The Thermometer,indicating,capillary, cataloged under National Stock Number 6685-01-307-4879, 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 Weiss Instruments, Inc.. Government technical data includes 22 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 6685-01-307-4879 |
| Primary Part Number | 25BU8-4211-20-220F-10FT |
| Item Name | Thermometer,indicating,capillary |
| FSC / FSG | 6685 / 66 — Pressure, Temperature, and Humidity Measuring and Controlling Instruments |
| Manufacturer | Weiss Instruments, Inc. |
| Status | ACTIVE |
| Flexible Tube Length | 120.000 INCHES NOMINAL IN |
| Mounting Facility Type and Quantity | 1 U-CLAMP |
| Bulb Type | PLAIN RIGID |
| Active Portion Diameter | 0.440 INCHES NOMINAL IN |
| Scale Inscription/background Color | BLACK MARKING ON WHITE BACKGROUND |
| Scale Accuracy Rating | PORM 1 SCALE DIVISION |
| Indicator Connection Method | FLEXIBLE TUBE |
| Reference Data and Literature | SPEC CONTROL DWG 115-8183 |
| Style Designator | BULB W/O SOCKET |
| Case Diameter | 2.781 INCHES MINIMUM AND 2.830 INCHES MAXIMUM IN |
| Actuating Medium | VAPOR |
| Pointer/pen Type and Quantity | 1 INDICATING SINGLE |
| Active Portion Length | 3.500 INCHES MAXIMUM IN |
| Features Provided | PROTECTIVE GLASS/PLASTIC |
| Scale Type | DIAL |
| Case Type | VIBRATION PROOF AND SHOCK RESISTANT AND HERMETICALLY SEALED |
| Scale Measurement Range | +20.000 TO 220.000 DEG FAHRENHEIT |
| Bulb Quantity | 1 |
| Bulb Tip Length | 3.500 INCHES MAXIMUM IN |
| Bulb Style | PLAIN BULB |
| Material | STEEL CORROSION RESISTING METER CASE |
| Material | COPPER BULB |
| 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 |
|---|---|
| 25BU8-4211-20-220F-10FT | Weiss Instruments, Inc. (USA) |
| Reference | Meaning |
|---|---|
| 115-8183 | D/9 Drawing number reference only Libby Power Systems, Llc |
| V25658018-120 | 3/9 Design control — primary reference Miljoco Corporation |
| 212A-JORF-LBFX | 5/9 Secondary reference Weksler Glass Thermometer Corp |
NSN 6685-01-307-4879 is a Thermometer,indicating,capillary, manufactured by Weiss Instruments, Inc., classified under FSC 6685, Pressure, Temperature, and Humidity Measuring and Controlling Instruments. Status: active.
NSN 6685-01-307-4879 has 1 manufacturer part number on file: 25BU8-4211-20-220F-10FT (Weiss Instruments, Inc.).
Key specifications for 25BU8-4211-20-220F-10FT: Flexible Tube Length: 120.000 INCHES NOMINAL IN; Mounting Facility Type and Quantity: 1 U-CLAMP; Bulb Type: PLAIN RIGID; Active Portion Diameter: 0.440 INCHES NOMINAL IN. 22 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.