The Attenuator,fixed, cataloged under National Stock Number 5985-01-381-8451, 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 Northrop Grumman Support Services Corp. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5985-01-381-8451 |
| Primary Part Number | 583R947H54 |
| Item Name | Attenuator,fixed |
| FSC / FSG | 5985 / 59 — Antennas, Waveguides, and Related Equipment |
| Manufacturer | Northrop Grumman Support Services Corp |
| Status | ACTIVE |
| Frequency Range | 0.000 HERTZ MINIMUM AND 12.000 GIGAHERTZ MAXIMUM |
| Body Style | RECTANGULAR TERMINAL/TERMINALS ON THREE SURFACES |
| Precious Material | GOLD AND PLATINUM |
| Voltage Standing Wave Ratio | 1.30 |
| Mounting Method | TERMINAL |
| Rf Signal Attenuation in Decibels | 10.0 |
| Attenuation Accuracy in Decibels | -0.05 TO 0.05 |
| Precious Material and Location | TAB AND CONTACT SURFACES GOLD AND TAB AND CONTACT SURFACES PLATINUM |
| Operating Temp Range | -55.0 TO 125.0 CELSIUS DEGC |
| Voltage Standing Wave Ratio Frequency Range | +0.0 TO 12.0 GIGAHERTZ |
| Application Design | TRANSMISSION LINE |
| Power Rating | 0.5 WATTS AVERAGE AND 100.0 WATTS PEAK |
| Terminal Type and Quantity | 3 TAB, SOLDER LUG |
| 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 |
|---|---|
| 583R947H54 | Smiths Interconnect Americas, Inc. (USA) |
| 583R947H54 PRIMARY | Northrop Grumman Support Services Corp (USA) |
| Reference | Meaning |
|---|---|
| 583R947H54 | 3/9 Design control — primary reference U.S. Government activity |
NSN 5985-01-381-8451 is a Attenuator,fixed, manufactured by Northrop Grumman Support Services Corp, classified under FSC 5985, Antennas, Waveguides, and Related Equipment. Status: active.
NSN 5985-01-381-8451 has 2 manufacturer part numbers on file: 583R947H54 (Smiths Interconnect Americas, Inc.), 583R947H54 (Northrop Grumman Support Services Corp).
Key specifications for 583R947H54: Overall Height: 0.035 INCHES NOMINAL IN; Frequency Range: 0.000 HERTZ MINIMUM AND 12.000 GIGAHERTZ MAXIMUM; Body Style: RECTANGULAR TERMINAL/TERMINALS ON THREE SURFACES; Precious Material: GOLD AND PLATINUM. 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.