The Waveguide Assembly, cataloged under National Stock Number 5985-01-110-1789, 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 Engineering Corporation. Government technical data includes 30 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5985-01-110-1789 |
| Primary Part Number | TFT57-4A12N |
| Item Name | Waveguide Assembly |
| FSC / FSG | 5985 / 59 — Antennas, Waveguides, and Related Equipment |
| Manufacturer | Microwave Engineering Corporation |
| Status | ACTIVE |
| Tubing Wall Construction Style | INTERLOCKED SINGLE TUBING SEGMENT |
| Flange Inside Height | 0.311 INCHES NOMINAL FIRST FLANGE IN |
| Flange Inside Height | 0.395 INCHES NOMINAL SECOND FLANGE IN |
| Flange Quantity | 2 |
| Precious Material | SILVER |
| Voltage Standing Wave Ratio | 1.15 |
| Style Designator | STRAIGHT TYPE |
| Flexibility | FLEXIBLE SINGLE TUBING SEGMENT |
| Flange Inside Diameter | 1.000 INCHES NOMINAL FIRST FLANGE IN |
| Waveguide Inside Width | 0.622 INCHES NOMINAL IN |
| Cross-Sectional Shape Style | INTERNAL, RECTANGULAR EXTERNAL, RECTANGULAR |
| Flange Outside Height | 1.313 INCHES NOMINAL SECOND FLANGE IN |
| Flange Outside Height | 1.312 INCHES NOMINAL FIRST FLANGE IN |
| Flange Connecting Hole Diameter | 0.144 INCHES NOMINAL SECOND FLANGE ALL CONNECTION FACILITIES IN |
| Flange Inside Width | 0.622 INCHES NOMINAL FIRST FLANGE IN |
| Flange Inside Width | 0.705 INCHES NOMINAL SECOND FLANGE IN |
| Thread Direction | RIGHT-HAND FIRST FLANGE ALL CONNECTION FACILITIES |
| Waveguide Length | 1.000 FEET NOMINAL FT |
| Nominal Thread Size | 0.138 INCHES FIRST FLANGE ALL CONNECTION FACILITIES IN |
| Waveguide Outside Height | 0.391 INCHES NOMINAL IN |
| Waveguide Outside Width | 0.702 INCHES NOMINAL IN |
| Flange Depth | 0.313 INCHES NOMINAL SECOND FLANGE IN |
| Flange Depth | 0.375 INCHES NOMINAL FIRST FLANGE IN |
| Flange Outside Width | 1.313 INCHES NOMINAL SECOND FLANGE IN |
| Flange Outside Width | 1.312 INCHES NOMINAL FIRST FLANGE IN |
| Tubing Twist Type | TWISTABLE SINGLE TUBING SEGMENT |
| Tubing Twist Angle in Deg | 300.0 SINGLE TUBING SEGMENT |
| Insertion Loss in Decibels | 0.30 |
| Surface Treatment | SILVER SINGLE TUBING SEGMENT ALL SURFACES |
| Surface Treatment | ANODIZE ALL FLANGE OUTSIDE SURFACES |
| 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 |
|---|---|
| MDC62-A3T12 | Dal-Tech Devices, Inc. Dba Dal-Tech Devices Inc Div Dal-Tec Devices, Inc (USA) |
| TFT57-4A12N PRIMARY | Microwave Engineering Corporation (USA) |
NSN 5985-01-110-1789 is a Waveguide Assembly, manufactured by Microwave Engineering Corporation, classified under FSC 5985, Antennas, Waveguides, and Related Equipment. Status: active.
NSN 5985-01-110-1789 has 2 manufacturer part numbers on file: MDC62-A3T12 (Dal-Tech Devices, Inc. Dba Dal-Tech Devices Inc Div Dal-Tec Devices, Inc), TFT57-4A12N (Microwave Engineering Corporation).
Key specifications for TFT57-4A12N: Tubing Wall Construction Style: INTERLOCKED SINGLE TUBING SEGMENT; Flange Inside Height: 0.311 INCHES NOMINAL FIRST FLANGE IN; Flange Inside Height: 0.395 INCHES NOMINAL SECOND FLANGE IN; Flange Quantity: 2. 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 5985-01-110-1789 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.