The Adapter,waveguide, cataloged under National Stock Number 5985-00-177-8635, 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 Microtech Inc Dba Microtech Inc. Government technical data includes 27 specifications, cited from the U.S. Government catalog. The record lists 5 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5985-00-177-8635 |
| Primary Part Number | 900939-1 |
| Item Name | Adapter,waveguide |
| FSC / FSG | 5985 / 59 — Antennas, Waveguides, and Related Equipment |
| Manufacturer | Microtech Inc Dba Microtech Inc |
| Status | ACTIVE |
| FSC Application Data | ANTENNAS,WAVEGUIDES,AND RELATED EQUIPMENT |
| Tubing Wall Construction Style | SEAMLESS SINGLE TUBING SEGMENT |
| Flange Inside Height | 0.503 INCHES MINIMUM SINGLE FLANGE IN |
| Flange Quantity | 1 |
| Voltage Standing Wave Ratio | 1.25 |
| Adapter Overall Width | 1.610 INCHES MINIMUM AND 1.640 INCHES MAXIMUM IN |
| Style Designator | WAVEGUIDE TO COAXIAL |
| Waveguide Inside Width | 0.896 INCHES MINIMUM AND 0.904 INCHES MAXIMUM IN |
| Connector End Design | FEMALE |
| Cross-Sectional Shape Style | INTERNAL, RECTANGULAR EXTERNAL, RECTANGULAR |
| Flange Outside Height | 1.610 INCHES MINIMUM AND 1.640 INCHES MAXIMUM SINGLE FLANGE IN |
| Adapter Overall Height | 1.610 INCHES MINIMUM AND 1.640 INCHES MAXIMUM IN |
| Adapter Length | 1.266 INCHES MINIMUM AND 1.296 INCHES MAXIMUM IN |
| Flange Connecting Hole Diameter | 0.169 INCHES MINIMUM AND 0.172 INCHES MAXIMUM SINGLE FLANGE ALL CONNECTION FACILITIES IN |
| Flange Inside Width | 1.003 INCHES MINIMUM SINGLE FLANGE IN |
| Waveguide Outside Height | 0.496 INCHES MINIMUM AND 0.504 INCHES MAXIMUM IN |
| Waveguide Outside Width | 0.996 INCHES MINIMUM AND 1.004 INCHES MAXIMUM IN |
| Flange Depth | 0.423 INCHES MINIMUM AND 0.453 INCHES MAXIMUM SINGLE FLANGE IN |
| Flange Outside Width | 1.610 INCHES MINIMUM AND 1.640 INCHES MAXIMUM SINGLE FLANGE IN |
| Surface Treatment | CHROMATE SINGLE FLANGE ALL SURFACES |
| Surface Treatment | PAINT SINGLE TUBING SEGMENT AND FLANGE ALL SURFACES |
| Waveguide Inside Height | 0.396 INCHES MINIMUM AND 0.404 INCHES MAXIMUM IN |
| Adapter Height | 1.610 INCHES MINIMUM AND 1.640 INCHES MAXIMUM IN |
| Material | ALUMINUM ALLOY 6061 SINGLE TUBING SEGMENT AND FLANGE |
| Flange Connecting Facility and Quantity | 4 UNTHREADED HOLE(S) SINGLE FLANGE ALL CONNECTION FACILITIES |
| Flange Style | COVER TYPE SINGLE FLANGE |
| Coaxial Connector Series Designation | SMA |
| 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 |
|---|---|
| 900939-1 | Microtech Inc Dba Microtech Inc (USA) |
| 90AC559 | Microwave Development Laboratories, Inc. Dba Microwave Development Laboratories Inc (USA) |
| KCII/1200 | Koehlke Components Inc (USA) |
| MDC95130-SF-90-1 | Dal-Tech Devices, Inc. Dba Dal-Tech Devices Inc Div Dal-Tec Devices, Inc (USA) |
| 900939-1 | Frontgrade Technologies Inc. (USA) |
| Reference | Meaning |
|---|---|
| 900939-1 | 5/9 Secondary reference Advanced Technical Materials, Inc. Dba a T M |
| 900939-1 | 3/2 Design control — primary reference U.S. Government activity |
| RME-U-0174 | 5/9 Secondary reference Rme Filters Inc |
| 2000-5008-00 | 5/9 Secondary reference U.S. Government activity |
| 900939-1 | 5/9 Secondary reference Astro Microwave Inc |
NSN 5985-00-177-8635 is a Adapter,waveguide, manufactured by Microtech Inc Dba Microtech Inc, classified under FSC 5985, Antennas, Waveguides, and Related Equipment. Status: active.
NSN 5985-00-177-8635 has 5 manufacturer part numbers on file: 900939-1 (Microtech Inc Dba Microtech Inc), 90AC559 (Microwave Development Laboratories, Inc. Dba Microwave Development Laboratories Inc), KCII/1200 (Koehlke Components Inc), MDC95130-SF-90-1 (Dal-Tech Devices, Inc. Dba Dal-Tech Devices Inc Div Dal-Tec Devices, Inc), 900939-1 (Frontgrade Technologies Inc.).
1 possible match (shared part number, not a government interchangeability claim): 5935-00-936-5281. Verify interchangeability with system specifications before substitution.
Key specifications for 900939-1: FSC Application Data: ANTENNAS,WAVEGUIDES,AND RELATED EQUIPMENT; Tubing Wall Construction Style: SEAMLESS SINGLE TUBING SEGMENT; Flange Inside Height: 0.503 INCHES MINIMUM SINGLE FLANGE IN; Flange Quantity: 1. 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 5985-00-177-8635 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.