The Attenuator,fixed, cataloged under National Stock Number 5985-01-212-5631, 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 19 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5985-01-212-5631 |
| Primary Part Number | 50SP20N |
| Item Name | Attenuator,fixed |
| FSC / FSG | 5985 / 59 — Antennas, Waveguides, and Related Equipment |
| Manufacturer | Alan Industries Inc |
| Status | ACTIVE |
| FSC Application Data | COMMUNICATION EQUIPMENT |
| Frequency Range | 0.000 HERTZ MINIMUM AND 2.000 GIGAHERTZ MAXIMUM |
| Body Style | ROUND, TERMINAL/TERMINALS IN OPPOSITE SURFACE |
| Attenuation Accuracy Reference Frequency | 2.0 GIGAHERTZ |
| Overall Diameter | 0.780 INCHES MINIMUM AND 0.810 INCHES MAXIMUM IN |
| Voltage Standing Wave Ratio | 1.40 |
| Input Impedance Rating in Ohms | 50.0 |
| Mounting Method | CONNECTOR |
| Rf Signal Attenuation in Decibels | 20.0 |
| Attenuation Accuracy in Decibels | -1.00 TO 1.00 |
| Surface Treatment | PASSIVATE BODY |
| Operating Temp Range | -20.0 TO 125.0 CELSIUS DEGC |
| Voltage Standing Wave Ratio Frequency Range | +0.0 TO 2.0 GIGAHERTZ |
| Application Design | TRANSMISSION LINE |
| Material | STEEL CORROSION RESISTING BODY |
| Power Rating | 1.0 WATTS AVERAGE |
| Terminal Type and Quantity | 2 CONNECTOR |
| Output Impedance Rating in Ohms | 50.0 |
| Coaxial Connector Series Designation | N |
| 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 |
|---|---|
| 50SP20N PRIMARY | Alan Industries Inc (USA) |
| Reference | Meaning |
|---|---|
| 50P20NF | 5/9 Secondary reference Alan Industries Inc |
NSN 5985-01-212-5631 is a Attenuator,fixed, manufactured by Alan Industries Inc, classified under FSC 5985, Antennas, Waveguides, and Related Equipment. Status: active.
NSN 5985-01-212-5631 has 1 manufacturer part number on file: 50SP20N (Alan Industries Inc).
Key specifications for 50SP20N: FSC Application Data: COMMUNICATION EQUIPMENT; Frequency Range: 0.000 HERTZ MINIMUM AND 2.000 GIGAHERTZ MAXIMUM; Body Style: ROUND, TERMINAL/TERMINALS IN OPPOSITE SURFACE; Attenuation Accuracy Reference Frequency: 2.0 GIGAHERTZ. 19 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.