The Gage,pressure,dial Indicating, cataloged under National Stock Number 6685-01-520-9304, 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 24 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 6685-01-520-9304 |
| Primary Part Number | 101FTW20A21 |
| 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 |
| Mounting Hole Quantity | 3 |
| Scale Accuracy | 0.25 PCT FULL SCALE |
| Scale Name | POUNDS PRESSURE |
| Relationship to Similar Equipment | REPLACES BY 5VG90725-105 PER DWG |
| Overall Diameter | 6.000 INCHES NOMINAL IN |
| Actuation Type | SINGLE COIL HELICAL BOURDON TUBE |
| Mounting Method | FLUSH FLANGE |
| Scale Smallest Increment | 2.0 POUNDS PER SQUARE INCH (PSI) LBS |
| Reference Data and Literature | DWG5VG90725 AND COMMERCIAL DATA |
| Connection Type | EXTERNAL |
| Scale Range | +0.0 TO 5000.0 POUNDS PER SQUARE INCH LBS |
| Mounting Hole Diameter | 0.218 INCHES NOMINAL IN |
| Scale Name for Which Pointer Is Designed | LOW PRESSURE |
| Pointer Type | REFERENCE |
| Accessory Components and Quantity | KNIFE EDGE POINTER, MIRROR SCALE |
| Adjustability | ADJUSTABLE |
| Specification/standard Data | 81205-5VG90725 MANUFACTURERS SPECIFICATION CONTROL |
| Scale Type | CONCENTRIC DIAL |
| Dial Size | 4.5 INCH DIAMETER IN |
| Bolt Circle Diameter | 5.370 INCHES NOMINAL IN |
| Connection Location | BOTTOM |
| Material | CONSTANTAN IRON ACTUATING ELEMENT |
| Connection Quantity | 1 |
| Connection Size | 0.250 IN NPT IN |
| 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 |
|---|---|
| 101FTW20A21 PRIMARY | Perma-Cal Industries, Inc (USA) |
| Reference | Meaning |
|---|---|
| 5VG90725-107 | 7/2 Vendor item drawing reference U.S. Government activity |
NSN 6685-01-520-9304 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 6685-01-520-9304 has 1 manufacturer part number on file: 101FTW20A21 (Perma-Cal Industries, Inc).
Key specifications for 101FTW20A21: Mounting Hole Quantity: 3; Scale Accuracy: 0.25 PCT FULL SCALE; Scale Name: POUNDS PRESSURE; Relationship to Similar Equipment: REPLACES BY 5VG90725-105 PER DWG. 24 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.