The Gage,pressure,dial Indicating, cataloged under National Stock Number 6685-01-539-6830, 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 Perma-Cal Industries, Inc. Government technical data includes 16 specifications, 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 6685-01-539-6830 |
| Primary Part Number | 121NTW00A23-CO |
| Item Name | Gage,pressure,dial Indicating |
| FSC / FSG | 6685 / 66 — Pressure, Temperature, and Humidity Measuring and Controlling Instruments |
| Manufacturer | Perma-Cal Industries, Inc |
| Status | ACTIVE |
| Scale Accuracy | P1-2 %FULL SCALE +1/-1% |
| Scale Name | PRESSURE |
| Overall Diameter | 4.500 INCHES NOMINAL IN |
| Mounting Connection Location | BOTTOM |
| Mounting Method | CONNECTION |
| Scale Smallest Increment | 1.0 POUNDS PER SQUARE INCH (PSI) LBS |
| Connection Type | EXTERNAL |
| Scale Range | +0.0 TO 15.0 POUNDS PER SQUARE INCH LBS |
| Scale Name for Which Pointer Is Designed | PRESSURE |
| Pointer Type | INDICATING |
| Adjustability | ADJUSTABLE |
| Scale Type | DIAL |
| Material | PLASTIC ACRYLIC PROTECTIVE CRYSTAL |
| Material | BRASS ACTUATING ELEMENT |
| Material | STEEL CORROSION RESISTING CASE |
| Connection Size | 1/2 NPTM |
| 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 |
|---|---|
| 121NTW00A23-CO PRIMARY | Perma-Cal Industries, Inc (USA) |
| Reference | Meaning |
|---|---|
| 25584-15C51-GBK-GCG-GCO | 3/9 Design control — primary reference 3d Instruments, Lp Dba Sierra Precision |
| 5VG90094-101 | 7/2 Vendor item drawing reference U.S. Government activity |
NSN 6685-01-539-6830 is a Gage,pressure,dial Indicating, manufactured by Perma-Cal Industries, Inc, classified under FSC 6685, Pressure, Temperature, and Humidity Measuring and Controlling Instruments. Status: active.
NSN 6685-01-539-6830 has 1 manufacturer part number on file: 121NTW00A23-CO (Perma-Cal Industries, Inc).
Key specifications for 121NTW00A23-CO: Scale Accuracy: P1-2 %FULL SCALE +1/-1%; Scale Name: PRESSURE; Overall Diameter: 4.500 INCHES NOMINAL IN; Mounting Connection Location: BOTTOM. 16 specifications are 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.