratio | 1.30 |
| Unthreaded Mounting Hole Diameter | 0.156 INCHES NOMINAL IN |
| Overall Attenuation Accuracy in Decibels | -0.25 TO 0.25 |
| Attenuation Per Step in Decibels | 1.0 AND 2.0 AND 4.0 |
| Attenuation Variation Method | STEPPED |
| Operating Temp Range | -18.0 TO 45.0 CELSIUS DEGC |
| Center to Center Distance Between Mounting Facilities Parallel to Width | 0.768 INCHES NOMINAL IN |
| Application Design | TRANSMISSION LINE |
| Terminal Type and Quantity | 2 CONNECTOR, COAXIAL, FEMALE |
| Power Rating | 0.5 WATTS AVERAGE |
| Step Position Quantity | 3 |
| Coaxial Connector Series Designation | SMA |
| 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 |
|---|---|
| 20000474P1 PRIMARY | Lockheed Martin Corporation Div Rotary and Mission Systems (USA) |
| 50MDA7-1186 | Alan Industries Inc (USA) |
| Reference | Meaning |
|---|---|
| 20000474P1 | 5/9 Secondary reference Lockheed Martin Corporation Dba Lockheed Martin Simulation Training & Support |
NSN 5985-01-377-8645 is a Attenuator,variable, manufactured by Lockheed Martin Corporation Div Rotary and Mission Systems, classified under FSC 5985, Antennas, Waveguides, and Related Equipment. Status: active.
NSN 5985-01-377-8645 has 2 manufacturer part numbers on file: 20000474P1 (Lockheed Martin Corporation Div Rotary and Mission Systems), 50MDA7-1186 (Alan Industries Inc).
Key specifications for 20000474P1: Insertion Loss at Minimum Attenuation in Maximum Decibels: 0.5; Mounting Facility Type and Quantity: 4 UNTHREADED HOLE(S); Overall Height: 1.000 INCHES NOMINAL IN; Frequency Range: 0.000 HERTZ MINIMUM AND 20.000 MEGAHERTZ MAXIMUM. 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.
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.