PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

H261-11Tester,pyrometer and Thermocoupl

Howell Instruments, Inc. Dba Howell Instruments Inc · NSN 6685-01-147-9063 · FSC 6685 · No Item Name Available
Verified by PartsTable
NSN 6685-01-147-9063 — this item is cataloged by the U.S. Government under National Stock Number 6685-01-147-9063. Primary manufacturer part number: H261-11.
Features
  • Tester,pyrometer and Thermocoupl — FSC 6685
  • Scale Accuracy: +/- 0.02 DEG C. DEGC
  • Measurement Type: MILLIVOLT CIRCUIT
  • Accessory Components and Quantity: THERMOCOUPLES, TYPES K, T, J, MILLIVOLTS, SYNCCHRO, OHMS AND MEGOHMS
  • Scale Type: HORIZONTAL
  • Material: ALUMINUM CASE
  • Case Type: CARRYING CASE W/HANDLE
  • Installation Design: PORTABLE
Applications
  • Applications requiring Aluminum Case construction
General Description

The Tester,pyrometer and Thermocoupl, cataloged under National Stock Number 6685-01-147-9063, is classified within Federal Supply Class 6685 (No Item Name Available) of the Instruments and Laboratory Equipment group. The primary manufacturer of record is Howell Instruments, Inc. Dba Howell Instruments Inc. Government technical data includes 7 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 3 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 4 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN6685-01-147-9063
Primary Part NumberH261-11
Item NameTester,pyrometer and Thermocoupl
FSC / FSG6685 / 66 — No Item Name Available
ManufacturerHowell Instruments, Inc. Dba Howell Instruments Inc
StatusCANCELLED
Scale Accuracy+/- 0.02 DEG C. DEGC
Measurement TypeMILLIVOLT CIRCUIT
Accessory Components and QuantityTHERMOCOUPLES, TYPES K, T, J, MILLIVOLTS, SYNCCHRO, OHMS AND MEGOHMS
Scale TypeHORIZONTAL
MaterialALUMINUM CASE
Case TypeCARRYING CASE W/HANDLE
Installation DesignPORTABLE
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 4
5305-00-543-2273 INTERCHANGEABLE
Screw,cap,hexagon Head
6910-00-871-7365 INTERCHANGEABLE
Slide,terrain Map,
6620-00-891-2225 INTERCHANGEABLE
Indicator,pressure
5999-01-520-4954H26111 INTERCHANGEABLE
Magnet Speed Sensor
Meggitt (north Hollywood), Inc. Dba Meggitt Control Systems Div Meggitt Defense Systems, Inc.
Cross-Reference Index
Part NumberManufacturer
H261-11 PRIMARY Howell Instruments, Inc. Dba Howell Instruments Inc (USA)
H261-2 Howell Instruments, Inc. Dba Howell Instruments Inc (USA)
1817-02 Avien Inc
Related Parts
5305-00-543-2273INTERCHANGEABLE
SCREW,CAP,HEXAGON HEAD
6910-00-871-7365INTERCHANGEABLE
SLIDE,TERRAIN MAP,
6620-00-891-2225INTERCHANGEABLE
INDICATOR,PRESSURE
5999-01-520-4954INTERCHANGEABLE
MAGNET SPEED SENSOR
H26111

Frequently Asked Questions

What is NSN 6685-01-147-9063?

NSN 6685-01-147-9063 is a Tester,pyrometer and Thermocoupl, manufactured by Howell Instruments, Inc. Dba Howell Instruments Inc, classified under FSC 6685 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 6685-01-147-9063?

NSN 6685-01-147-9063 has 3 cross-referenced part numbers: H261-11 (Howell Instruments, Inc. Dba Howell Instruments Inc), H261-2 (Howell Instruments, Inc. Dba Howell Instruments Inc), 1817-02 (Avien Inc).

What NSN replaces 6685-01-147-9063?

There are 4 known substitutes for 6685-01-147-9063: 5305-00-543-2273, 6910-00-871-7365, 6620-00-891-2225 and 1 more. Verify interchangeability with system specifications before substitution.

What are the specifications of H261-11?

Key specifications for H261-11: Overall Length: 14.500 INCHES NOMINAL IN; Scale Accuracy: +/- 0.02 DEG C. DEGC; Measurement Type: MILLIVOLT CIRCUIT; Special Features: USED TO CALIBRATE THERMOCOUPLE SYSTEMS, INDICATORS, AND THERMOCOUPLES;POWERED BY 115 VAC, 60-400 HZ, NUL BALANCE DIAL DIGITAL DISPLAY;ZERO DRIFT CORRECTION FACTOR INCLUDED VAC. 11 total characteristics are documented in the Federal Logistics Information System.

Is NSN 6685-01-147-9063 still in active supply?

NSN 6685-01-147-9063 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com