The Waveguide Assembly, cataloged under National Stock Number 5985-01-187-4950, 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 Naval Sea Systems Command. Government technical data includes 30 specifications, cited from the U.S. Government catalog. The record lists 4 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5985-01-187-4950 |
| Primary Part Number | 5186905 |
| Item Name | Waveguide Assembly |
| FSC / FSG | 5985 / 59 — Antennas, Waveguides, and Related Equipment |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| FSC Application Data | ANTENNAS,WAVEGUIDES,AND RELATED EQUIPMENT |
| Tubing Wall Construction Style | SEAMLESS ALL TUBING SEGMENT |
| Flange Inside Height | 0.372 INCHES MINIMUM AND 0.378 INCHES MAXIMUM FIRST FLANGE IN |
| Flange Inside Height | 0.479 INCHES MINIMUM AND 0.481 INCHES MAXIMUM SECOND FLANGE IN |
| Flange Quantity | 2 |
| Voltage Standing Wave Ratio | 1.15 |
| Waveguide First Leg Length | 1.000 INCHES NOMINAL IN |
| Waveguide Second Leg Length | 14.120 INCHES NOMINAL IN |
| Bend Angle in Deg | 90.0 FIRST BEND H-PLANE |
| Bend Angle in Deg | 90.0 THIRD BEND E-PLANE |
| Bend Angle in Deg | 90.0 SECOND BEND E-PLANE |
| Style Designator | THREE BEND TYPE |
| Flexibility | RIGID ALL TUBING SEGMENT |
| Flange Inside Diameter | 1.126 INCHES MINIMUM AND 1.156 INCHES MAXIMUM FIRST FLANGE IN |
| Waveguide Inside Width | 0.747 INCHES MINIMUM AND 0.753 INCHES MAXIMUM IN |
| Cross-Sectional Shape Style | INTERNAL, RECTANGULAR EXTERNAL, RECTANGULAR |
| Operating Pressure | 10.0 POUNDS PER SQUARE INCH GAUGE (PSIG) MAXIMUM LBS |
| Flange Outside Height | 1.485 INCHES MINIMUM AND 1.515 INCHES MAXIMUM SECOND FLANGE IN |
| Flange Outside Height | 1.485 INCHES MINIMUM AND 1.515 INCHES MAXIMUM FIRST FLANGE IN |
| Flange Connecting Hole Diameter | 0.144 INCHES MINIMUM AND 0.147 INCHES MAXIMUM SECOND FLANGE ALL CONNECTION FACILITIES IN |
| Flange Inside Width | 0.747 INCHES MINIMUM AND 0.753 INCHES MAXIMUM FIRST FLANGE IN |
| Flange Inside Width | 0.854 INCHES MINIMUM AND 0.856 INCHES MAXIMUM SECOND FLANGE IN |
| Thread Direction | RIGHT-HAND FIRST FLANGE ALL CONNECTION FACILITIES |
| Nominal Thread Size | 0.138 INCHES FIRST FLANGE ALL CONNECTION FACILITIES IN |
| Waveguide Outside Height | 0.472 INCHES MINIMUM AND 0.478 INCHES MAXIMUM IN |
| Waveguide Outside Width | 0.847 INCHES MINIMUM AND 0.853 INCHES MAXIMUM IN |
| Flange Depth | 0.485 INCHES MINIMUM AND 0.515 INCHES MAXIMUM FIRST FLANGE IN |
| Flange Depth | 0.376 INCHES MINIMUM AND 0.406 INCHES MAXIMUM SECOND FLANGE IN |
| Flange Outside Width | 1.485 INCHES MINIMUM AND 1.515 INCHES MAXIMUM SECOND FLANGE IN |
| Flange Outside Width | 1.485 INCHES MINIMUM AND 1.515 INCHES MAXIMUM FIRST FLANGE IN |
| 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 |
|---|---|
| 5186905 PRIMARY | Naval Sea Systems Command (USA) |
| 5186905 | 3dbm Co Inc Waveguide Group (USA) |
| 5186905 | British Sarozal Ltd (GBR) |
| 5186905 | Frontgrade Technologies Inc. (USA) |
| Reference | Meaning |
|---|---|
| 5985PL1327167 | 6/9 Informative reference only Jednolity Indeks Materialowy - Uniform Material Index |
NSN 5985-01-187-4950 is a Waveguide Assembly, manufactured by Naval Sea Systems Command, classified under FSC 5985, Antennas, Waveguides, and Related Equipment. Status: active.
NSN 5985-01-187-4950 has 4 manufacturer part numbers on file: 5186905 (Naval Sea Systems Command), 5186905 (3dbm Co Inc Waveguide Group), 5186905 (British Sarozal Ltd), 5186905 (Frontgrade Technologies Inc.).
Key specifications for 5186905: FSC Application Data: ANTENNAS,WAVEGUIDES,AND RELATED EQUIPMENT; Tubing Wall Construction Style: SEAMLESS ALL TUBING SEGMENT; Flange Inside Height: 0.372 INCHES MINIMUM AND 0.378 INCHES MAXIMUM FIRST FLANGE IN; Flange Inside Height: 0.479 INCHES MINIMUM AND 0.481 INCHES MAXIMUM SECOND FLANGE IN. 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 5985-01-187-4950 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.