The Attenuator,variable, cataloged under National Stock Number 5985-01-129-2867, 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 The Boeing Company Div Defense. Government technical data includes 22 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5985-01-129-2867 |
| Primary Part Number | ST5M1337-002 |
| Item Name | Attenuator,variable |
| FSC / FSG | 5985 / 59 — Antennas, Waveguides, and Related Equipment |
| Manufacturer | The Boeing Company Div Defense |
| Status | ACTIVE |
| Shaft Type | ROUND, FLATTED |
| Insertion Loss at Minimum Attenuation in Maximum Decibels | 1.0 |
| Bushing Length | 0.375 INCHES NOMINAL IN |
| Impedance Rating in Ohms | 600.0 INPUT-OUTPUT |
| Body Diameter | 1.062 INCHES NOMINAL IN |
| Mounting Facility Type and Quantity | 1 BUSHING |
| Frequency Range | 200.000 HERTZ MINIMUM AND 2.000 KILOHERTZ MAXIMUM |
| Shaft Diameter | 0.248 INCHES MINIMUM AND 0.250 INCHES MAXIMUM IN |
| Body Style | CYLINDRICAL W/SIDE TERMINALS |
| Adjustment Device Type and Quantity | 1 SHAFT |
| First Flat Length | 0.437 INCHES MINIMUM IN |
| Overall Attenuation Range in Decibels | +0.0 TO 40.0 |
| Overall Attenuation Accuracy in Decibels | -1.00 TO 1.00 |
| Attenuation Variation Method | CONTINUOUS |
| Schematic Diagram Designator | UNBALANCED "LL" |
| Shaft Length | 0.875 INCHES NOMINAL IN |
| Body Length | 1.250 INCHES MAXIMUM IN |
| Operating Temp Range | -67.0 TO 160.0 FAHRENHEIT DEGF |
| Application Design | AUDIO |
| Terminal Type and Quantity | 6 PIN |
| Power Rating | 1.0 WATTS AVERAGE |
| Flat Height | 0.218 INCHES NOMINAL IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL Q — CCL Item — Commerce Control List |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| ST5M1337-002 PRIMARY | The Boeing Company Div Defense (USA) |
| 1300-1086 | Bei Sensors & Systems Company, Inc. Dba Bei Duncan (USA) |
| 17WB2-3636 | Servo Instrument Corporation (USA) |
| Reference | Meaning |
|---|---|
| 17WB2-002 | 5/9 Secondary reference Servo Instrument Corporation |
| 10134424 | 6/9 Informative reference only Nimikkeistokeskus Ncb Finland |
NSN 5985-01-129-2867 is a Attenuator,variable, manufactured by The Boeing Company Div Defense, classified under FSC 5985, Antennas, Waveguides, and Related Equipment. Status: active.
NSN 5985-01-129-2867 has 3 manufacturer part numbers on file: ST5M1337-002 (The Boeing Company Div Defense), 1300-1086 (Bei Sensors & Systems Company, Inc. Dba Bei Duncan), 17WB2-3636 (Servo Instrument Corporation).
1 possible match (shared part number, not a government interchangeability claim): 4010-01-548-6789. Verify interchangeability with system specifications before substitution.
Key specifications for ST5M1337-002: Shaft Type: ROUND, FLATTED; Insertion Loss at Minimum Attenuation in Maximum Decibels: 1.0; Bushing Length: 0.375 INCHES NOMINAL IN; Impedance Rating in Ohms: 600.0 INPUT-OUTPUT. 22 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 5985-01-129-2867 has DEMIL Code Q. 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.