Thermowell6685-01-421-6656

NSN 6685-01-421-6656 · NIIN 014216656 · Part number 0341-005-0051

Weed Instrument Company, Inc. Dba Ultra Energy Div Ultra Energy · FSC 6685 — Pressure, Temperature, and Humidity Measuring and Controlling Instruments · FSG 66 — Instruments and Laboratory Equipment · CAGE 33969

Government record, cited

NSN 6685-01-421-6656 — this item is cataloged by the U.S. Government under National Stock Number 6685-01-421-6656. Manufacturer of record part number: 0341-005-0051.

Also searched as 6685-01-421-6656 · 6685014216656 · NIIN 014216656 · 01-421-6656 · FSC 6685 Pressure, Temperature, and Humidity Measuring and Controlling Instruments · CAGE 33969 · 0341-005-0051

Nearby stock numbers ← 6685-01-421-6644 Indicator, Temperature, Thermocoup · 6685-01-421-6844 Dampener, Fluid Pressure →

Features

Thermowell — FSC 6685
Style Designator: THREADED STRAIGHT SHANK
Bulb Tip Outside Diameter: 12.7 MILLIMETERS NOMINAL MM
External Thread Size: 1-5/16-12UN-3A1-5/16-12UN-3A A
Bulb Tip Length: 50.8 MILLIMETERS NOMINAL MM
Straight Bore Depth: 88.9 MILLIMETERS NOMINAL ALL BORES MM
Material: NICKEL ALLOY
Bore Inside Diameter: 6.5 MILLIMETERS MINIMUM AND 6.7 MILLIMETERS MAXIMUM ALL BORES MM

Identification

NSN: 6685-01-421-6656
NIIN: 014216656
FSC: 6685 — Pressure, Temperature, and Humidity Measuring and Controlling Instruments
FSG: 66 — Instruments and Laboratory Equipment
Primary part number: 0341-005-0051
Manufacturer: Weed Instrument Company, Inc. Dba Ultra Energy Div Ultra Energy

General Description

The Thermowell, cataloged under National Stock Number 6685-01-421-6656, 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 Weed Instrument Company, Inc. Dba Ultra Energy Div Ultra Energy. Government technical data includes 7 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. Current acquisition status: Active.

Technical Specifications

Parameter	Value
NSN	6685-01-421-6656
Primary Part Number	0341-005-0051
Item Name	Thermowell
FSC / FSG	6685 / 66 — Pressure, Temperature, and Humidity Measuring and Controlling Instruments
Manufacturer	Weed Instrument Company, Inc. Dba Ultra Energy Div Ultra Energy
Status	ACTIVE
Style Designator	THREADED STRAIGHT SHANK
Bulb Tip Outside Diameter	12.7 MILLIMETERS NOMINAL MM
External Thread Size	1-5/16-12UN-3A1-5/16-12UN-3A A
Bulb Tip Length	50.8 MILLIMETERS NOMINAL MM
Straight Bore Depth	88.9 MILLIMETERS NOMINAL ALL BORES MM
Material	NICKEL ALLOY
Bore Inside Diameter	6.5 MILLIMETERS MINIMUM AND 6.7 MILLIMETERS MAXIMUM ALL BORES MM

Lifecycle & Compliance

Acquisition Status	ACTIVE
DEMIL Code	DEMIL A — No Demilitarization Required
Hazard	Possible hazard — SDS may be required (DLA HMIC P)
Criticality Code	X

Cross-Reference Index

Part Number	Manufacturer
0341-005-0051 PRIMARY	Weed Instrument Company, Inc. Dba Ultra Energy Div Ultra Energy (USA)

No interchangeability data on file.

Other items in FSC 6685 — Pressure, Temperature, and Humidity Measuring and Controlling Instruments

Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.

6685-00-001-1475

6685-00-001-1475 · Item name not on file

6685-00-001-1503

CONTROL,TOTALIZER

6685-00-001-1643

6685-00-001-1643 · Item name not on file

6685-00-001-1711

GAGE,PRESSURE,DIAL INDICATING

6685-00-001-2099

6685-00-001-2099 · Item name not on file

6685-00-001-2100

6685-00-001-2100 · Item name not on file

6685-00-001-2101

6685-00-001-2101 · Item name not on file

6685-00-001-2102

6685-00-001-2102 · Item name not on file

Frequently Asked Questions

What is NSN 6685-01-421-6656?

NSN 6685-01-421-6656 is a Thermowell, manufactured by Weed Instrument Company, Inc. Dba Ultra Energy Div Ultra Energy, classified under FSC 6685, Pressure, Temperature, and Humidity Measuring and Controlling Instruments. Status: active.

What part numbers are listed for NSN 6685-01-421-6656?

NSN 6685-01-421-6656 has 1 manufacturer part number on file: 0341-005-0051 (Weed Instrument Company, Inc. Dba Ultra Energy Div Ultra Energy).

What are the specifications of 0341-005-0051?

Key specifications for 0341-005-0051: Style Designator: THREADED STRAIGHT SHANK; Overall Length: 95.2 MILLIMETERS NOMINAL95.2 MILLIMETERS NOMINAL MM; Bulb Tip Outside Diameter: 12.7 MILLIMETERS NOMINAL MM; External Thread Size: 1-5/16-12UN-3A1-5/16-12UN-3A A. 7 specifications are documented in the U.S. Government catalog.

Is NSN 6685-01-421-6656 hazardous material?

Possible hazard — SDS may be required (DLA HMIC P). Hazard information on this page is shown exactly as it appears in the DLA record.

Sources

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.

✓ Data cited from the U.S. Government catalog; commercial cross-references from OEM and certified industry sources.

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