The Attenuator,variable, cataloged under National Stock Number 5985-00-034-0950, 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 Shallco, Inc. Government technical data includes 25 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5985-00-034-0950 |
| Primary Part Number | 6899-2 |
| Item Name | Attenuator,variable |
| FSC / FSG | 5985 / 59 — Antennas, Waveguides, and Related Equipment |
| Manufacturer | Shallco, Inc |
| Status | ACTIVE |
| Shaft Type | ROUND, FLATTED |
| Bushing Length | 0.375 INCHES NOMINAL IN |
| Impedance Rating in Ohms | 600.0 INPUT AND 11100.0 OUTPUT |
| Mounting Facility Type and Quantity | 1 THREADED BUSHING |
| Frequency Range | 0.000 GIGAHERTZ MINIMUM AND 130.000 GIGAHERTZ MAXIMUM |
| Shaft Diameter | 0.250 INCHES NOMINAL IN |
| Body Style | CYLINDRICAL W/REAR TERMINALS |
| Adjustment Device Type and Quantity | 1 SHAFT |
| Overall Diameter | 1.500 INCHES NOMINAL IN |
| First Flat Length | 0.312 INCHES NOMINAL IN |
| Overall Attenuation Range in Decibels | +0.0 TO 24.0 |
| Mounting Facility Screw Thread Series Designator | UNEF |
| Overall Attenuation Accuracy in Decibels | -4.80 TO 4.80 |
| Attenuation Per Step in Decibels | 2.0 |
| Attenuation Variation Method | STEPPED |
| Schematic Diagram Designator | UNBALANCED "PI" |
| Mounting Thread Quantity | 32 PER INCH |
| Shaft Length | 0.870 INCHES NOMINAL IN |
| Body Length | 2.000 INCHES NOMINAL IN |
| Mounting Facility Nominal Screw Thread Diameter | 0.375 INCHES IN |
| Operating Temp Range | -20.0 TO 160.0 FAHRENHEIT DEGF |
| Application Design | AUDIO |
| Terminal Type and Quantity | 3 TAB, SOLDER LUG |
| Step Position Quantity | 25 |
| Flat Height | 0.205 INCHES NOMINAL IN |
| 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 |
|---|---|
| 6899-2 | Shallco, Inc (USA) |
| Reference | Meaning |
|---|---|
| SMC423299 | 3/2 Design control — primary reference U.S. Government activity |
| SMC423299 | 5/9 Secondary reference Lockheed Martin Corporation Dba Lockheed Martin Div Lockheed Martin |
| 6899-2 | 5/9 Secondary reference Meggitt (new Hampshire), Inc |
NSN 5985-00-034-0950 is a Attenuator,variable, manufactured by Shallco, Inc, classified under FSC 5985, Antennas, Waveguides, and Related Equipment. Status: active.
NSN 5985-00-034-0950 has 1 manufacturer part number on file: 6899-2 (Shallco, Inc).
1 possible match (shared part number, not a government interchangeability claim): 5910-00-854-8849. Verify interchangeability with system specifications before substitution.
Key specifications for 6899-2: Shaft Type: ROUND, FLATTED; Bushing Length: 0.375 INCHES NOMINAL IN; Impedance Rating in Ohms: 600.0 INPUT AND 11100.0 OUTPUT; Mounting Facility Type and Quantity: 1 THREADED BUSHING. 25 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.