The Attenuator,fixed, cataloged under National Stock Number 5985-00-683-5318, 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 Hewlett-Packard Company Dba HP. Government technical data includes 18 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5985-00-683-5318 |
| Primary Part Number | X370D |
| Item Name | Attenuator,fixed |
| FSC / FSG | 5985 / 59 — Antennas, Waveguides, and Related Equipment |
| Manufacturer | Hewlett-Packard Company Dba HP |
| Status | ACTIVE |
| Waveguide Flange Type | COVER |
| Mounting Hole/stud Quantity | 4 |
| Frequency Range | 0.000 HERTZ MINIMUM AND 10.000 KILOHERTZ MAXIMUM |
| Inside Width | 1.000 INCHES NOMINAL IN |
| Body Style | RECTANGULAR, TERMINAL/TERMINALS ON OPPOSITE SURFACES |
| Waveguide Flange Designation | UG-39/U |
| Mounting Method | TERMINAL WITH MOUNTING HOLES |
| Rf Signal Attenuation in Decibels | 20.0 |
| Attenuation Accuracy in Decibels | -0.04 TO 0.04 |
| Unthreaded Mounting Hole Diameter | 0.156 INCHES NOMINAL IN |
| Center to Center Distance Between Mounting Facilities Parallel to Height | 1.250 INCHES NOMINAL IN |
| Surface Treatment | ENAMEL AND ANODIZE BODY |
| Center to Center Distance Between Mounting Facilities Parallel to Width | 1.250 INCHES NOMINAL IN |
| Application Design | WAVEGUIDE |
| Material | ALUMINUM BODY |
| Inside Height | 0.500 INCHES NOMINAL IN |
| Power Rating | 1.0 WATTS AVERAGE |
| Terminal Type and Quantity | 2 FLANGE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| X370D PRIMARY | Hewlett-Packard Company Dba HP (USA) |
| Reference | Meaning |
|---|---|
| X-219-20-5.25-A | 5/9 Secondary reference 3dbm Co Inc |
| X-219-20-5.5-A | 5/9 Secondary reference 3dbm Co Inc |
NSN 5985-00-683-5318 is a Attenuator,fixed, manufactured by Hewlett-Packard Company Dba HP, classified under FSC 5985, Antennas, Waveguides, and Related Equipment. Status: active.
NSN 5985-00-683-5318 has 1 manufacturer part number on file: X370D (Hewlett-Packard Company Dba HP).
Key specifications for X370D: Waveguide Flange Type: COVER; Overall Height: 1.625 INCHES NOMINAL IN; Mounting Hole/stud Quantity: 4; Frequency Range: 0.000 HERTZ MINIMUM AND 10.000 KILOHERTZ MAXIMUM. 18 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.