The Waveguide Assembly, cataloged under National Stock Number 5985-01-293-9998, 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 4 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5985-01-293-9998 |
| Primary Part Number | TFT-112-4-A-6-N |
| Item Name | Waveguide Assembly |
| FSC / FSG | 5985 / 59 — Antennas, Waveguides, and Related Equipment |
| Manufacturer | Microwave Engineering Corporation |
| Status | ACTIVE |
| FSC Application Data | ANTENNAS,WAVEGUIDES,AND RELATED EQUIPMENT |
| Tubing Wall Construction Style | SEAMLESS SINGLE TUBING SEGMENT |
| Flange Inside Height | 0.493 INCHES MINIMUM AND 0.501 INCHES MAXIMUM FIRST FLANGE IN |
| Flange Inside Height | 0.630 INCHES MINIMUM 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 | 1.610 INCHES MINIMUM AND 1.640 INCHES MAXIMUM FIRST FLANGE IN |
| Waveguide Inside Width | 1.118 INCHES MINIMUM AND 1.126 INCHES MAXIMUM IN |
| Cross-Sectional Shape Style | INTERNAL, RECTANGULAR EXTERNAL, RECTANGULAR |
| Operating Pressure | 50.0 POUNDS PER SQUARE INCH GAUGE (PSIG) MAXIMUM LBS |
| Flange Outside Height | 1.860 INCHES MINIMUM AND 1.890 INCHES MAXIMUM SECOND FLANGE IN |
| Flange Outside Height | 1.860 INCHES MINIMUM AND 1.890 INCHES MAXIMUM FIRST FLANGE IN |
| Flange Connecting Hole Diameter | 0.169 INCHES MINIMUM SECOND FLANGE ALL CONNECTION FACILITIES IN |
| Flange Inside Width | 1.118 INCHES MINIMUM AND 1.126 INCHES MAXIMUM FIRST FLANGE IN |
| Flange Inside Width | 1.255 INCHES MINIMUM SECOND FLANGE IN |
| Thread Direction | RIGHT-HAND FIRST FLANGE ALL CONNECTION FACILITIES |
| Waveguide Length | 6.000 INCHES NOMINAL IN |
| Nominal Thread Size | 0.164 INCHES FIRST FLANGE ALL CONNECTION FACILITIES IN |
| Waveguide Outside Height | 0.621 INCHES MINIMUM AND 0.629 INCHES MAXIMUM IN |
| Waveguide Outside Width | 1.246 INCHES MINIMUM AND 1.254 INCHES MAXIMUM IN |
| Flange Depth | 0.423 INCHES MINIMUM AND 0.453 INCHES MAXIMUM SECOND FLANGE IN |
| Flange Depth | 0.610 INCHES MINIMUM AND 0.640 INCHES MAXIMUM FIRST FLANGE IN |
| Flange Outside Width | 1.860 INCHES MINIMUM AND 1.890 INCHES MAXIMUM SECOND FLANGE IN |
| Flange Outside Width | 1.860 INCHES MINIMUM AND 1.890 INCHES MAXIMUM FIRST FLANGE IN |
| Tubing Twist Type | TWISTABLE SINGLE TUBING SEGMENT |
| Insertion Loss in Decibels | 0.08 |
| Surface Treatment | SILVER SINGLE TUBING SEGMENT ALL SURFACES |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL Q — CCL Item — Commerce Control List |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| TFT-112-4-A-6-N | Microwave Engineering Corporation (USA) |
| 654VE7190-2 | Microtech Inc Dba Microtech Inc (USA) |
| H170FT-6A-1-2N | Microwave Engineering Corporation (USA) |
| 126690-1 | Frontgrade Technologies Inc. (USA) |
| Reference | Meaning |
|---|---|
| 654VE7190-2 | 3/2 Design control — primary reference U.S. Government activity |
| 126690-1 | 5/9 Secondary reference U.S. Government activity |
| 6-125-6-67A | 5/9 Secondary reference Advanced Technical Materials, Inc. Dba a T M |
NSN 5985-01-293-9998 is a Waveguide Assembly, manufactured by Microwave Engineering Corporation, classified under FSC 5985, Antennas, Waveguides, and Related Equipment. Status: active.
NSN 5985-01-293-9998 has 4 manufacturer part numbers on file: TFT-112-4-A-6-N (Microwave Engineering Corporation), 654VE7190-2 (Microtech Inc Dba Microtech Inc), H170FT-6A-1-2N (Microwave Engineering Corporation), 126690-1 (Frontgrade Technologies Inc.).
Key specifications for TFT-112-4-A-6-N: FSC Application Data: ANTENNAS,WAVEGUIDES,AND RELATED EQUIPMENT; Tubing Wall Construction Style: SEAMLESS SINGLE TUBING SEGMENT; Flange Inside Height: 0.493 INCHES MINIMUM AND 0.501 INCHES MAXIMUM FIRST FLANGE IN; Flange Inside Height: 0.630 INCHES MINIMUM SECOND FLANGE 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 5985-01-293-9998 has DEMIL Code Q. 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.