The Waveguide Assembly, cataloged under National Stock Number 5985-01-030-9979, 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 30 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 | 5985-01-030-9979 |
| Primary Part Number | 112TH109 |
| Item Name | Waveguide Assembly |
| FSC / FSG | 5985 / 59 — Antennas, Waveguides, and Related Equipment |
| Manufacturer | Microwave Development Laboratories, Inc. Dba Microwave Development Laboratories Inc |
| Status | ACTIVE |
| Tubing Wall Construction Style | SEAMLESS SINGLE TUBING SEGMENTSEAMLESS SINGLE TUBING SEGMENT |
| Flange Inside Height | 0.497 INCHES NOMINAL SECOND FLANGE0.497 INCHES NOMINAL SECOND FLANGE IN |
| Flange Inside Height | 0.628 INCHES NOMINAL FIRST FLANGE0.628 INCHES NOMINAL FIRST FLANGE IN |
| Waveguide Width | 3.905 INCHES NOMINAL3.905 INCHES NOMINAL IN |
| Waveguide Height | 2.378 INCHES NOMINAL IN |
| Flange Quantity | 44 |
| Voltage Standing Wave Ratio | 1.251.25 |
| Bend Angle in Deg | 90.0 SINGLE BEND H-PLANE90.0 SINGLE BEND H-PLANE |
| Style Designator | TEE, SHUNT TYPE |
| Flexibility | RIGID ALL TUBING SEGMENT |
| Waveguide Inside Width | 1.122 INCHES NOMINAL1.122 INCHES NOMINAL IN |
| Cross-Sectional Shape Style | INTERNAL, RECTANGULAR EXTERNAL, RECTANGULARINTERNAL, RECTANGULAR EXTERNAL, RECTANGULAR |
| Flange Outside Height | 1.875 INCHES NOMINAL FIRST FLANGE1.875 INCHES NOMINAL FIRST FLANGE IN |
| Flange Outside Height | 1.875 INCHES NOMINAL SECOND FLANGE1.875 INCHES NOMINAL SECOND FLANGE IN |
| Flange Connecting Hole Diameter | 0.169 INCHES NOMINAL FIRST FLANGE SINGLE CONNECTION FACILITY0.169 INCHES NOMINAL FIRST FLANGE SINGLE CONNECTION FACILITY IN |
| Flange Inside Width | 1.122 INCHES NOMINAL SECOND FLANGE1.122 INCHES NOMINAL SECOND FLANGE IN |
| Flange Inside Width | 1.253 INCHES NOMINAL FIRST FLANGE1.253 INCHES NOMINAL FIRST FLANGE IN |
| Thread Direction | RIGHT-HAND SECOND FLANGE SINGLE CONNECTION FACILITYRIGHT-HAND SECOND FLANGE SINGLE CONNECTION FACILITY |
| Waveguide Length | 4.590 INCHES NOMINAL IN |
| Nominal Thread Size | 0.164 INCHES SECOND FLANGE SINGLE CONNECTION FACILITY0.164 INCHES SECOND FLANGE SINGLE CONNECTION FACILITY IN |
| Waveguide Outside Height | 0.625 INCHES NOMINAL0.625 INCHES NOMINAL IN |
| Waveguide Outside Width | 1.250 INCHES NOMINAL1.250 INCHES NOMINAL IN |
| Flange Depth | 0.438 INCHES NOMINAL FIRST FLANGE0.438 INCHES NOMINAL FIRST FLANGE IN |
| Flange Depth | 0.625 INCHES NOMINAL SECOND FLANGE0.625 INCHES NOMINAL SECOND FLANGE IN |
| Flange Outside Width | 1.875 INCHES NOMINAL FIRST FLANGE1.875 INCHES NOMINAL FIRST FLANGE IN |
| Flange Outside Width | 1.875 INCHES NOMINAL SECOND FLANGE1.875 INCHES NOMINAL SECOND FLANGE IN |
| Surface Treatment | GOLD ALL FLANGE ALL SURFACES |
| Waveguide Inside Height | 0.497 INCHES NOMINAL0.497 INCHES NOMINAL IN |
| Thread Class | 2B SECOND FLANGE SINGLE CONNECTION FACILITY2B SECOND FLANGE SINGLE CONNECTION FACILITY |
| Material | COPPER ALLOY ALL 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 |
|---|---|
| 112TH109 PRIMARY | Microwave Development Laboratories, Inc. Dba Microwave Development Laboratories Inc (USA) |
NSN 5985-01-030-9979 is a Waveguide Assembly, manufactured by Microwave Development Laboratories, Inc. Dba Microwave Development Laboratories Inc, classified under FSC 5985, Antennas, Waveguides, and Related Equipment. Status: active.
NSN 5985-01-030-9979 has 1 manufacturer part number on file: 112TH109 (Microwave Development Laboratories, Inc. Dba Microwave Development Laboratories Inc).
Key specifications for 112TH109: Tubing Wall Construction Style: SEAMLESS SINGLE TUBING SEGMENTSEAMLESS SINGLE TUBING SEGMENT; Flange Inside Height: 0.497 INCHES NOMINAL SECOND FLANGE0.497 INCHES NOMINAL SECOND FLANGE IN; Flange Inside Height: 0.628 INCHES NOMINAL FIRST FLANGE0.628 INCHES NOMINAL FIRST FLANGE IN; Waveguide Width: 3.905 INCHES NOMINAL3.905 INCHES NOMINAL IN. 30 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 5985-01-030-9979 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.