The Waveguide Assembly, cataloged under National Stock Number 5985-00-276-3338, is classified within Federal Supply Class 5985 (Antennas, Waveguides, and Related Equipment) of the Electrical and Electronic Equipment Components group. Government technical data includes 30 specifications, cited from the U.S. Government catalog. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5985-00-276-3338 |
| Item Name | Waveguide Assembly |
| FSC / FSG | 5985 / 59 — Antennas, Waveguides, and Related Equipment |
| Status | ACTIVE |
| Tubing Wall Construction Style | SEAMLESS SINGLE TUBING SEGMENT |
| Flange Inside Height | 0.622 INCHES NOMINAL FIRST FLANGE IN |
| Flange Inside Height | 0.753 INCHES NOMINAL SECOND FLANGE IN |
| Flange Quantity | 2 |
| Bend Angle in Deg | 45.0 SINGLE BEND E-PLANE |
| Style Designator | BEND TYPE |
| Waveguide Offset Distance | 4.196 INCHES NOMINAL IN |
| Flexibility | RIGID SINGLE TUBING SEGMENT |
| Waveguide Inside Width | 1.372 INCHES NOMINAL IN |
| Cross-Sectional Shape Style | INTERNAL, RECTANGULAR EXTERNAL, RECTANGULAR |
| Flange Connecting Hole Diameter | 0.199 INCHES NOMINAL SECOND FLANGE ALL CONNECTION FACILITIES IN |
| Flange Inside Width | 1.372 INCHES NOMINAL FIRST FLANGE IN |
| Flange Inside Width | 1.503 INCHES NOMINAL SECOND FLANGE IN |
| Thread Direction | RIGHT-HAND FIRST FLANGE ALL CONNECTION FACILITIES |
| Nominal Thread Size | 0.190 INCHES FIRST FLANGE ALL CONNECTION FACILITIES IN |
| Waveguide Outside Height | 0.750 INCHES NOMINAL IN |
| Waveguide Outside Width | 1.500 INCHES NOMINAL IN |
| Flange Depth | 0.375 INCHES NOMINAL SECOND FLANGE IN |
| Flange Depth | 0.750 INCHES NOMINAL FIRST FLANGE IN |
| Waveguide Inside Height | 0.622 INCHES NOMINAL IN |
| Thread Class | 2B FIRST FLANGE ALL CONNECTION FACILITIES |
| Thread Quantity Per Inch | 32 FIRST FLANGE ALL CONNECTION FACILITIES |
| Material | ALUMINUM SINGLE TUBING SEGMENT |
| Flange Connecting Facility and Quantity | 6 THREADED HOLE(S) FIRST FLANGE ALL CONNECTION FACILITIES |
| Flange Connecting Facility and Quantity | 6 UNTHREADED HOLE(S) SECOND FLANGE ALL CONNECTION FACILITIES |
| Flange Outside Diameter | 3.125 INCHES NOMINAL SECOND FLANGE IN |
| Flange Outside Diameter | 3.125 INCHES NOMINAL FIRST FLANGE IN |
| Thread Series Designator | UNF FIRST FLANGE ALL CONNECTION FACILITIES |
| Flange Style | CHOKE TYPE FIRST FLANGE |
| Flange Style | COVER TYPE SECOND FLANGE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| MIL-W-3970/5 | 4/1 Identification reference U.S. Government activity |
| UG-741/U | 5/1 Secondary reference U.S. Government activity |
| RE49D656TYPEUG741U | 5/1 Secondary reference U.S. Government activity |
| RE49D656 | 5/1 Secondary reference U.S. Government activity |
| M3970/5-014 | 2/2 Government specification standardization U.S. Government activity |
NSN 5985-00-276-3338 is a Waveguide Assembly, classified under FSC 5985, Antennas, Waveguides, and Related Equipment. Status: active.
2 possible matches (shared part number, not a government interchangeability claim): 5985-00-296-1780, 5985-00-765-1239. Verify interchangeability with system specifications before substitution.
Key specifications for 5985-00-276-3338: Tubing Wall Construction Style: SEAMLESS SINGLE TUBING SEGMENT; Flange Inside Height: 0.622 INCHES NOMINAL FIRST FLANGE IN; Flange Inside Height: 0.753 INCHES NOMINAL SECOND FLANGE IN; Flange Quantity: 2. 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.
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.