The Waveguide Assembly, cataloged under National Stock Number 5985-01-439-3855, 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 Frontgrade Technologies Inc.. 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5985-01-439-3855 |
| Primary Part Number | 106780-1 |
| Item Name | Waveguide Assembly |
| FSC / FSG | 5985 / 59 — Antennas, Waveguides, and Related Equipment |
| Manufacturer | Frontgrade Technologies Inc. |
| Status | ACTIVE |
| Flange Quantity | 2 |
| Style Designator | THREE BEND TYPE |
| Flexibility | RIGID ALL TUBING SEGMENT |
| Cross-Sectional Shape Style | INTERNAL, RECTANGULAR EXTERNAL, RECTANGULAR |
| Waveguide Length | 26.680 INCHES NOMINAL IN |
| Material | ALUMINUM ALLOY ALL TUBING SEGMENT AND FLANGE |
| 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 |
|---|---|
| 106780-2 | Frontgrade Technologies Inc. (USA) |
| 106780-1 PRIMARY | Frontgrade Technologies Inc. (USA) |
| Reference | Meaning |
|---|---|
| 685621-1 | 5/9 Secondary reference Drs Sustainment Systems, Inc. |
| 685621-301 | 5/9 Secondary reference Drs Sustainment Systems, Inc. |
NSN 5985-01-439-3855 is a Waveguide Assembly, manufactured by Frontgrade Technologies Inc., classified under FSC 5985, Antennas, Waveguides, and Related Equipment. Status: active.
NSN 5985-01-439-3855 has 2 manufacturer part numbers on file: 106780-2 (Frontgrade Technologies Inc.), 106780-1 (Frontgrade Technologies Inc.).
1 possible match (shared part number, not a government interchangeability claim): 2540-01-533-0490. Verify interchangeability with system specifications before substitution.
Key specifications for 106780-1: Flange Quantity: 2; Style Designator: THREE BEND TYPE; Flexibility: RIGID ALL TUBING SEGMENT; Cross-Sectional Shape Style: INTERNAL, RECTANGULAR EXTERNAL, RECTANGULAR. 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 5985-01-439-3855 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.