The Waveguide Assembly, cataloged under National Stock Number 5985-01-438-1185, 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 Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp. Government technical data includes 28 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5985-01-438-1185 |
| Primary Part Number | 70600-81850-105 |
| Item Name | Waveguide Assembly |
| FSC / FSG | 5985 / 59 — Antennas, Waveguides, and Related Equipment |
| Manufacturer | Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp |
| Status | ACTIVE |
| Tubing Wall Construction Style | BELLOWS SECOND TUBING SEGMENT |
| Tubing Wall Construction Style | SEAMLESS FIRST TUBING SEGMENT |
| Flange Inside Height | 0.400 INCHES NOMINAL FIRST FLANGE IN |
| Flange Quantity | 2 |
| Voltage Standing Wave Ratio | 1.15 |
| Flexibility | RIGID ALL TUBING SEGMENT |
| Waveguide Inside Width | 0.900 INCHES NOMINAL IN |
| Cross-Sectional Shape Style | INTERNAL, RECTANGULAR EXTERNAL, RECTANGULAR |
| Operating Pressure | 10.0 POUNDS PER SQUARE INCH GAUGE (PSIG) MAXIMUM LBS |
| Flange Outside Height | 1.526 INCHES NOMINAL FIRST FLANGE IN |
| Flange Connecting Hole Diameter | 0.165 INCHES NOMINAL SECOND FLANGE SECOND CONNECTION FACILITY IN |
| Flange Inside Width | 0.891 INCHES NOMINAL FIRST FLANGE IN |
| Thread Direction | RIGHT-HAND FIRST FLANGE FIRST CONNECTION FACILITY |
| Nominal Thread Size | 0.162 INCHES FIRST FLANGE FIRST CONNECTION FACILITY IN |
| Specified Frequency | 9.4 GIGAHERTZ MAXIMUM |
| Waveguide Outside Height | 0.500 INCHES NOMINAL IN |
| Waveguide Outside Width | 1.012 INCHES NOMINAL IN |
| Flange Depth | 0.180 INCHES NOMINAL FIRST FLANGE IN |
| Flange Outside Width | 1.630 INCHES NOMINAL FIRST FLANGE IN |
| Insertion Loss in Decibels | 0.30 |
| Surface Treatment | PAINT FIRST TUBING SEGMENT AND FLANGE OUTSIDE SURFACES |
| Surface Treatment | PAINT SECOND FLANGE OUTSIDE SURFACES |
| Surface Treatment | PLASTIC VINYL SECOND TUBING SEGMENT OUTSIDE SURFACES |
| Waveguide Inside Height | 0.400 INCHES NOMINAL IN |
| Thread Class | 2A FIRST FLANGE FIRST CONNECTION FACILITY A |
| Material | ALUMINUM FIRST TUBING SEGMENT AND FLANGE |
| Flange Connecting Facility and Quantity | 4 UNTHREADED HOLE(S) SECOND FLANGE SECOND CONNECTION FACILITY |
| Flange Connecting Facility and Quantity | 4 CAPTIVE SCREW(S) FIRST FLANGE FIRST CONNECTION FACILITY |
| 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 |
|---|---|
| 70600-81850-105 | Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp (USA) |
| Reference | Meaning |
|---|---|
| 127131 | 3/9 Design control — primary reference U.S. Government activity |
NSN 5985-01-438-1185 is a Waveguide Assembly, manufactured by Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp, classified under FSC 5985, Antennas, Waveguides, and Related Equipment. Status: active.
NSN 5985-01-438-1185 has 1 manufacturer part number on file: 70600-81850-105 (Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp).
Key specifications for 70600-81850-105: Tubing Wall Construction Style: BELLOWS SECOND TUBING SEGMENT; Tubing Wall Construction Style: SEAMLESS FIRST TUBING SEGMENT; Flange Inside Height: 0.400 INCHES NOMINAL FIRST FLANGE IN; Flange Quantity: 2. 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 5985-01-438-1185 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.