The Attenuator,fixed, cataloged under National Stock Number 5985-00-229-2929, 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 Us Army Aviation and Missile Command. Government technical data includes 20 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5985-00-229-2929 |
| Primary Part Number | 7913122-1-4 |
| Item Name | Attenuator,fixed |
| FSC / FSG | 5985 / 59 — Antennas, Waveguides, and Related Equipment |
| Manufacturer | Us Army Aviation and Missile Command |
| Status | ACTIVE |
| Waveguide Flange Type | CONTACT |
| FSC Application Data | ANTENNAS,WAVEGUIDES,AND RELATED EQUIPMENT |
| Mounting Hole/stud Quantity | 8 |
| Frequency Range | 8.200 GIGAHERTZ MINIMUM AND 12.400 GIGAHERTZ MAXIMUM |
| Inside Width | 0.622 INCHES NOMINAL IN |
| Body Style | RECTANGULAR, TERMINAL/TERMINALS ON OPPOSITE SURFACES |
| Center to Center Distance Between Mounting Facilities Parallel to Length | 1.220 INCHES NOMINAL IN |
| Voltage Standing Wave Ratio | 1.15 |
| Waveguide Flange Designation | UG-39/U |
| Mounting Method | TERMINAL WITH MOUNTING HOLES |
| Rf Signal Attenuation in Decibels | 20.0 |
| Attenuation Accuracy in Decibels | -0.50 TO 0.50 |
| Unthreaded Mounting Hole Diameter | 0.1695 INCHES MINIMUM AND 0.1715 INCHES MAXIMUM IN |
| Center to Center Distance Between Mounting Facilities Parallel to Height | 1.280 INCHES NOMINAL IN |
| Specification/standard Data | 18876-7913122 MANUFACTURERS SPECIFICATION CONTROL |
| Waveguide Designation | RG-52/U |
| Voltage Standing Wave Ratio Frequency Range | +8.2 TO 12.4 GIGAHERTZ |
| Application Design | WAVEGUIDE |
| Inside Height | 0.310 INCHES NOMINAL IN |
| Terminal Type and Quantity | 2 FLANGE |
| 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 |
|---|---|
| 7913122-1-4 PRIMARY | Us Army Aviation and Missile Command (USA) |
| X175A-20DB | Microlab/fxr Llc (USA) |
NSN 5985-00-229-2929 is a Attenuator,fixed, manufactured by Us Army Aviation and Missile Command, classified under FSC 5985, Antennas, Waveguides, and Related Equipment. Status: active.
NSN 5985-00-229-2929 has 2 manufacturer part numbers on file: 7913122-1-4 (Us Army Aviation and Missile Command), X175A-20DB (Microlab/fxr Llc).
Key specifications for 7913122-1-4: Waveguide Flange Type: CONTACT; Overall Height: 1.610 INCHES MINIMUM AND 1.640 INCHES MAXIMUM IN; FSC Application Data: ANTENNAS,WAVEGUIDES,AND RELATED EQUIPMENT; Mounting Hole/stud Quantity: 8. 20 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 5985-00-229-2929 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.