The Waveguide Assembly, cataloged under National Stock Number 5985-01-111-0471, 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 Dal-Tech Devices, Inc. Dba Dal-Tech Devices Inc Div Dal-Tec Devices, Inc. Government technical data includes 28 specifications, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5985-01-111-0471 |
| Primary Part Number | MDC187-A2T18 |
| Item Name | Waveguide Assembly |
| FSC / FSG | 5985 / 59 — Antennas, Waveguides, and Related Equipment |
| Manufacturer | Dal-Tech Devices, Inc. Dba Dal-Tech Devices Inc Div Dal-Tec Devices, Inc |
| Status | ACTIVE |
| Tubing Wall Construction Style | INTERLOCKED SINGLE TUBING SEGMENT |
| Flange Inside Height | 1.000 INCHES NOMINAL ALL FLANGES IN |
| Flange Quantity | 2 |
| Precious Material | SILVER |
| Voltage Standing Wave Ratio | 1.10 |
| Style Designator | STRAIGHT TYPE |
| Flexibility | FLEXIBLE SINGLE TUBING SEGMENT |
| Waveguide Inside Width | 1.872 INCHES NOMINAL IN |
| Cross-Sectional Shape Style | INTERNAL, RECTANGULAR EXTERNAL, RECTANGULAR |
| Flange Connecting Hole Diameter | 0.199 INCHES NOMINAL ALL FLANGES ALL CONNECTION FACILITIES IN |
| Flange Inside Width | 2.000 INCHES NOMINAL ALL FLANGES IN |
| Waveguide Length | 1.500 FEET NOMINAL FT |
| Waveguide Outside Height | 1.000 INCHES NOMINAL IN |
| Waveguide Outside Width | 2.000 INCHES NOMINAL IN |
| Flange Depth | 0.375 INCHES NOMINAL ALL FLANGES IN |
| Tubing Twist Type | TWISTABLE SINGLE TUBING SEGMENT |
| Tubing Twist Angle in Deg | 105.0 SINGLE TUBING SEGMENT |
| Insertion Loss in Decibels | 0.06 |
| Surface Treatment | SILVER SINGLE TUBING SEGMENT ALL SURFACES |
| Surface Treatment | ANODIZE ALL FLANGE OUTSIDE SURFACES |
| Precious Material and Location | WAVEGUIDE OVERALL SURFACES SILVER |
| Waveguide Inside Height | 0.872 INCHES NOMINAL IN |
| Material | RUBBER SYNTHETIC SINGLE TUBING JACKET |
| Material | ALUMINUM ALLOY ALL FLANGE |
| Material | COPPER ALLOY SINGLE TUBING SEGMENT |
| Flange Connecting Facility and Quantity | 8 UNTHREADED HOLE(S) ALL FLANGES ALL CONNECTION FACILITIES |
| Flange Outside Diameter | 3.625 INCHES NOMINAL ALL FLANGES IN |
| Flange Style | COVER TYPE ALL FLANGES |
| 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 |
|---|---|
| MDC187-A2T18 PRIMARY | Dal-Tech Devices, Inc. Dba Dal-Tech Devices Inc Div Dal-Tec Devices, Inc (USA) |
| TFT-78-2-A-18-N PRIMARY | Microwave Engineering Corporation (USA) |
| MTPS187-500-N-18A | Microtech Inc Dba Microtech Inc (USA) |
NSN 5985-01-111-0471 is a Waveguide Assembly, manufactured by Dal-Tech Devices, Inc. Dba Dal-Tech Devices Inc Div Dal-Tec Devices, Inc, classified under FSC 5985, Antennas, Waveguides, and Related Equipment. Status: active.
NSN 5985-01-111-0471 has 3 manufacturer part numbers on file: MDC187-A2T18 (Dal-Tech Devices, Inc. Dba Dal-Tech Devices Inc Div Dal-Tec Devices, Inc), TFT-78-2-A-18-N (Microwave Engineering Corporation), MTPS187-500-N-18A (Microtech Inc Dba Microtech Inc).
Key specifications for MDC187-A2T18: Tubing Wall Construction Style: INTERLOCKED SINGLE TUBING SEGMENT; Flange Inside Height: 1.000 INCHES NOMINAL ALL FLANGES IN; Flange Quantity: 2; Precious Material: SILVER. 28 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 5985-01-111-0471 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.