The Attenuator,variable, cataloged under National Stock Number 5985-01-260-4167, 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 Caes Systems Llc. Government technical data includes 21 specifications, cited from the U.S. Government catalog. The record lists 3 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5985-01-260-4167 |
| Primary Part Number | DA-A13 |
| Item Name | Attenuator,variable |
| FSC / FSG | 5985 / 59 — Antennas, Waveguides, and Related Equipment |
| Manufacturer | Caes Systems Llc |
| Status | ACTIVE |
| Impedance Rating in Ohms | 50.0 INPUT-OUTPUT |
| Mounting Facility Type and Quantity | 8 THREADED HOLE(S) |
| Frequency Range | 3.100 GIGAHERTZ MINIMUM AND 3.500 GIGAHERTZ MAXIMUM |
| Body Style | IRREGULAR |
| Attenuation Accuracy Reference Frequency | 3.3 GIGAHERTZ |
| Mounting Facility Pattern | EIGHT POSITION RECTANGULAR |
| Adjustment Device Type and Quantity | 1 ELECTRONIC, CURRENT CONTROLLED AND 1 ELECTRONIC, VOLTAGE CONTROLLED |
| Center to Center Distance Between Mounting Facilities Parallel to Length | 5.350 INCHES NOMINAL IN |
| Overall Attenuation Range in Decibels | +2.0 TO 62.0 |
| Voltage Standing Wave Ratio | 1.30 |
| Mounting Facility Screw Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| Overall Attenuation Accuracy in Decibels | -0.25 TO 0.25 |
| Attenuation Per Step in Decibels | 2.0 AND 4.0 AND 8.0 AND 16.0 AND 32.0 |
| Attenuation Variation Method | STEPPED |
| Mounting Thread Quantity | 56 PER INCH |
| Mounting Facility Nominal Screw Thread Diameter | 0.086 INCHES IN |
| Center to Center Distance Between Mounting Facilities Parallel to Width | 2.000 INCHES NOMINAL IN |
| Application Design | TRANSMISSION LINE |
| Terminal Type and Quantity | 2 CONNECTOR, COAXIAL, FEMALE AND 1 CONNECTOR, RECEPTACLE |
| Step Position Quantity | 5 |
| Coaxial Connector Series Designation | SMA |
| 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 |
|---|---|
| 5056-K77 | Robinson Laboratories Inc Dba Herley New England (USA) |
| DA-A13 PRIMARY | Caes Systems Llc (USA) |
| DA-A13S | Caes Systems Llc (USA) |
| Reference | Meaning |
|---|---|
| 2900851-3 | 7/2 Vendor item drawing reference Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier |
NSN 5985-01-260-4167 is a Attenuator,variable, manufactured by Caes Systems Llc, classified under FSC 5985, Antennas, Waveguides, and Related Equipment. Status: active.
NSN 5985-01-260-4167 has 3 manufacturer part numbers on file: 5056-K77 (Robinson Laboratories Inc Dba Herley New England), DA-A13 (Caes Systems Llc), DA-A13S (Caes Systems Llc).
Key specifications for DA-A13: Impedance Rating in Ohms: 50.0 INPUT-OUTPUT; Mounting Facility Type and Quantity: 8 THREADED HOLE(S); Overall Height: 1.380 INCHES NOMINAL IN; Frequency Range: 3.100 GIGAHERTZ MINIMUM AND 3.500 GIGAHERTZ MAXIMUM. 21 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.