The Waveguide Assembly, cataloged under National Stock Number 5985-01-187-4956, 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 18 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5985-01-187-4956 |
| Primary Part Number | 5187980 |
| Item Name | Waveguide Assembly |
| FSC / FSG | 5985 / 59 — Antennas, Waveguides, and Related Equipment |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Tubing Wall Construction Style | SEAMLESS ALL TUBING SEGMENT |
| Flange Quantity | 2 |
| Voltage Standing Wave Ratio | 1.15 |
| Waveguide First Leg Length | 2.095 INCHES MINIMUM AND 2.125 INCHES MAXIMUM IN |
| Waveguide Second Leg Length | 2.000 INCHES NOMINAL IN |
| Style Designator | FOUR BEND TYPE |
| Flexibility | RIGID ALL TUBING SEGMENT |
| Cross-Sectional Shape Style | INTERNAL, RECTANGULAR EXTERNAL, RECTANGULAR |
| Operating Pressure | 10.0 POUNDS PER SQUARE INCH GAUGE (PSIG) MAXIMUM LBS |
| Flange Connecting Hole Diameter | 0.144 INCHES MINIMUM AND 0.147 INCHES MAXIMUM ALL FLANGES ALL CONNECTION FACILITIES IN |
| Waveguide Fourth Leg Length | 1.485 INCHES MINIMUM AND 1.515 INCHES MAXIMUM IN |
| Waveguide Fifth Leg Length | 1.250 INCHES NOMINAL IN |
| Insertion Loss in Decibels | 0.20 |
| Surface Treatment | CHROMATE ALL TUBING SEGMENT AND FLANGE OUTSIDE SURFACES |
| Material | METAL ALL TUBING SEGMENT AND FLANGE |
| Flange Connecting Facility and Quantity | 4 UNTHREADED HOLE(S) ALL FLANGES ALL CONNECTION FACILITIES |
| Flange Style | CHOKE TYPE ALL FLANGES |
| Waveguide Third Leg Length | 2.677 INCHES MINIMUM AND 2.707 INCHES MAXIMUM IN |
| 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 |
|---|---|
| 5187980 PRIMARY | Naval Sea Systems Command (USA) |
| 5187980 | Raytheon Company (USA) |
| 5187980 | Microtech Inc Dba Microtech Inc (USA) |
| Reference | Meaning |
|---|---|
| 5985PL0987965 | 6/9 Informative reference only Jednolity Indeks Materialowy - Uniform Material Index |
| 5187980 | 5/9 Secondary reference Astro Microwave Inc |
NSN 5985-01-187-4956 is a Waveguide Assembly, manufactured by Naval Sea Systems Command, classified under FSC 5985, Antennas, Waveguides, and Related Equipment. Status: active.
NSN 5985-01-187-4956 has 3 manufacturer part numbers on file: 5187980 (Naval Sea Systems Command), 5187980 (Raytheon Company), 5187980 (Microtech Inc Dba Microtech Inc).
Key specifications for 5187980: Tubing Wall Construction Style: SEAMLESS ALL TUBING SEGMENT; Flange Quantity: 2; Voltage Standing Wave Ratio: 1.15; Waveguide First Leg Length: 2.095 INCHES MINIMUM AND 2.125 INCHES MAXIMUM IN. 18 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 5985-01-187-4956 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.