The Adapter,speedometer-Tachometer D, cataloged under National Stock Number 6680-00-920-1182, is classified within Federal Supply Class 6680 (Liquid and Gas Flow, Liquid Level, and Mechanical Motion Measuring Instruments) of the Instruments and Laboratory Equipment group. The manufacturer of record is Brinkley Technology Group Llc Dba Hercules Manufacturing. Government technical data includes 1 specification, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 5 items share a part number with this NSN in the catalog (possible match — not a government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 | 6680-00-920-1182 |
| Primary Part Number | 255770A |
| Item Name | Adapter,speedometer-Tachometer D |
| FSC / FSG | 6680 / 66 — Liquid and Gas Flow, Liquid Level, and Mechanical Motion Measuring Instruments |
| Manufacturer | Brinkley Technology Group Llc Dba Hercules Manufacturing |
| Status | ACTIVE |
| Material | IRON |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 255770A PRIMARY | Brinkley Technology Group Llc Dba Hercules Manufacturing (USA) |
| Reference | Meaning |
|---|---|
| 255770A | 5/9 Secondary reference Hercules Engine Co Inc |
| 255770 | 5/9 Secondary reference Hercules Engine Co Inc |
| 255770 | 5/1 Secondary reference Brinkley Technology Group Llc Dba Hercules Manufacturing |
NSN 6680-00-920-1182 is a Adapter,speedometer-Tachometer D, manufactured by Brinkley Technology Group Llc Dba Hercules Manufacturing, classified under FSC 6680, Liquid and Gas Flow, Liquid Level, and Mechanical Motion Measuring Instruments. Status: active.
NSN 6680-00-920-1182 has 1 manufacturer part number on file: 255770A (Brinkley Technology Group Llc Dba Hercules Manufacturing).
5 possible matches (shared part number, not a government interchangeability claim): 4820-01-122-3508, 4820-01-125-4547, 4820-01-133-7858. Verify interchangeability with system specifications before substitution.
Key specifications for 255770A: Special Features: 2.500 IN. W;2.094 IN. LG;0.344 IN. DIA DRILLED HOLES;SHAFT HOLE THD 7/8-18 IN; Material: IRON. 1 specification is 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.