The Compensator,liquid Quantity Gage, cataloged under National Stock Number 6680-01-620-4229, 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 Parker-Hannifin Corporation Dba Pneutronics Div Fluid Systems Division. The record lists 2 manufacturer part numbers 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 6680-01-620-4229 |
| Primary Part Number | 021-135-106 |
| Item Name | Compensator,liquid Quantity Gage |
| FSC / FSG | 6680 / 66 — Liquid and Gas Flow, Liquid Level, and Mechanical Motion Measuring Instruments |
| Manufacturer | Parker-Hannifin Corporation Dba Pneutronics Div Fluid Systems Division |
| Status | ACTIVE |
| 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 |
|---|---|
| 021-135-106 PRIMARY | Parker-Hannifin Corporation Dba Pneutronics Div Fluid Systems Division (USA) |
| FG150J6-FAC | Firstmark Aerospace Corp (USA) |
| Reference | Meaning |
|---|---|
| 021-135-106 | 5/1 Secondary reference Parker-Hannifin Corporation Dba Service and Support Operation Div Services and Support Operations |
| 201236986 | D/9 Drawing number reference only U.S. Government activity |
| 201236986-21 | 1/2 Source control — Government-approved source U.S. Government activity |
NSN 6680-01-620-4229 is a Compensator,liquid Quantity Gage, manufactured by Parker-Hannifin Corporation Dba Pneutronics Div Fluid Systems Division, classified under FSC 6680, Liquid and Gas Flow, Liquid Level, and Mechanical Motion Measuring Instruments. Status: active.
NSN 6680-01-620-4229 has 2 manufacturer part numbers on file: 021-135-106 (Parker-Hannifin Corporation Dba Pneutronics Div Fluid Systems Division), FG150J6-FAC (Firstmark Aerospace Corp).
Key specifications for 021-135-106: Part Name Assigned by Controlling Agency: LIQUID QTY GAGE TANK UNIT/COMP; End Item Identification: KC-135 ACFT. 0 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.