The Waveguide Assembly, cataloged under National Stock Number 5985-01-255-8920, 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 Microwave Techniques Llc. Government technical data includes 20 specifications, cited from the U.S. Government catalog. The record lists 2 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5985-01-255-8920 |
| Primary Part Number | 49753-301 |
| Item Name | Waveguide Assembly |
| FSC / FSG | 5985 / 59 — Antennas, Waveguides, and Related Equipment |
| Manufacturer | Microwave Techniques Llc |
| Status | ACTIVE |
| Flange Inside Height | 1.625 INCHES NOMINAL SECOND FLANGE IN |
| Flange Inside Height | 1.625 INCHES NOMINAL FIRST FLANGE IN |
| Flange Quantity | 2 |
| Style Designator | STRAIGHT TYPE |
| Flexibility | FLEXIBLE SINGLE TUBING SEGMENT |
| Waveguide Inside Width | 6.500 INCHES NOMINAL IN |
| Flange Outside Height | 3.625 INCHES NOMINAL SECOND FLANGE IN |
| Flange Outside Height | 6.000 INCHES NOMINAL FIRST FLANGE IN |
| Flange Connecting Hole Diameter | 0.164 INCHES NOMINAL FIRST FLANGE SINGLE CONNECTION FACILITY IN |
| Flange Connecting Hole Diameter | 0.278 INCHES NOMINAL SECOND FLANGE SINGLE CONNECTION FACILITY IN |
| Flange Inside Width | 6.500 INCHES NOMINAL FIRST FLANGE IN |
| Flange Inside Width | 6.500 INCHES NOMINAL SECOND FLANGE IN |
| Waveguide Length | 4.538 INCHES NOMINAL IN |
| Flange Depth | 0.500 INCHES NOMINAL SECOND FLANGE IN |
| Flange Outside Width | 10.875 INCHES NOMINAL FIRST FLANGE IN |
| Flange Outside Width | 8.500 INCHES NOMINAL SECOND FLANGE IN |
| Waveguide Inside Height | 1.625 INCHES NOMINAL IN |
| Material | ALUMINUM ALLOY SINGLE FLANGE |
| Flange Connecting Facility and Quantity | 8 UNTHREADED HOLE(S) SECOND FLANGE SINGLE CONNECTION FACILITY |
| Flange Connecting Facility and Quantity | 4 UNTHREADED HOLE(S) FIRST FLANGE SINGLE CONNECTION FACILITY |
| 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 |
|---|---|
| 2930689-1 | Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier (USA) |
| 49753-301 PRIMARY | Microwave Techniques Llc (USA) |
| Reference | Meaning |
|---|---|
| 48405 | 5/9 Secondary reference Mega Industries Inc Mega Microwave Div |
| 48405 | 5/9 Secondary reference Microwave Techniques Llc |
NSN 5985-01-255-8920 is a Waveguide Assembly, manufactured by Microwave Techniques Llc, classified under FSC 5985, Antennas, Waveguides, and Related Equipment. Status: active.
NSN 5985-01-255-8920 has 2 manufacturer part numbers on file: 2930689-1 (Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier), 49753-301 (Microwave Techniques Llc).
Key specifications for 49753-301: Flange Inside Height: 1.625 INCHES NOMINAL SECOND FLANGE IN; Flange Inside Height: 1.625 INCHES NOMINAL FIRST FLANGE IN; Flange Quantity: 2; Style Designator: STRAIGHT TYPE. 20 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 5985-01-255-8920 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.