The Gage,pressure,dial Indicating, cataloged under National Stock Number 6685-00-482-8419, 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 Bristol Babcock Inc Helicoid Instruments Div. Government technical data includes 17 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 4 items share a part number with this NSN in the catalog (possible match — not a government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 | 6685-00-482-8419 |
| Primary Part Number | HD405 |
| Item Name | Gage,pressure,dial Indicating |
| FSC / FSG | 6685 / 66 — Pressure, Temperature, and Humidity Measuring and Controlling Instruments |
| Manufacturer | Bristol Babcock Inc Helicoid Instruments Div |
| Status | ACTIVE |
| FSC Application Data | GAGE,PRESSURE,DIAL INDICATING,EXCEPT ENGINE |
| Scale Accuracy | 1/2 OF 1 PERCENT OF FULL SCALE |
| Scale Name | PRESSURE |
| Overall Diameter | 4.125 INCHES NOMINAL IN |
| Mounting Method | BRACKET(S) AND STUD(S) |
| Scale Inscription/background Color | WHITE BACKGROUND WITHOUT NUMBERS,SHADED GREEN BANDS AND RED LINES FROM CENTER TO OUTER EDGE,SHADED GREEN WITH MARK 5 PRINTED IN AREA FROM 415 TO 495 PS1G,SHADED GREEN WITH MARK 4 PRINTED IN AREA FROM 735 TO 865 PSIG,SINGLE RED MARK AT 950 PSI,SINGLE BLACK MARK AT 100 PSI ON OUTER EDGE,SINGLE BLACK MARK AT 1000 PSI ON OUTER EDGE,SINGLE BLACK MARK AT 500 PSI ON OUTER EDGE |
| Connection Type | EXTERNAL |
| Scale Range | +0.000 TO 1000.000 POUNDS PRESSURE PER SQUARE INCH LBS |
| Stud Location | BACK |
| Pointer Type | INDICATING |
| Scale Type | SINGLE |
| Connector Type Vent | NOT PROVIDED |
| Dial Size | 3-1/2 INCH DIAMETER IN |
| Connection Location | BACK |
| Material | ALUMINUM ALLOY CASE |
| Connection Quantity | 1 |
| Connection Size | 0.250 IN. NPTF DIA 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 |
|---|---|
| 2497172 | Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier (USA) |
| HD405 PRIMARY | Bristol Babcock Inc Helicoid Instruments Div (USA) |
| Reference | Meaning |
|---|---|
| 410L | 5/1 Secondary reference Bristol Babcock Inc Helicoid Instruments Div |
NSN 6685-00-482-8419 is a Gage,pressure,dial Indicating, manufactured by Bristol Babcock Inc Helicoid Instruments Div, classified under FSC 6685, Pressure, Temperature, and Humidity Measuring and Controlling Instruments. Status: active.
NSN 6685-00-482-8419 has 2 manufacturer part numbers on file: 2497172 (Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier), HD405 (Bristol Babcock Inc Helicoid Instruments Div).
4 possible matches (shared part number, not a government interchangeability claim): 6685-00-482-8431, 6730-01-570-1092, 6160-01-578-1321. Verify interchangeability with system specifications before substitution.
Key specifications for HD405: FSC Application Data: GAGE,PRESSURE,DIAL INDICATING,EXCEPT ENGINE; Scale Accuracy: 1/2 OF 1 PERCENT OF FULL SCALE; Scale Name: PRESSURE; Overall Diameter: 4.125 INCHES NOMINAL IN. 17 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.