The Gage,pressure,dial Indicating, cataloged under National Stock Number 6685-01-577-4550, is classified within Federal Supply Class 6685 (Pressure, Temperature, and Humidity Measuring and Controlling Instruments) of the Instruments and Laboratory Equipment group. The manufacturer of record is Tronair, Inc. Div Tronair. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 6685-01-577-4550 |
| Primary Part Number | K4276 |
| Item Name | Gage,pressure,dial Indicating |
| FSC / FSG | 6685 / 66 — Pressure, Temperature, and Humidity Measuring and Controlling Instruments |
| Manufacturer | Tronair, Inc. Div Tronair |
| Status | ACTIVE |
| Overall Diameter | 127.0 MILLIMETERS NOMINAL MM |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| K4276 PRIMARY | Tronair, Inc. Div Tronair (USA) |
| Reference | Meaning |
|---|---|
| H-1409 | 5/9 Secondary reference Tronair, Inc. Div Tronair |
NSN 6685-01-577-4550 is a Gage,pressure,dial Indicating, manufactured by Tronair, Inc. Div Tronair, classified under FSC 6685, Pressure, Temperature, and Humidity Measuring and Controlling Instruments. Status: active.
NSN 6685-01-577-4550 has 1 manufacturer part number on file: K4276 (Tronair, Inc. Div Tronair).
Key specifications for K4276: Overall Height: 119.4 MILLIMETERS NOMINAL MM; Overall Diameter: 127.0 MILLIMETERS NOMINAL MM; Overall Width: 83.5 MILLIMETERS NOMINAL MM; Special Features: NOTE: DO NOT USE WITH HYDROGEN GAS,TOXIC AND/OR EXPLOSIVE GAS MAY FORM DUE TO REACTION WITH RARE EARTH MAGNET;HOUSING: DIE CAST ALUMINUM WITH IMPREGNATED HARD COATING, STANDARD;OPTIONAL FORGED BRASS HOUSING IS REQUIRED FOR WATER OR WATER BASED FLUIDS;PR0CESS CONNECTIONS: 6.350 MM NPT FEMALE HIGH AND LOW PRESSURE TAPS,DUPLICATED-ONE PAIR TOP FOR AIR AND GAS,AND ONE PAIR BOTTOM FOR LIQUIDS MM. 1 specification is documented in the U.S. Government catalog.
Possible hazard — SDS may be required (DLA HMIC P). 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.