The Indicator,electrical Tachometer, cataloged under National Stock Number 6620-00-581-5178, is classified within Federal Supply Class 6620 (Engine Instruments) of the Instruments and Laboratory Equipment group. Government technical data includes 9 specifications, cited from the U.S. Government catalog. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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.
| Parameter | Value |
|---|---|
| NSN | 6620-00-581-5178 |
| Item Name | Indicator,electrical Tachometer |
| FSC / FSG | 6620 / 66 — Engine Instruments |
| Status | ACTIVE |
| FSC Application Data | 1. ENGINE INSTRUMENT |
| Contact Type | PIN |
| Current Type | DC |
| Electrical Connection Quantity | 1 |
| Mounting Stud Diameter | 0.172 INCHES NOMINAL IN |
| Electrical Connection Identifying Number | PART NO. 3106-12S-3S |
| Accuracy Rating | 50.0 REVOLUTIONS PER MINUTE SINGLE INDICATOR SINGLE SCALE |
| Contact Quantity | 2 |
| Pointer Type | CLOCK-HAND SINGLE POINTER |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| 460058 | 5/9 Secondary reference Solartron Electronics Inc Weston Instruments Div |
| 545RD106P2 | 5/9 Secondary reference Solartron Electronics Inc Weston Instruments Div |
| CATN0460058 | 3/9 Design control — primary reference Solartron Electronics Inc Weston Instruments Div |
NSN 6620-00-581-5178 is a Indicator,electrical Tachometer, classified under FSC 6620, Engine Instruments. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 5305-01-571-8242. Verify interchangeability with system specifications before substitution.
Key specifications for 6620-00-581-5178: FSC Application Data: 1. ENGINE INSTRUMENT; Contact Type: PIN; Current Type: DC; Electrical Connection Quantity: 1. 9 specifications are documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). 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.