The Waveguide Assembly, cataloged under National Stock Number 5985-01-438-4894, 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 29 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5985-01-438-4894 |
| Primary Part Number | 70600-81850-104 |
| 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 | SEAMLESS THIRD TUBING SEGMENT |
| Tubing Wall Construction Style | SEAMLESS FIRST TUBING SEGMENT |
| Tubing Wall Construction Style | INTERLOCKED SECOND TUBING SEGMENT |
| Flange Inside Height | 0.395 INCHES NOMINAL SECOND FLANGE IN |
| Flange Quantity | 2 |
| Voltage Standing Wave Ratio | 1.15 |
| Flexibility | RIGID THIRD TUBING SEGMENT |
| Flexibility | FLEXIBLE SECOND TUBING SEGMENT |
| Flexibility | RIGID FIRST TUBING SEGMENT |
| Waveguide Inside Width | 0.998 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 | 1.635 INCHES NOMINAL SECOND FLANGE IN |
| Flange Connecting Hole Diameter | 0.168 INCHES NOMINAL FIRST FLANGE FIRST CONNECTION FACILITY IN |
| Flange Inside Width | 0.427 INCHES NOMINAL SECOND FLANGE IN |
| Thread Direction | RIGHT-HAND SECOND FLANGE SECOND CONNECTION FACILITY |
| Nominal Thread Size | 0.162 INCHES SECOND FLANGE SECOND CONNECTION FACILITY IN |
| Specified Frequency | 9.4 GIGAHERTZ MAXIMUM |
| Waveguide Outside Height | 0.507 INCHES NOMINAL IN |
| Waveguide Outside Width | 1.010 INCHES NOMINAL IN |
| Flange Depth | 0.320 INCHES NOMINAL SECOND FLANGE IN |
| Flange Outside Width | 1.625 INCHES NOMINAL SECOND FLANGE IN |
| Tubing Twist Type | STRAIGHT TWIST SECOND TUBING SEGMENT |
| Tubing Twist Angle in Deg | 90.0 SECOND TUBING SEGMENT |
| Insertion Loss in Decibels | 0.30 |
| Surface Treatment | PAINT FIRST TUBING SEGMENT AND FLANGE OUTSIDE SURFACES |
| Surface Treatment | PAINT THIRD TUBING SEGMENT AND FLANGE OUTSIDE SURFACES |
| Surface Treatment | PLASTIC VINYL SECOND TUBING SEGMENT OUTSIDE SURFACES |
| Surface Treatment | SILVER SECOND TUBING SEGMENT INSIDE SURFACES |
| 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 |
|---|---|
| 70600-81850-104 | Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp (USA) |
| Reference | Meaning |
|---|---|
| 127130 | 3/9 Design control — primary reference U.S. Government activity |
NSN 5985-01-438-4894 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 5985-01-438-4894 has 1 manufacturer part number on file: 70600-81850-104 (Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp).
Key specifications for 70600-81850-104: Tubing Wall Construction Style: SEAMLESS THIRD TUBING SEGMENT; Tubing Wall Construction Style: SEAMLESS FIRST TUBING SEGMENT; Tubing Wall Construction Style: INTERLOCKED SECOND TUBING SEGMENT; Flange Inside Height: 0.395 INCHES NOMINAL SECOND FLANGE IN. 29 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 5985-01-438-4894 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.