The Thermometer,self-Indicating,bime, cataloged under National Stock Number 6685-01-686-1731, 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 Enfm-Usa Inc. Government technical data includes 9 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 6685-01-686-1731 |
| Primary Part Number | B3A4-II 0/250FC |
| Item Name | Thermometer,self-Indicating,bime |
| FSC / FSG | 6685 / 66 — Pressure, Temperature, and Humidity Measuring and Controlling Instruments |
| Manufacturer | Enfm-Usa Inc |
| Status | ACTIVE |
| Mounting Facility Type and Quantity | 1 THREADED HOLE(S) |
| Scale Accuracy Rating | 1 PERCENT FULL SCALE PER GRADE A |
| Dial Diameter | 3.27 INCHES NOMINAL IN |
| Style Designator | ADJUSTABLE ANGLE |
| Mounting Facility Screw Thread Series Designator | NPT |
| Scale Type | CIRCULAR |
| Mounting Facility Nominal Screw Thread Diameter | 1.500 INCHES IN |
| Material | STEEL COMP 316 OVERALL |
| Scale Adjustment Variation | 10 DEGREE |
| 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 |
|---|---|
| B3A4-II 0/250FC PRIMARY | Enfm-Usa Inc (USA) |
| B3A4-II 0/250FC | Engineered Specialty Products, Inc. (USA) |
NSN 6685-01-686-1731 is a Thermometer,self-Indicating,bime, manufactured by Enfm-Usa Inc, classified under FSC 6685, Pressure, Temperature, and Humidity Measuring and Controlling Instruments. Status: active.
NSN 6685-01-686-1731 has 2 manufacturer part numbers on file: B3A4-II 0/250FC (Enfm-Usa Inc), B3A4-II 0/250FC (Engineered Specialty Products, Inc.).
Key specifications for B3A4-II 0/250FC: Mounting Facility Type and Quantity: 1 THREADED HOLE(S); Scale Accuracy Rating: 1 PERCENT FULL SCALE PER GRADE A; Dial Diameter: 3.27 INCHES NOMINAL IN; Style Designator: ADJUSTABLE ANGLE. 9 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.