The Attenuator,variable, cataloged under National Stock Number 5985-00-020-2990, 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 Rlc Electronics, Inc. Government technical data includes 15 specifications, cited from the U.S. Government catalog. The record lists 4 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5985-00-020-2990 |
| Primary Part Number | A4349A |
| Item Name | Attenuator,variable |
| FSC / FSG | 5985 / 59 — Antennas, Waveguides, and Related Equipment |
| Manufacturer | Rlc Electronics, Inc |
| Status | ACTIVE |
| Impedance Rating in Ohms | 50.0 INPUT-OUTPUT |
| Mounting Facility Type and Quantity | 1 THREADED BUSHING |
| Frequency Range | 0.000 GIGAHERTZ MINIMUM AND 400.000 GIGAHERTZ MAXIMUM |
| Overall Diameter | 4.500 INCHES NOMINAL IN |
| Overall Attenuation Range in Decibels | +0.0 TO 60.0 |
| Mounting Facility Screw Thread Series Designator | UNF |
| Overall Attenuation Accuracy in Decibels | -0.25 TO 0.25 |
| Attenuation Per Step in Decibels | 6.0 |
| Attenuation Variation Method | STEPPED |
| Mounting Thread Quantity | 32 PER INCH |
| Mounting Facility Nominal Screw Thread Diameter | 0.190 INCHES IN |
| Application Design | TRANSMISSION LINE |
| Power Rating | 1.0 WATTS AVERAGE |
| Step Position Quantity | 10 |
| Coaxial Connector Series Designation | N |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL D — Destroy Item |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| A4349A | Rlc Electronics, Inc (USA) |
| 50CV100-849 | Alan Industries Inc (USA) |
| VA112-6 | Smiths Interconnect Americas, Inc. (USA) |
| AT21-12F | Rlc Electronics, Inc (USA) |
| Reference | Meaning |
|---|---|
| AT-104-F | 5/9 Secondary reference Singer Co the Instrumentation Div |
| AT 104 F | 5/9 Secondary reference Singer Co the |
| CN-764/U | 3/2 Design control — primary reference U.S. Government activity |
NSN 5985-00-020-2990 is a Attenuator,variable, manufactured by Rlc Electronics, Inc, classified under FSC 5985, Antennas, Waveguides, and Related Equipment. Status: active.
NSN 5985-00-020-2990 has 4 manufacturer part numbers on file: A4349A (Rlc Electronics, Inc), 50CV100-849 (Alan Industries Inc), VA112-6 (Smiths Interconnect Americas, Inc.), AT21-12F (Rlc Electronics, Inc).
Key specifications for A4349A: Impedance Rating in Ohms: 50.0 INPUT-OUTPUT; Mounting Facility Type and Quantity: 1 THREADED BUSHING; Frequency Range: 0.000 GIGAHERTZ MINIMUM AND 400.000 GIGAHERTZ MAXIMUM; Overall Diameter: 4.500 INCHES NOMINAL IN. 15 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 5985-00-020-2990 has DEMIL Code D. 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.