The Attenuator,variable, cataloged under National Stock Number 5985-01-309-4948, 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 Honeywell Intl Inc Defense Avionics Systems. Government technical data includes 24 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 | 5985-01-309-4948 |
| Primary Part Number | 6406856-5 |
| Item Name | Attenuator,variable |
| FSC / FSG | 5985 / 59 — Antennas, Waveguides, and Related Equipment |
| Manufacturer | Honeywell Intl Inc Defense Avionics Systems |
| Status | ACTIVE |
| Insertion Loss at Minimum Attenuation in Maximum Decibels | 3.3 |
| Impedance Rating in Ohms | 50.0 INPUT-OUTPUT |
| Mounting Facility Type and Quantity | 4 THREADED HOLE(S) |
| Mounting Thread Tolerance Class | 2B EXTERNAL |
| Frequency Range | 0.000 HERTZ MINIMUM AND 1.500 GIGAHERTZ MAXIMUM |
| Body Style | COAXIAL TYPE |
| Attenuation Accuracy Reference Frequency | 1.0 GIGAHERTZ |
| Mounting Facility Pattern | FOUR POSITION RECTANGULAR |
| Adjustment Device Type and Quantity | 1 ELECTRONIC, PROGRAMMABLE |
| Center to Center Distance Between Mounting Facilities Parallel to Length | 2.375 INCHES NOMINAL IN |
| Overall Attenuation Range in Decibels | +1.0 TO 32.0 |
| Voltage Standing Wave Ratio | 1.40 |
| Segment Attenuation Range in Decibels | +1.00 TO 2.00 AND +2.00 TO 4.00 AND +4.00 TO 8.00 AND +8.00 TO 16.00 AND +16.00 TO 32.00 |
| Mounting Facility Screw Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| Attenuation Per Step in Decibels | 1.0 AND 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 | 0.600 INCHES NOMINAL IN |
| Application Design | TRANSMISSION LINE |
| Terminal Type and Quantity | 2 CONNECTOR, COAXIAL, FEMALE AND 1 CONNECTOR, RECEPTACLE |
| Power Rating | 0.5 WATTS AVERAGE |
| Step Position Quantity | 6 |
| 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 |
|---|---|
| 5P63SS26-TTL | Wavetek Rf Products, Inc (USA) |
| 6406856-5 PRIMARY | Honeywell Intl Inc Defense Avionics Systems (USA) |
NSN 5985-01-309-4948 is a Attenuator,variable, manufactured by Honeywell Intl Inc Defense Avionics Systems, classified under FSC 5985, Antennas, Waveguides, and Related Equipment. Status: active.
NSN 5985-01-309-4948 has 2 manufacturer part numbers on file: 5P63SS26-TTL (Wavetek Rf Products, Inc), 6406856-5 (Honeywell Intl Inc Defense Avionics Systems).
Key specifications for 6406856-5: Insertion Loss at Minimum Attenuation in Maximum Decibels: 3.3; Impedance Rating in Ohms: 50.0 INPUT-OUTPUT; Mounting Facility Type and Quantity: 4 THREADED HOLE(S); Overall Height: 0.800 INCHES NOMINAL IN. 24 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.