The Attenuator,variable, cataloged under National Stock Number 5985-00-433-3550, 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 Systems Corporation Dba Electronic Systems. Government technical data includes 16 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5985-00-433-3550 |
| Primary Part Number | 990C421H01 |
| Item Name | Attenuator,variable |
| FSC / FSG | 5985 / 59 — Antennas, Waveguides, and Related Equipment |
| Manufacturer | Northrop Grumman Systems Corporation Dba Electronic Systems |
| Status | ACTIVE |
| Insertion Loss at Minimum Attenuation in Maximum Decibels | 0.5 |
| Mounting Facility Type and Quantity | 4 THREADED HOLE(S) |
| FSC Application Data | ANTENNAS,WAVEGUIDES AND RELATED EQUIP. |
| Frequency Range | 7.700 GIGAHERTZ MINIMUM AND 7.900 GIGAHERTZ MAXIMUM |
| Body Style | COAXIAL TYPE |
| Mounting Facility Pattern | THREE POSITION CIRCULAR |
| Adjustment Device Type and Quantity | 1 KNOB |
| Overall Attenuation Range in Decibels | +0.0 TO 50.0 |
| Mounting Facility Screw Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| Attenuation Variation Method | CONTINUOUS |
| Mounting Thread Quantity | 32 PER INCH |
| Body Material | ALUMINUM |
| Mounting Facility Nominal Screw Thread Diameter | 0.138 INCHES IN |
| Application Design | TRANSMISSION LINE |
| Terminal Type and Quantity | 2 CONNECTOR, COAXIAL, FEMALE |
| Coaxial Connector Series Designation | N |
| 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 |
|---|---|
| 990C421H01 PRIMARY | Northrop Grumman Systems Corporation Dba Electronic Systems (USA) |
| 6684-50G | Antenna & Radome Research Associates Corp Dba Arra Inc Div Arra Inc (USA) |
NSN 5985-00-433-3550 is a Attenuator,variable, manufactured by Northrop Grumman Systems Corporation Dba Electronic Systems, classified under FSC 5985, Antennas, Waveguides, and Related Equipment. Status: active.
NSN 5985-00-433-3550 has 2 manufacturer part numbers on file: 990C421H01 (Northrop Grumman Systems Corporation Dba Electronic Systems), 6684-50G (Antenna & Radome Research Associates Corp Dba Arra Inc Div Arra Inc).
Key specifications for 990C421H01: Insertion Loss at Minimum Attenuation in Maximum Decibels: 0.5; Mounting Facility Type and Quantity: 4 THREADED HOLE(S); Overall Height: 2.340 INCHES NOMINAL IN; FSC Application Data: ANTENNAS,WAVEGUIDES AND RELATED EQUIP.. 16 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 5985-00-433-3550 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.