The Waveguide Assembly, cataloged under National Stock Number 5985-01-072-9981, 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 L3harris Technologies, Inc Div Space & Airborne Systems. Government technical data includes 28 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. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5985-01-072-9981 |
| Primary Part Number | 140837-1 |
| Item Name | Waveguide Assembly |
| FSC / FSG | 5985 / 59 — Antennas, Waveguides, and Related Equipment |
| Manufacturer | L3harris Technologies, Inc Div Space & Airborne Systems |
| Status | ACTIVE |
| Tubing Wall Construction Style | CORRUGATED SINGLE TUBING SEGMENT |
| Flange Inside Height | 0.400 INCHES MINIMUM AND 0.508 INCHES MAXIMUM ALL FLANGES IN |
| Flange Quantity | 2 |
| Style Designator | OFFSET BEND TYPE |
| Flexibility | FLEXIBLE SINGLE TUBING SEGMENT |
| Waveguide Inside Width | 0.900 INCHES NOMINAL IN |
| Cross-Sectional Shape Style | INTERNAL, RECTANGULAR EXTERNAL, RECTANGULAR |
| Flange Outside Height | 1.625 INCHES NOMINAL ALL FLANGES IN |
| Flange Connecting Hole Diameter | 0.172 INCHES NOMINAL SECOND FLANGE SINGLE CONNECTION FACILITY IN |
| Waveguide Center to Center Distance | 1.090 INCHES NOMINAL IN |
| Flange Inside Width | 0.900 INCHES MINIMUM AND 1.008 INCHES MAXIMUM ALL FLANGES IN |
| Thread Direction | RIGHT-HAND FIRST FLANGE SINGLE CONNECTION FACILITY |
| Waveguide Length | 5.110 INCHES NOMINAL IN |
| Nominal Thread Size | 0.164 INCHES FIRST FLANGE SINGLE CONNECTION FACILITY IN |
| Waveguide Outside Height | 0.500 INCHES NOMINAL IN |
| Waveguide Outside Width | 1.000 INCHES NOMINAL IN |
| Flange Depth | 0.438 INCHES NOMINAL ALL FLANGES IN |
| Flange Outside Width | 1.625 INCHES NOMINAL ALL FLANGES IN |
| Tubing Twist Angle in Deg | 90.0 SINGLE TUBING SEGMENT |
| Waveguide Inside Height | 0.400 INCHES NOMINAL IN |
| Thread Class | 2B FIRST FLANGE SINGLE CONNECTION FACILITY |
| Thread Quantity Per Inch | 32 FIRST FLANGE SINGLE CONNECTION FACILITY |
| Material | ALUMINUM ALLOY SINGLE FLANGE |
| Flange Connecting Facility and Quantity | 4 THREADED HOLE(S) FIRST FLANGE SINGLE CONNECTION FACILITY |
| Flange Connecting Facility and Quantity | 4 UNTHREADED HOLE(S) SECOND FLANGE SINGLE CONNECTION FACILITY |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) FIRST FLANGE SINGLE CONNECTION FACILITY |
| Flange Style | CHOKE TYPE FIRST FLANGE |
| Flange Style | COVER TYPE SECOND FLANGE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL D — Destroy Item |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
NSN 5985-01-072-9981 is a Waveguide Assembly, manufactured by L3harris Technologies, Inc Div Space & Airborne Systems, classified under FSC 5985, Antennas, Waveguides, and Related Equipment. Status: active.
NSN 5985-01-072-9981 has 2 manufacturer part numbers on file: 140837-1 (Microtech Inc Dba Microtech Inc), 140837-1 (L3harris Technologies, Inc Div Space & Airborne Systems).
1 possible match (shared part number, not a government interchangeability claim): 5365-01-439-0838. Verify interchangeability with system specifications before substitution.
Key specifications for 140837-1: Tubing Wall Construction Style: CORRUGATED SINGLE TUBING SEGMENT; Flange Inside Height: 0.400 INCHES MINIMUM AND 0.508 INCHES MAXIMUM ALL FLANGES IN; Flange Quantity: 2; Style Designator: OFFSET BEND TYPE. 28 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 5985-01-072-9981 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.