The Coupler,directional, cataloged under National Stock Number 5985-01-077-6331, 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 Rockwell Collins, Inc. Dba Collins Aerospace Government Systems Div Collins Aerospace - Government Systems. Government technical data includes 6 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5985-01-077-6331 |
| Primary Part Number | 277-0447-010 |
| Item Name | Coupler,directional |
| FSC / FSG | 5985 / 59 — Antennas, Waveguides, and Related Equipment |
| Manufacturer | Rockwell Collins, Inc. Dba Collins Aerospace Government Systems Div Collins Aerospace - Government Systems |
| Status | ACTIVE |
| Usage Design | MAIN LINE TERMINAL FITTING |
| Power Loss in Decibels | 30.0 |
| Identifying Number | TERMINAL FITTING TYPEDSMA |
| Design Type | UNIDIRECTIONAL |
| Radio Frequency Rating | 1.0 MEGAHERTZ MINIMUM AND 100.0 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 |
|---|---|
| CRM20-50/24167 | Merrimac Industries, Inc (USA) |
| 277-0447-010 PRIMARY | Rockwell Collins, Inc. Dba Collins Aerospace Government Systems Div Collins Aerospace - Government Systems (USA) |
| Reference | Meaning |
|---|---|
| CRM20-50 | 5/9 Secondary reference Merrimac Industries, Inc |
NSN 5985-01-077-6331 is a Coupler,directional, manufactured by Rockwell Collins, Inc. Dba Collins Aerospace Government Systems Div Collins Aerospace - Government Systems, classified under FSC 5985, Antennas, Waveguides, and Related Equipment. Status: active.
NSN 5985-01-077-6331 has 2 manufacturer part numbers on file: CRM20-50/24167 (Merrimac Industries, Inc), 277-0447-010 (Rockwell Collins, Inc. Dba Collins Aerospace Government Systems Div Collins Aerospace - Government Systems).
Key specifications for 277-0447-010: Overall Height: 0.560 INCHES MAXIMUM IN; Usage Design: MAIN LINE TERMINAL FITTING; Power Loss in Decibels: 30.0; Identifying Number: TERMINAL FITTING TYPEDSMA. 6 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 5985-01-077-6331 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.