The Attenuator,variable, cataloged under National Stock Number 5985-01-321-3221, 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 Antenna & Radome Research Associates Corp Dba Arra Inc Div Arra Inc. Government technical data includes 10 specifications, cited from the U.S. Government catalog. The record lists 4 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5985-01-321-3221 |
| Primary Part Number | 3147159-2 |
| Item Name | Attenuator,variable |
| FSC / FSG | 5985 / 59 — Antennas, Waveguides, and Related Equipment |
| Manufacturer | Antenna & Radome Research Associates Corp Dba Arra Inc Div Arra Inc |
| Status | ACTIVE |
| Insertion Loss at Minimum Attenuation in Maximum Decibels | 0.4 |
| Mounting Facility Type and Quantity | 2 TERMINAL WITH MOUNTING HOLES |
| Frequency Range | 8.900 GIGAHERTZ MINIMUM AND 9.400 GIGAHERTZ MAXIMUM |
| Body Style | WAVEGUIDE TYPE |
| Mounting Facility Pattern | FOUR POSITION RECTANGULAR |
| Adjustment Device Type and Quantity | 1 THUMBSCREW |
| Voltage Standing Wave Ratio | 1.20 |
| Application Design | WAVEGUIDE |
| Terminal Type and Quantity | 2 FLANGE |
| Power Rating | 0.5 WATTS AVERAGE |
| 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 |
|---|---|
| 1053967-2 | Lockheed Martin Corporation Div Rms (USA) |
| 3147159-2 PRIMARY | Antenna & Radome Research Associates Corp Dba Arra Inc Div Arra Inc (USA) |
| 3147159-2 PRIMARY | Omega Laboratories Inc (USA) |
| 17020/19,20,21,22 PRIMARY | Marc Alan Group the, Inc (USA) |
| Reference | Meaning |
|---|---|
| 1053967-2 | 5/9 Secondary reference Lockheed Martin Corporation Div Rms - Mitchel Field |
| 3147159-2 | 5/9 Secondary reference Marc Alan Group the, Inc |
| 3147159-2 | 7/2 Vendor item drawing reference Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier |
| 3147159-2 | 5/9 Secondary reference Atlantic Microwave Corporation Div Cobham Electronic Systems |
NSN 5985-01-321-3221 is a Attenuator,variable, manufactured by Antenna & Radome Research Associates Corp Dba Arra Inc Div Arra Inc, classified under FSC 5985, Antennas, Waveguides, and Related Equipment. Status: active.
NSN 5985-01-321-3221 has 4 manufacturer part numbers on file: 1053967-2 (Lockheed Martin Corporation Div Rms), 3147159-2 (Antenna & Radome Research Associates Corp Dba Arra Inc Div Arra Inc), 3147159-2 (Omega Laboratories Inc), 17020/19,20,21,22 (Marc Alan Group the, Inc).
Key specifications for 3147159-2: Insertion Loss at Minimum Attenuation in Maximum Decibels: 0.4; Mounting Facility Type and Quantity: 2 TERMINAL WITH MOUNTING HOLES; Frequency Range: 8.900 GIGAHERTZ MINIMUM AND 9.400 GIGAHERTZ MAXIMUM; Body Style: WAVEGUIDE TYPE. 10 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.