The Coupler,directional, cataloged under National Stock Number 5985-01-491-3443, 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 Merrimac Industries, Inc. Government technical data includes 4 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5985-01-491-3443 |
| Primary Part Number | CSM-6M-12G |
| Item Name | Coupler,directional |
| FSC / FSG | 5985 / 59 — Antennas, Waveguides, and Related Equipment |
| Manufacturer | Merrimac Industries, Inc |
| Status | ACTIVE |
| Power Loss in Decibels | 6.0 |
| Design Type | UNIDIRECTIONAL |
| Radio Frequency Rating | 7.5 HERTZ MINIMUM AND 16.0 GIGAHERTZ MAXIMUM |
| Unit Type | COAXIAL LINE |
| 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 |
|---|---|
| 2007977-001 | L3harris Technologies, Inc. Dba Harris Div L3harris Technologies Inc Dba Harris Corporation (USA) |
| CSM-6M-12G PRIMARY | Merrimac Industries, Inc (USA) |
| Reference | Meaning |
|---|---|
| 2007977 | D/9 Drawing number reference only L3harris Technologies, Inc. Dba Harris Div L3harris Technologies Inc Dba Harris Corporation |
NSN 5985-01-491-3443 is a Coupler,directional, manufactured by Merrimac Industries, Inc, classified under FSC 5985, Antennas, Waveguides, and Related Equipment. Status: active.
NSN 5985-01-491-3443 has 2 manufacturer part numbers on file: 2007977-001 (L3harris Technologies, Inc. Dba Harris Div L3harris Technologies Inc Dba Harris Corporation), CSM-6M-12G (Merrimac Industries, Inc).
2 possible matches (shared part number, not a government interchangeability claim): 5985-01-491-3444, 5985-01-491-3447. Verify interchangeability with system specifications before substitution.
Key specifications for CSM-6M-12G: Overall Height: 1.150 INCHES NOMINAL IN; Power Loss in Decibels: 6.0; Design Type: UNIDIRECTIONAL; Radio Frequency Rating: 7.5 HERTZ MINIMUM AND 16.0 GIGAHERTZ MAXIMUM. 4 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.