The Base,mast, cataloged under National Stock Number 5985-00-221-5551, is classified within Federal Supply Class 5985 (Antennas, Waveguides, and Related Equipment) of the Electrical and Electronic Equipment Components group. Government technical data includes 11 specifications, cited from the U.S. Government catalog. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5985-00-221-5551 |
| Item Name | Base,mast |
| FSC / FSG | 5985 / 59 — Antennas, Waveguides, and Related Equipment |
| Status | ACTIVE |
| FSC Application Data | ANTENNA,RADIO,EXCEPT NAVIGATION,NONAIRBORNE |
| Mounting Facility Quantity | 6 |
| Mounting Facility Circle Radius | 3.875 INCHES NOMINAL IN |
| Mounting Method | UNTHREADED HOLE(S) |
| Mounting Hole Diameter | 0.438 INCHES NOMINAL IN |
| Angle Between Adjacent Mounting Facilities in Deg | 60.0 |
| Basic Shape Style | CYLINDRICAL W/FLARED END |
| Surface Treatment | ENAMEL |
| Special Markings | MP&76 |
| Material | STEEL |
| Mounting Hole Type | PLAIN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL B — Remove Demilitarization Key Points |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| SC-D-100580 | 5/9 Secondary reference Valcore Manufacturing Llc Dba Use CAGE Code 04ye2 for Cataloging |
| SC-D-100580 | 5/2 Secondary reference U.S. Government activity |
| SC-D-100580 | 5/9 Secondary reference Valcore Manufacturing Llc |
| SC-D-19873A | 3/2 Design control — primary reference U.S. Government activity |
NSN 5985-00-221-5551 is a Base,mast, classified under FSC 5985, Antennas, Waveguides, and Related Equipment. Status: active.
Key specifications for 5985-00-221-5551: FSC Application Data: ANTENNA,RADIO,EXCEPT NAVIGATION,NONAIRBORNE; Mounting Facility Quantity: 6; Mounting Facility Circle Radius: 3.875 INCHES NOMINAL IN; Mounting Method: UNTHREADED HOLE(S). 11 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 5985-00-221-5551 has DEMIL Code B. 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.