The Coupler,directional, cataloged under National Stock Number 5985-01-111-6409, 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 Bird Electronic Corporation Div Bird Electronic Corp. Government technical data includes 5 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. 4 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 | 5985-01-111-6409 |
| Primary Part Number | 400-225 |
| Item Name | Coupler,directional |
| FSC / FSG | 5985 / 59 — Antennas, Waveguides, and Related Equipment |
| Manufacturer | Bird Electronic Corporation Div Bird Electronic Corp |
| Status | ACTIVE |
| Power Loss in Decibels | 1.5 |
| Design Type | BIDIRECTIONAL |
| Overall Diameter | 1.250 INCHES NOMINAL IN |
| Radio Frequency Rating | 225.0 MEGAHERTZ MINIMUM AND 450.0 MEGAHERTZ MAXIMUM |
| Unit Type | COAXIAL LINE |
| 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 |
|---|---|
| 400-225 PRIMARY | Bird Electronic Corporation Div Bird Electronic Corp (USA) |
| 277-0363-130 | Rockwell Collins, Inc. Dba Collins Aerospace Government Systems Div Collins Aerospace - Government Systems (USA) |
NSN 5985-01-111-6409 is a Coupler,directional, manufactured by Bird Electronic Corporation Div Bird Electronic Corp, classified under FSC 5985, Antennas, Waveguides, and Related Equipment. Status: active.
NSN 5985-01-111-6409 has 2 manufacturer part numbers on file: 400-225 (Bird Electronic Corporation Div Bird Electronic Corp), 277-0363-130 (Rockwell Collins, Inc. Dba Collins Aerospace Government Systems Div Collins Aerospace - Government Systems).
4 possible matches (shared part number, not a government interchangeability claim): 6625-01-115-7972, 6645-01-311-5481, 5330-01-479-0584. Verify interchangeability with system specifications before substitution.
Key specifications for 400-225: Power Loss in Decibels: 1.5; Design Type: BIDIRECTIONAL; Overall Diameter: 1.250 INCHES NOMINAL IN; Radio Frequency Rating: 225.0 MEGAHERTZ MINIMUM AND 450.0 MEGAHERTZ MAXIMUM. 5 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 5985-01-111-6409 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.