The Waveguide Assembly, cataloged under National Stock Number 5985-01-030-9976, 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 Microlab/fxr Llc. Government technical data includes 30 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5985-01-030-9976 |
| Primary Part Number | 624-A81 |
| Item Name | Waveguide Assembly |
| FSC / FSG | 5985 / 59 — Antennas, Waveguides, and Related Equipment |
| Manufacturer | Microlab/fxr Llc |
| Status | ACTIVE |
| Tubing Wall Construction Style | CORRUGATED SINGLE TUBING SEGMENT |
| Flange Inside Height | 0.628 INCHES NOMINAL SECOND FLANGE IN |
| Flange Inside Height | 0.628 INCHES NOMINAL FIRST FLANGE IN |
| Waveguide Height | 5.680 INCHES NOMINAL IN |
| Flange Quantity | 2 |
| Precious Material | SILVER |
| Waveguide Leg Length | 4.016 INCHES NOMINAL IN |
| Bend Angle in Deg | 90.0 FIRST BEND E-PLANE |
| Bend Angle in Deg | 90.0 SECOND BEND H-PLANE |
| Bend Angle in Deg | 90.0 THIRD BEND H-PLANE |
| Bend Angle in Deg | 45.0 FIFTH BEND E-PLANE |
| Bend Angle in Deg | 45.0 FOURTH BEND E-PLANE |
| Style Designator | U-BEND TYPE |
| Flexibility | FLEXIBLE ALL TUBING SEGMENT |
| Waveguide Inside Width | 1.122 INCHES NOMINAL IN |
| Cross-Sectional Shape Style | INTERNAL, RECTANGULAR EXTERNAL, RECTANGULAR |
| Operating Pressure | 45.0 POUNDS PER SQUARE INCH GAUGE (PSIG) MAXIMUM LBS |
| Flange Outside Height | 1.875 INCHES NOMINAL SECOND FLANGE IN |
| Flange Outside Height | 1.875 INCHES NOMINAL FIRST FLANGE IN |
| Flange Connecting Hole Diameter | 0.169 INCHES NOMINAL FIRST FLANGE SINGLE CONNECTION FACILITY IN |
| Waveguide Center to Center Distance | 7.060 INCHES NOMINAL IN |
| Flange Inside Width | 1.253 INCHES NOMINAL FIRST FLANGE IN |
| Flange Inside Width | 1.253 INCHES NOMINAL SECOND FLANGE IN |
| Thread Direction | RIGHT-HAND SECOND FLANGE SINGLE CONNECTION FACILITY |
| Nominal Thread Size | 0.164 INCHES SECOND FLANGE SINGLE CONNECTION FACILITY IN |
| Waveguide Outside Height | 0.665 INCHES NOMINAL IN |
| Waveguide Outside Width | 1.359 INCHES NOMINAL IN |
| Flange Depth | 0.438 INCHES NOMINAL FIRST FLANGE IN |
| Flange Depth | 0.438 INCHES NOMINAL SECOND FLANGE IN |
| Flange Outside Width | 1.875 INCHES NOMINAL SECOND 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 |
|---|---|
| 624-A81 | Microlab/fxr Llc (USA) |
| SM-D-719418 | Microwave Engineering Corporation (USA) |
| Reference | Meaning |
|---|---|
| SM-D-719418 | 5/9 Secondary reference Lockheed Martin Corporation Div Lockheed Martin Information Systems & Global Solutions |
| SM-D-719418 | 3/2 Design control — primary reference U.S. Government activity |
| SM-A-723237 | 5/2 Secondary reference U.S. Government activity |
NSN 5985-01-030-9976 is a Waveguide Assembly, manufactured by Microlab/fxr Llc, classified under FSC 5985, Antennas, Waveguides, and Related Equipment. Status: active.
NSN 5985-01-030-9976 has 2 manufacturer part numbers on file: 624-A81 (Microlab/fxr Llc), SM-D-719418 (Microwave Engineering Corporation).
Key specifications for 624-A81: Tubing Wall Construction Style: CORRUGATED SINGLE TUBING SEGMENT; Flange Inside Height: 0.628 INCHES NOMINAL SECOND FLANGE IN; Flange Inside Height: 0.628 INCHES NOMINAL FIRST FLANGE IN; Waveguide Height: 5.680 INCHES NOMINAL 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 5985-01-030-9976 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.