The Attenuator,variable, cataloged under National Stock Number 5985-01-398-8303, 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 Lockheed Martin Corporation Div Rms. Government technical data includes 21 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5985-01-398-8303 |
| Primary Part Number | 1211513-201 |
| Item Name | Attenuator,variable |
| FSC / FSG | 5985 / 59 — Antennas, Waveguides, and Related Equipment |
| Manufacturer | Lockheed Martin Corporation Div Rms |
| Status | ACTIVE |
| Shaft Type | ROUND, SLOTTED |
| Insertion Loss at Minimum Attenuation in Maximum Decibels | 0.5 |
| Impedance Rating in Ohms | 50.0 INPUT-OUTPUT |
| Mounting Facility Type and Quantity | 4 UNTHREADED HOLE(S) |
| Frequency Range | 2.700 GIGAHERTZ MINIMUM AND 2.900 GIGAHERTZ MAXIMUM |
| Body Style | COAXIAL TYPE |
| Mounting Facility Pattern | FOUR POSITION RECTANGULAR |
| Adjustment Device Type and Quantity | 1 SHAFT |
| Center to Center Distance Between Mounting Facilities Parallel to Length | 2.750 INCHES NOMINAL IN |
| Overall Attenuation Range in Decibels | +0.0 TO 20.0 |
| Voltage Standing Wave Ratio | 1.50 |
| Unthreaded Mounting Hole Diameter | 0.125 INCHES NOMINAL IN |
| Overall Attenuation Accuracy in Decibels | -2.00 TO 2.00 |
| Attenuation Variation Method | CONTINUOUS |
| Center to Center Distance Between Mounting Facilities Parallel to Height | 2.250 INCHES NOMINAL IN |
| Body Material | ALUMINUM |
| Operating Temp Range | -67.0 TO 125.0 CELSIUS DEGC |
| Application Design | TRANSMISSION LINE |
| Terminal Type and Quantity | 2 CONNECTOR, COAXIAL, FEMALE |
| Power Rating | 50.0 WATTS AVERAGE AND 8.0 KILOWATTS PEAK |
| Coaxial Connector Series Designation | SMA |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL B — Remove Demilitarization Key Points |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 1211513-201 PRIMARY | Lockheed Martin Corporation Div Rms (USA) |
| AR4221-1 | Antenna & Radome Research Associates Corp Dba Arra Inc Div Arra Inc (USA) |
| Reference | Meaning |
|---|---|
| 1211513-201 | 5/9 Secondary reference Lockheed Martin Corporation Div Rms - Mitchel Field |
NSN 5985-01-398-8303 is a Attenuator,variable, manufactured by Lockheed Martin Corporation Div Rms, classified under FSC 5985, Antennas, Waveguides, and Related Equipment. Status: active.
NSN 5985-01-398-8303 has 2 manufacturer part numbers on file: 1211513-201 (Lockheed Martin Corporation Div Rms), AR4221-1 (Antenna & Radome Research Associates Corp Dba Arra Inc Div Arra Inc).
Key specifications for 1211513-201: Shaft Type: ROUND, SLOTTED; Insertion Loss at Minimum Attenuation in Maximum Decibels: 0.5; Impedance Rating in Ohms: 50.0 INPUT-OUTPUT; Mounting Facility Type and Quantity: 4 UNTHREADED HOLE(S). 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.
NSN 5985-01-398-8303 has DEMIL Code B. 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.