PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

1640-8Pyrometer,indicating

Alnor Instrument Company · NSN 6685-00-527-6814 · FSC 6685 · No Item Name Available
Verified by PartsTable
NSN 6685-00-527-6814 — this item is cataloged by the U.S. Government under National Stock Number 6685-00-527-6814. Primary manufacturer part number: 1640-8.
Features
  • Pyrometer,indicating — FSC 6685
  • Scale Measurement Range: +0.000 TO 800.000 DEG FAHRENHEIT
  • Scale Length: 2.625 INCHES NOMINAL IN
  • Scale Type: ECCENTRIC
  • Scale Calibration: CALIBRATED TO IRON CONSTANTAN THERMOCOUPLE
  • Scale Accuracy Rating: 1% ACCURACY
  • Pointer/pen Type and Quantity: 1 INDICATING SINGLE
  • Measurement Type: MILLIVOLT CIRCUIT
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Pyrometer,indicating, cataloged under National Stock Number 6685-00-527-6814, is classified within Federal Supply Class 6685 (No Item Name Available) of the Instruments and Laboratory Equipment group. The primary manufacturer of record is Alnor Instrument Company. Government technical data includes 8 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 1 commercial cross-reference from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 11 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN6685-00-527-6814
Primary Part Number1640-8
Item NamePyrometer,indicating
FSC / FSG6685 / 66 — No Item Name Available
ManufacturerAlnor Instrument Company
StatusACTIVE
Scale Measurement Range+0.000 TO 800.000 DEG FAHRENHEIT
Scale Length2.625 INCHES NOMINAL IN
Scale TypeECCENTRIC
Scale CalibrationCALIBRATED TO IRON CONSTANTAN THERMOCOUPLE
Scale Accuracy Rating1% ACCURACY
Pointer/pen Type and Quantity1 INDICATING SINGLE
Measurement TypeMILLIVOLT CIRCUIT
Scale Smallest Increment20.0 DEG FAHRENHEIT
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 11
5330-00-078-2533K16-408 INTERCHANGEABLE
Gasket
Rix Industries
5935-00-081-338216408-1 INTERCHANGEABLE
Connector,plug,electrical
Itt Cannon Llc
5310-00-515-8058 INTERCHANGEABLE
Washer,flat
5961-00-644-022416408 INTERCHANGEABLE
Semiconductor Device,photo
Bosch Security Systems, Llc
2805-00-758-0013 INTERCHANGEABLE
Crankshaft,engine
5950-00-920-1174200-16408-02 INTERCHANGEABLE
Transformer,power Autotransforme
Oeco, Llc Dba Pacific Scientific Oeco Div Fire Safety and Power Systems
5305-00-941-3545MS35275-209 INTERCHANGEABLE
Screw,machine
National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use
4520-01-203-5303 INTERCHANGEABLE
Heating Element,electrical,nonim
4810-01-286-976516408 INTERCHANGEABLE
Actuator,hydraulic-Pneumatic,lin
Tyco Fire Products Lp
5365-01-417-455616408 INTERCHANGEABLE
Shim
Aerosonic Llc
Cross-Reference Index
Part NumberManufacturer
1640-8 PRIMARY Alnor Instrument Company (USA)
Related Parts
5330-00-078-2533INTERCHANGEABLE
GASKET
K16-408
5935-00-081-3382INTERCHANGEABLE
CONNECTOR,PLUG,ELECTRICAL
16408-1
5310-00-515-8058INTERCHANGEABLE
WASHER,FLAT
5961-00-644-0224INTERCHANGEABLE
SEMICONDUCTOR DEVICE,PHOTO
16408
2805-00-758-0013INTERCHANGEABLE
CRANKSHAFT,ENGINE
5950-00-920-1174INTERCHANGEABLE
TRANSFORMER,POWER AUTOTRANSFORME
200-16408-02
5305-00-941-3545INTERCHANGEABLE
SCREW,MACHINE
MS35275-209
4520-01-203-5303INTERCHANGEABLE
HEATING ELEMENT,ELECTRICAL,NONIM
4810-01-286-9765INTERCHANGEABLE
ACTUATOR,HYDRAULIC-PNEUMATIC,LIN
16408
5365-01-417-4556INTERCHANGEABLE
SHIM
16408
6515-01-589-5275INTERCHANGEABLE
SCREW,BONE
212.207

Frequently Asked Questions

What is NSN 6685-00-527-6814?

NSN 6685-00-527-6814 is a Pyrometer,indicating, manufactured by Alnor Instrument Company, classified under FSC 6685 (No Item Name Available). Status: active.

What are the part numbers for NSN 6685-00-527-6814?

NSN 6685-00-527-6814 has 1 cross-referenced part number: 1640-8 (Alnor Instrument Company).

What NSN replaces 6685-00-527-6814?

There are 11 known substitutes for 6685-00-527-6814: 5330-00-078-2533, 5935-00-081-3382, 5310-00-515-8058 and 8 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 1640-8?

Key specifications for 1640-8: Scale Measurement Range: +0.000 TO 800.000 DEG FAHRENHEIT; Scale Length: 2.625 INCHES NOMINAL IN; Scale Type: ECCENTRIC; Scale Calibration: CALIBRATED TO IRON CONSTANTAN THERMOCOUPLE. 8 total characteristics are documented in the Federal Logistics Information System.

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