The Waveguide Assembly, cataloged under National Stock Number 5985-00-314-5213, 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 27 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 | 5985-00-314-5213 |
| Primary Part Number | 28BH18-3F |
| 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 SEGMENT |
| Flange Inside Height | 0.222 INCHES NOMINAL ALL FLANGES IN |
| Flange Quantity | 2 |
| Bend Angle in Deg | 90.0 SINGLE BEND H-PLANE |
| Style Designator | BEND TYPE |
| Waveguide Offset Distance | 1.270 INCHES NOMINAL IN |
| Flexibility | RIGID SINGLE TUBING SEGMENT |
| Flange Inside Diameter | 0.530 INCHES NOMINAL ALL FLANGES IN |
| Waveguide Inside Width | 0.280 INCHES NOMINAL IN |
| Cross-Sectional Shape Style | INTERNAL, RECTANGULAR EXTERNAL, RECTANGULAR |
| Flange Outside Height | 0.750 INCHES NOMINAL ALL FLANGES IN |
| Flange Inside Width | 0.362 INCHES NOMINAL ALL FLANGES IN |
| Thread Direction | RIGHT-HAND ALL FLANGES ALL CONNECTION FACILITIES |
| Nominal Thread Size | 0.112 INCHES ALL FLANGES ALL CONNECTION FACILITIES IN |
| Waveguide Outside Height | 0.220 INCHES NOMINAL IN |
| Waveguide Outside Width | 0.360 INCHES NOMINAL IN |
| Flange Depth | 0.210 INCHES NOMINAL ALL FLANGES IN |
| Flange Outside Width | 0.750 INCHES NOMINAL ALL FLANGES IN |
| Surface Treatment | SILVER SINGLE TUBING SEGMENT INSIDE SURFACES |
| Surface Treatment | ENAMEL SINGLE TUBING SEGMENT OUTSIDE SURFACES |
| Waveguide Inside Height | 0.140 INCHES NOMINAL IN |
| Thread Class | 2A ALL FLANGES ALL CONNECTION FACILITIES A |
| Material | COPPER SINGLE TUBING SEGMENT |
| Flange Connecting Facility and Quantity | 4 THREADED HOLE(S) ALL FLANGES ALL CONNECTION FACILITIES |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) ALL FLANGES ALL CONNECTION FACILITIES |
| Flange Style | CHOKE TYPE ALL FLANGES |
| Waveguide Longer Offset Distance | 1.270 INCHES NOMINAL 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 |
|---|---|
| 28BH18-3F PRIMARY | Microwave Development Laboratories, Inc. Dba Microwave Development Laboratories Inc (USA) |
NSN 5985-00-314-5213 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 5985-00-314-5213 has 1 manufacturer part number on file: 28BH18-3F (Microwave Development Laboratories, Inc. Dba Microwave Development Laboratories Inc).
Key specifications for 28BH18-3F: Tubing Wall Construction Style: SEAMLESS SINGLE TUBING SEGMENT; Flange Inside Height: 0.222 INCHES NOMINAL ALL FLANGES IN; Flange Quantity: 2; Bend Angle in Deg: 90.0 SINGLE BEND H-PLANE. 27 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 5985-00-314-5213 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.