The Attenuator,variable, cataloged under National Stock Number 5985-01-039-8439, 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 Alan Industries Inc. Government technical data includes 18 specifications, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5985-01-039-8439 |
| Primary Part Number | 50V100-028 |
| Item Name | Attenuator,variable |
| FSC / FSG | 5985 / 59 — Antennas, Waveguides, and Related Equipment |
| Manufacturer | Alan Industries Inc |
| Status | ACTIVE |
| Shaft Type | ROUND |
| Insertion Loss at Minimum Attenuation in Maximum Decibels | 0.4 |
| Frequency Range | 1250.000 MEGAHERTZ MINIMUM AND 1350.000 MEGAHERTZ MAXIMUM |
| Shaft Diameter | 0.250 INCHES NOMINAL IN |
| Body Style | COAXIAL TYPE |
| Adjustment Device Type and Quantity | 1 SHAFT |
| Overall Attenuation Range in Decibels | +0.0 TO 100.0 |
| Voltage Standing Wave Ratio | 1.20 AND 1.00 |
| Overall Attenuation Accuracy in Decibels | -0.80 TO 0.80 |
| Attenuation Per Step in Decibels | 10.0 |
| Attenuation Variation Method | STEPPED |
| Shaft Length | 0.750 INCHES NOMINAL IN |
| Operating Temp Range | -20.0 TO 125.0 CELSIUS DEGC |
| Application Design | TRANSMISSION LINE |
| Terminal Type and Quantity | 2 CONNECTOR, COAXIAL, FEMALE |
| Power Rating | 0.5 WATTS AVERAGE |
| Step Position Quantity | 10 |
| Coaxial Connector Series Designation | SMA |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL B — Remove Demilitarization Key Points |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 142C711H01 | Northrop Grumman Support Services Corp (USA) |
| MDC2017SA-64 | Dal-Tech Devices, Inc. Dba Dal-Tech Devices Inc Div Dal-Tec Devices, Inc (USA) |
| 50V100-028 PRIMARY | Alan Industries Inc (USA) |
| Reference | Meaning |
|---|---|
| 142C711H01 | 5/9 Secondary reference U.S. Government activity |
| 50V100W | 5/9 Secondary reference Alan Industries Inc |
| 50V100-028 | C/1 Advisory reference — outside the item-of-supply concept Racon Corp |
NSN 5985-01-039-8439 is a Attenuator,variable, manufactured by Alan Industries Inc, classified under FSC 5985, Antennas, Waveguides, and Related Equipment. Status: active.
NSN 5985-01-039-8439 has 3 manufacturer part numbers on file: 142C711H01 (Northrop Grumman Support Services Corp), MDC2017SA-64 (Dal-Tech Devices, Inc. Dba Dal-Tech Devices Inc Div Dal-Tec Devices, Inc), 50V100-028 (Alan Industries Inc).
Key specifications for 50V100-028: Shaft Type: ROUND; Insertion Loss at Minimum Attenuation in Maximum Decibels: 0.4; Overall Height: 2.200 INCHES NOMINAL IN; Frequency Range: 1250.000 MEGAHERTZ MINIMUM AND 1350.000 MEGAHERTZ MAXIMUM. 18 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 5985-01-039-8439 has DEMIL Code B. 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.