The Support,antenna, cataloged under National Stock Number 5985-01-172-9926, 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 Sippican, Inc. Div Communication Division. Government technical data includes 8 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5985-01-172-9926 |
| Primary Part Number | 135820-1 |
| Item Name | Support,antenna |
| FSC / FSG | 5985 / 59 — Antennas, Waveguides, and Related Equipment |
| Manufacturer | Lockheed Martin Sippican, Inc. Div Communication Division |
| Status | ACTIVE |
| Mounting Facility Quantity | 12 |
| Mounting Method | UNTHREADED HOLE(S) |
| Mounting Hole Diameter | 0.953 INCHES MINIMUM AND 0.962 INCHES MAXIMUM IN |
| Basic Shape Style | SQUARE |
| Distance Between Mounting Facility Centers | 20.250 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN |
| Surface Treatment | PAINT |
| Material | STEEL |
| Mounting Hole Type | PLAIN |
| 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 |
|---|---|
| 135820-1 PRIMARY | Lockheed Martin Sippican, Inc. Div Communication Division (USA) |
| Reference | Meaning |
|---|---|
| E135820-1 | C/1 Advisory reference — outside the item-of-supply concept Lockheed Martin Sippican, Inc. Div Communication Division |
NSN 5985-01-172-9926 is a Support,antenna, manufactured by Lockheed Martin Sippican, Inc. Div Communication Division, classified under FSC 5985, Antennas, Waveguides, and Related Equipment. Status: active.
NSN 5985-01-172-9926 has 1 manufacturer part number on file: 135820-1 (Lockheed Martin Sippican, Inc. Div Communication Division).
Key specifications for 135820-1: Mounting Facility Quantity: 12; Mounting Method: UNTHREADED HOLE(S); Mounting Hole Diameter: 0.953 INCHES MINIMUM AND 0.962 INCHES MAXIMUM IN; Overall Length: 24.000 INCHES NOMINAL IN. 8 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.