The Waveguide Assembly, cataloged under National Stock Number 5985-01-110-1791, 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5985-01-110-1791 |
| Primary Part Number | M-170-FT-74-1A-2A-N |
| Item Name | Waveguide Assembly |
| FSC / FSG | 5985 / 59 — Antennas, Waveguides, and Related Equipment |
| Manufacturer | Microwave Engineering Corporation |
| Status | ACTIVE |
| Tubing Wall Construction Style | SEAMLESS SINGLE TUBING SEGMENT |
| Flange Inside Height | 0.375 INCHES NOMINAL FIRST FLANGE IN |
| Flange Inside Height | 0.475 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 | 1.141 INCHES NOMINAL SINGLE FLANGE IN |
| Waveguide Inside Width | 0.750 INCHES NOMINAL IN |
| Cross-Sectional Shape Style | INTERNAL, RECTANGULAR EXTERNAL, RECTANGULAR |
| Flange Outside Height | 1.500 INCHES NOMINAL SECOND FLANGE IN |
| Flange Outside Height | 1.500 INCHES NOMINAL FIRST FLANGE IN |
| Flange Connecting Hole Diameter | 0.144 INCHES NOMINAL SINGLE FLANGE ALL CONNECTION FACILITIES IN |
| Flange Inside Width | 0.750 INCHES NOMINAL FIRST FLANGE IN |
| Flange Inside Width | 0.850 INCHES NOMINAL SECOND FLANGE IN |
| Thread Direction | RIGHT-HAND SINGLE FLANGE ALL CONNECTION FACILITIES |
| Waveguide Length | 6.167 FEET NOMINAL FT |
| Nominal Thread Size | 0.138 INCHES SINGLE FLANGE ALL CONNECTION FACILITIES IN |
| Waveguide Outside Height | 0.475 INCHES NOMINAL IN |
| Waveguide Outside Width | 0.850 INCHES NOMINAL IN |
| Flange Depth | 0.500 INCHES NOMINAL FIRST FLANGE IN |
| Flange Depth | 0.391 INCHES NOMINAL SECOND FLANGE IN |
| Flange Outside Width | 1.500 INCHES NOMINAL SECOND FLANGE IN |
| Flange Outside Width | 1.500 INCHES NOMINAL FIRST FLANGE IN |
| Tubing Twist Type | STRAIGHT TWIST SINGLE TUBING SEGMENT |
| Tubing Twist Angle in Deg | 240.0 SINGLE TUBING SEGMENT |
| Surface Treatment | SILVER SINGLE TUBING SEGMENT ALL SURFACES |
| Surface Treatment | ANODIZE ALL FLANGE ALL SURFACES |
| Precious Material and Location | WAVEGUIDE INTERNAL SURFACES SILVER |
| 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 |
|---|---|
| M-170-FT-74-1A-2A-N PRIMARY | Microwave Engineering Corporation (USA) |
| MTPS75-501-N-74A | Microtech Inc Dba Microtech Inc (USA) |
| Reference | Meaning |
|---|---|
| TFT-60-4-A-74-N | 5/9 Secondary reference Microwave Engineering Corporation |
NSN 5985-01-110-1791 is a Waveguide Assembly, manufactured by Microwave Engineering Corporation, classified under FSC 5985, Antennas, Waveguides, and Related Equipment. Status: active.
NSN 5985-01-110-1791 has 2 manufacturer part numbers on file: M-170-FT-74-1A-2A-N (Microwave Engineering Corporation), MTPS75-501-N-74A (Microtech Inc Dba Microtech Inc).
Key specifications for M-170-FT-74-1A-2A-N: Tubing Wall Construction Style: SEAMLESS SINGLE TUBING SEGMENT; Flange Inside Height: 0.375 INCHES NOMINAL FIRST FLANGE IN; Flange Inside Height: 0.475 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 5985-01-110-1791 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.