The Seal,waveguide, cataloged under National Stock Number 5985-01-396-9759, 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 Microwave Development Laboratories, Inc. Dba Microwave Development Laboratories Inc. Government technical data includes 6 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5985-01-396-9759 |
| Primary Part Number | 90WT56 |
| Item Name | Seal,waveguide |
| FSC / FSG | 5985 / 59 — Antennas, Waveguides, and Related Equipment |
| Manufacturer | Microwave Development Laboratories, Inc. Dba Microwave Development Laboratories Inc |
| Status | ACTIVE |
| Style Designator | FOR RECTANGULAR WAVEGUIDE AND FLANGE |
| Seal Outside Height | 1.610 INCHES MINIMUM AND 1.640 INCHES MAXIMUM IN |
| Seal Outside Width | 1.610 INCHES MINIMUM AND 1.640 INCHES MAXIMUM IN |
| Seal Inside Height | 0.396 INCHES MINIMUM AND 0.404 INCHES MAXIMUM IN |
| Material | GLASS SINGLE SEAL |
| Seal Inside Width | 0.896 INCHES MINIMUM AND 0.904 INCHES MAXIMUM IN |
| 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 |
|---|---|
| 90WT56 PRIMARY | Microwave Development Laboratories, Inc. Dba Microwave Development Laboratories Inc (USA) |
NSN 5985-01-396-9759 is a Seal,waveguide, manufactured by Microwave Development Laboratories, Inc. Dba Microwave Development Laboratories Inc, classified under FSC 5985, Antennas, Waveguides, and Related Equipment. Status: active.
NSN 5985-01-396-9759 has 1 manufacturer part number on file: 90WT56 (Microwave Development Laboratories, Inc. Dba Microwave Development Laboratories Inc).
Key specifications for 90WT56: Style Designator: FOR RECTANGULAR WAVEGUIDE AND FLANGE; Seal Outside Height: 1.610 INCHES MINIMUM AND 1.640 INCHES MAXIMUM IN; Seal Outside Width: 1.610 INCHES MINIMUM AND 1.640 INCHES MAXIMUM IN; Seal Inside Height: 0.396 INCHES MINIMUM AND 0.404 INCHES MAXIMUM IN. 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 5985-01-396-9759 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.