The Waveguide Assembly, cataloged under National Stock Number 5985-01-088-5419, 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 L3 Technologies, Inc. Div L3 Keo. Government technical data includes 29 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5985-01-088-5419 |
| Primary Part Number | 055988 |
| Item Name | Waveguide Assembly |
| FSC / FSG | 5985 / 59 — Antennas, Waveguides, and Related Equipment |
| Manufacturer | L3 Technologies, Inc. Div L3 Keo |
| Status | ACTIVE |
| FSC Application Data | ANTENNAS,WAVEGUIDES,AND RELATED EQUIPMENT |
| Tubing Wall Construction Style | SEAMLESS ALL TUBING SEGMENTSEAMLESS ALL TUBING SEGMENT |
| Flange Inside Height | 0.396 INCHES MINIMUM AND 0.396 INCHES MINIMUM AND 0.404 INCHES MAXIMUM FIRST FLANGE0.404 INCHES MAXIMUM FIRST FLANGE IN |
| Flange Inside Height | 0.503 INCHES MINIMUM AND 0.503 INCHES MINIMUM AND 0.506 INCHES MAXIMUM SECOND FLANGE0.506 INCHES MAXIMUM SECOND FLANGE IN |
| Flange Quantity | 22 |
| Voltage Standing Wave Ratio | 1.101.10 |
| Flexibility | FLEXIBLE FIRST TUBING SEGMENT |
| Flexibility | RIGID SECOND TUBING SEGMENT |
| Flange Inside Diameter | 1.407 INCHES MINIMUM AND 1.407 INCHES MINIMUM AND 1.437 INCHES MAXIMUM FIRST FLANGE1.437 INCHES MAXIMUM FIRST FLANGE IN |
| Waveguide Inside Width | 0.896 INCHES MINIMUM AND 0.896 INCHES MINIMUM AND 0.904 INCHES MAXIMUM0.904 INCHES MAXIMUM IN |
| Cross-Sectional Shape Style | INTERNAL, RECTANGULAR EXTERNAL, RECTANGULARINTERNAL, RECTANGULAR EXTERNAL, RECTANGULAR |
| Flange Outside Height | 1.610 INCHES MINIMUM AND 1.610 INCHES MINIMUM AND 1.640 INCHES MAXIMUM SECOND FLANGE1.640 INCHES MAXIMUM SECOND FLANGE IN |
| Flange Outside Height | 1.610 INCHES MINIMUM AND 1.610 INCHES MINIMUM AND 1.640 INCHES MAXIMUM FIRST FLANGE1.640 INCHES MAXIMUM FIRST FLANGE IN |
| Flange Connecting Hole Diameter | 0.169 INCHES MINIMUM AND 0.169 INCHES MINIMUM AND 0.172 INCHES MAXIMUM SECOND FLANGE SINGLE CONNECTION FACILITY0.172 INCHES MAXIMUM SECOND FLANGE SINGLE CONNECTION FACILITY IN |
| Flange Inside Width | 0.896 INCHES MINIMUM AND 0.896 INCHES MINIMUM AND 0.904 INCHES MAXIMUM FIRST FLANGE0.904 INCHES MAXIMUM FIRST FLANGE IN |
| Flange Inside Width | 1.003 INCHES MINIMUM AND 1.003 INCHES MINIMUM AND 1.006 INCHES MAXIMUM SECOND FLANGE1.006 INCHES MAXIMUM SECOND FLANGE IN |
| Thread Direction | RIGHT-HAND FIRST FLANGE SINGLE CONNECTION FACILITYRIGHT-HAND FIRST FLANGE SINGLE CONNECTION FACILITY |
| Nominal Thread Size | 0.164 INCHES FIRST FLANGE SINGLE CONNECTION FACILITY0.164 INCHES FIRST FLANGE SINGLE CONNECTION FACILITY IN |
| Waveguide Outside Height | 0.496 INCHES MINIMUM AND 0.496 INCHES MINIMUM AND 0.504 INCHES MAXIMUM0.504 INCHES MAXIMUM IN |
| Waveguide Outside Width | 0.996 INCHES MINIMUM AND 0.996 INCHES MINIMUM AND 1.004 INCHES MAXIMUM1.004 INCHES MAXIMUM IN |
| Flange Depth | 0.423 INCHES MINIMUM AND 0.423 INCHES MINIMUM AND 0.453 INCHES MAXIMUM SECOND FLANGE0.453 INCHES MAXIMUM SECOND FLANGE IN |
| Flange Depth | 0.423 INCHES MINIMUM AND 0.423 INCHES MINIMUM AND 0.453 INCHES MAXIMUM FIRST FLANGE0.453 INCHES MAXIMUM FIRST FLANGE IN |
| Flange Outside Width | 1.610 INCHES MINIMUM AND 1.610 INCHES MINIMUM AND 1.640 INCHES MAXIMUM SECOND FLANGE1.640 INCHES MAXIMUM SECOND FLANGE IN |
| Flange Outside Width | 1.610 INCHES MINIMUM AND 1.610 INCHES MINIMUM AND 1.640 INCHES MAXIMUM FIRST FLANGE1.640 INCHES MAXIMUM FIRST FLANGE IN |
| Insertion Loss in Decibels | 0.500.50 |
| Waveguide Inside Height | 0.396 INCHES MINIMUM AND 0.396 INCHES MINIMUM AND 0.404 INCHES MAXIMUM0.404 INCHES MAXIMUM IN |
| Thread Class | 2B FIRST FLANGE SINGLE CONNECTION FACILITY2B FIRST FLANGE SINGLE CONNECTION FACILITY |
| Material | COPPER ALLOY ALL FLANGE |
| Flange Connecting Facility and Quantity | 4 THREADED HOLE(S) FIRST FLANGE SINGLE CONNECTION FACILITY4 THREADED 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 |
|---|---|
| 934F055988 | Microtech Inc Dba Microtech Inc (USA) |
| 055988 PRIMARY | L3 Technologies, Inc. Div L3 Keo (USA) |
| 934F055988 | Microwave Engineering Corporation (USA) |
| Reference | Meaning |
|---|---|
| 934F055988 | 5/9 Secondary reference L3 Technologies, Inc. Div L3 Keo |
NSN 5985-01-088-5419 is a Waveguide Assembly, manufactured by L3 Technologies, Inc. Div L3 Keo, classified under FSC 5985, Antennas, Waveguides, and Related Equipment. Status: active.
NSN 5985-01-088-5419 has 3 manufacturer part numbers on file: 934F055988 (Microtech Inc Dba Microtech Inc), 055988 (L3 Technologies, Inc. Div L3 Keo), 934F055988 (Microwave Engineering Corporation).
Key specifications for 055988: FSC Application Data: ANTENNAS,WAVEGUIDES,AND RELATED EQUIPMENT; Tubing Wall Construction Style: SEAMLESS ALL TUBING SEGMENTSEAMLESS ALL TUBING SEGMENT; Flange Inside Height: 0.396 INCHES MINIMUM AND 0.396 INCHES MINIMUM AND 0.404 INCHES MAXIMUM FIRST FLANGE0.404 INCHES MAXIMUM FIRST FLANGE IN; Flange Inside Height: 0.503 INCHES MINIMUM AND 0.503 INCHES MINIMUM AND 0.506 INCHES MAXIMUM SECOND FLANGE0.506 INCHES MAXIMUM SECOND FLANGE IN. 29 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 5985-01-088-5419 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.