The Shaft Crescent, cataloged under National Stock Number 5999-01-103-9501, is classified within Federal Supply Class 5999 (Miscellaneous Electrical and Electronic Components) of the Electrical and Electronic Equipment Components group. The manufacturer of record is Andrea Systems Llc. 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active. Unit of issue: EA.
| Item Name | Shaft Crescent |
| FSC / FSG | 5999 — Miscellaneous Electrical and Electronic Components (FSG 59) |
| Manufacturers | Andrea Systems Llc (CAGE 3GET4) |
| Parameter | Value |
|---|---|
| NSN | 5999-01-103-9501 |
| Primary Part Number | C21-5005 |
| Item Name | Shaft Crescent |
| FSC / FSG | 5999 / 59 — Miscellaneous Electrical and Electronic Components |
| Manufacturer | Andrea Systems Llc |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Shelf Life Code | 0 |
| Unit of Issue | EA |
| Acquisition advice code | ZN |
| Weight | 0.0200 lbs |
| Cube | 0.0001 cu ft |
| Part Number | Manufacturer |
|---|---|
| C21-5005 PRIMARY | Andrea Systems Llc (USA) |
| Reference | Meaning |
|---|---|
| C21-5005 | 3/9 Design control — primary reference Andrea Electronics Corporation |
| 824-232 | 5/9 Secondary reference Andrea Electronics Corporation |
NSN 5999-01-103-9501 is a Shaft Crescent, manufactured by Andrea Systems Llc, classified under FSC 5999, Miscellaneous Electrical and Electronic Components. Status: active.
NSN 5999-01-103-9501 has 1 manufacturer part number on file: C21-5005 (Andrea Systems Llc).
1 possible match (shared part number, not a government interchangeability claim): 5210-01-656-4143. Verify interchangeability with system specifications before substitution.
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.