The Indicator,electrical Tachometer, cataloged under National Stock Number 6620-00-179-2012, is classified within Federal Supply Class 6620 (Engine Instruments) of the Instruments and Laboratory Equipment group. Government technical data includes 13 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 4 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 6620-00-179-2012 |
| Item Name | Indicator,electrical Tachometer |
| FSC / FSG | 6620 / 66 — Engine Instruments |
| Status | ACTIVE |
| Individual Marking | PERCENT RPM |
| Mounting Facility Type and Quantity | 1 CLAMP |
| Contact Type | PIN |
| Length | 4.625 INCHES NOMINAL IN |
| Current Type | AC |
| Electrical Connection Quantity | 1 |
| Electrical Connection Identifying Number | MS33678-14S5P |
| Supplementary Features | TECH ORDER 5E6-2-33-4 |
| Scale Range | +0.1 TO 110.0 PERCENT REVOLUTIONS PER MINUTE SINGLE INDICATOR ALL SCALES |
| Diameter | 2.000 INCHES NOMINAL IN |
| Contact Quantity | 5 |
| Pointer Type | INDICATING ALL POINTERS |
| Presentation Type | DIAL |
| 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 |
| Reference | Meaning |
|---|---|
| MIL-I-27202 | 4/1 Identification reference U.S. Government activity |
| 8DJ81LZA2 | 3/2 Design control — primary reference U.S. Government activity |
NSN 6620-00-179-2012 is a Indicator,electrical Tachometer, classified under FSC 6620, Engine Instruments. Status: active.
4 possible matches (shared part number, not a government interchangeability claim): 6620-00-311-0549, 6620-00-684-1952, 6620-00-994-9159. Verify interchangeability with system specifications before substitution.
Key specifications for 6620-00-179-2012: Individual Marking: PERCENT RPM; Mounting Facility Type and Quantity: 1 CLAMP; Contact Type: PIN; Length: 4.625 INCHES NOMINAL IN. 13 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.
NSN 6620-00-179-2012 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.