The Attenuator,variable, cataloged under National Stock Number 5985-00-258-5171, 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 Kontron Europe Gmbh. Government technical data includes 23 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 8 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5985-00-258-5171 |
| Primary Part Number | C89-570 |
| Item Name | Attenuator,variable |
| FSC / FSG | 5985 / 59 — Antennas, Waveguides, and Related Equipment |
| Manufacturer | Kontron Europe Gmbh |
| Status | ACTIVE |
| Insertion Loss at Minimum Attenuation in Maximum Decibels | 6.0 |
| Impedance Rating in Ohms | 50.0 INPUT-OUTPUT |
| Mounting Facility Type and Quantity | 4 THREADED HOLE(S) |
| Frequency Range | 950.000 MEGAHERTZ MINIMUM AND 1.250 GIGAHERTZ MAXIMUM |
| Body Style | COAXIAL TYPE |
| Mounting Facility Pattern | FOUR POSITION RECTANGULAR |
| Adjustment Device Type and Quantity | 1 KNOB |
| Center to Center Distance Between Mounting Facilities Parallel to Length | 4.218 INCHES NOMINAL IN |
| Overall Attenuation Range in Decibels | +6.0 TO 66.0 |
| Voltage Standing Wave Ratio | 1.50 |
| Mounting Facility Screw Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| Overall Attenuation Accuracy in Decibels | -2.00 TO 2.00 |
| Attenuation Per Step in Decibels | 6.0 |
| Attenuation Variation Method | STEPPED |
| Mounting Thread Quantity | 32 PER INCH |
| Mounting Facility Nominal Screw Thread Diameter | 0.138 INCHES IN |
| Operating Temp Range | -40.0 TO 75.0 CELSIUS DEGC |
| Center to Center Distance Between Mounting Facilities Parallel to Width | 3.593 INCHES NOMINAL IN |
| Application Design | TRANSMISSION LINE |
| Terminal Type and Quantity | 2 CONNECTOR, COAXIAL, FEMALE |
| Power Rating | 10.0 WATTS AVERAGE |
| Step Position Quantity | 11 |
| Coaxial Connector Series Designation | BNC |
| 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 |
|---|---|
| C89-570 | Kontron Europe Gmbh (DEU) |
| Reference | Meaning |
|---|---|
| 2808 | 5/9 Secondary reference U.S. Government activity |
| C89-570 | 3/9 Design control — primary reference U.S. Government activity |
NSN 5985-00-258-5171 is a Attenuator,variable, manufactured by Kontron Europe Gmbh, classified under FSC 5985, Antennas, Waveguides, and Related Equipment. Status: active.
NSN 5985-00-258-5171 has 1 manufacturer part number on file: C89-570 (Kontron Europe Gmbh).
8 possible matches (shared part number, not a government interchangeability claim): 5920-00-280-7829, 5905-00-442-1955, 5330-00-535-7539. Verify interchangeability with system specifications before substitution.
Key specifications for C89-570: Insertion Loss at Minimum Attenuation in Maximum Decibels: 6.0; Impedance Rating in Ohms: 50.0 INPUT-OUTPUT; Mounting Facility Type and Quantity: 4 THREADED HOLE(S); Overall Height: 3.500 INCHES NOMINAL IN. 23 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.