The Indicator,electrical Tachometer, cataloged under National Stock Number 6620-01-152-4099, is classified within Federal Supply Class 6620 (Engine Instruments) of the Instruments and Laboratory Equipment group. The manufacturer of record is Jewell Instruments Llc. The record lists 4 manufacturer part numbers 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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.
| Item Name | Indicator,electrical Tachometer |
| FSC / FSG | 6620 — Engine Instruments (FSG 66) |
| Manufacturers | Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier (CAGE 30003); Essex Electro Engineers Inc (CAGE 21269); Mkc Electronics Inc Dba Mk Electronics Div Mkc Electronics Inc, Dba Mk Electronics (CAGE 0BZM1); Jewell Instruments Llc (CAGE 33005) |
| Parameter | Value |
|---|---|
| NSN | 6620-01-152-4099 |
| Primary Part Number | 363-137 |
| Item Name | Indicator,electrical Tachometer |
| FSC / FSG | 6620 / 66 — Engine Instruments |
| Manufacturer | Jewell Instruments Llc |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL Q — CCL Item — Commerce Control List |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 328AS172-1 | Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier (USA) |
| A624-2107 | Essex Electro Engineers Inc (USA) |
| MK 777-272 | Mkc Electronics Inc Dba Mk Electronics Div Mkc Electronics Inc, Dba Mk Electronics (USA) |
| 363-137 PRIMARY | Jewell Instruments Llc (USA) |
| Reference | Meaning |
|---|---|
| 268432 | 5/9 Secondary reference Solartron Electronics Inc Weston Instruments Div |
| 328AS172 | 7/2 Vendor item drawing reference Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier |
NSN 6620-01-152-4099 is a Indicator,electrical Tachometer, manufactured by Jewell Instruments Llc, classified under FSC 6620, Engine Instruments. Status: active.
NSN 6620-01-152-4099 has 4 manufacturer part numbers on file: 328AS172-1 (Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier), A624-2107 (Essex Electro Engineers Inc), MK 777-272 (Mkc Electronics Inc Dba Mk Electronics Div Mkc Electronics Inc, Dba Mk Electronics), 363-137 (Jewell Instruments Llc).
1 possible match (shared part number, not a government interchangeability claim): 5325-01-160-2237. Verify interchangeability with system specifications before substitution.
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
NSN 6620-01-152-4099 has DEMIL Code Q. 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.