The Attenuator,variable, cataloged under National Stock Number 5985-01-155-1375, 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 18 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5985-01-155-1375 |
| Primary Part Number | 77C719258P1 |
| 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 | 1.5 |
| Impedance Rating in Ohms | 50.0 INPUT-OUTPUT |
| Mounting Facility Type and Quantity | 1 BRACKET(S) AND 2 UNTHREADED HOLE(S) |
| Frequency Range | 0.000 HERTZ MINIMUM AND 200.000 MEGAHERTZ MAXIMUM |
| Body Style | COAXIAL TYPE |
| Mounting Facility Pattern | TWO POSITION IN-LINE |
| Adjustment Device Type and Quantity | 1 SHAFT |
| Overall Attenuation Range in Decibels | +0.0 TO 15.0 |
| Voltage Standing Wave Ratio | 1.50 |
| Unthreaded Mounting Hole Diameter | 0.144 INCHES NOMINAL IN |
| Attenuation Variation Method | CONTINUOUS |
| Distance Between Mounting Facility Centers | 1.094 INCHES NOMINAL IN |
| Shaft Length | 0.125 INCHES NOMINAL IN |
| Application Design | TRANSMISSION LINE |
| Terminal Type and Quantity | 2 CONNECTOR, COAXIAL, FEMALE |
| Power Rating | 500.0 MILLIWATTS AVERAGE |
| Coaxial Connector Series Designation | SMA |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL D — Destroy Item |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 77C719258P1 PRIMARY | Lockheed Martin Corporation Div Rms (USA) |
| L28731-50001 | Thales Uk Limited Dba Thales Uk Ltd Underwater Systems (GBR) |
| Reference | Meaning |
|---|---|
| ARC-1 | 5/9 Secondary reference Merrimac Industries, Inc |
| ARC-1/27831 | 5/9 Secondary reference Merrimac Industries, Inc |
| 50CAL25-1500 | 5/9 Secondary reference Alan Industries Inc |
NSN 5985-01-155-1375 is a Attenuator,variable, manufactured by Lockheed Martin Corporation Div Rms, classified under FSC 5985, Antennas, Waveguides, and Related Equipment. Status: active.
NSN 5985-01-155-1375 has 2 manufacturer part numbers on file: 77C719258P1 (Lockheed Martin Corporation Div Rms), L28731-50001 (Thales Uk Limited Dba Thales Uk Ltd Underwater Systems).
Key specifications for 77C719258P1: Shaft Type: ROUND, SLOTTED; Insertion Loss at Minimum Attenuation in Maximum Decibels: 1.5; Impedance Rating in Ohms: 50.0 INPUT-OUTPUT; Mounting Facility Type and Quantity: 1 BRACKET(S) AND 2 UNTHREADED HOLE(S). 18 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 5985-01-155-1375 has DEMIL Code D. 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.