PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

4-626Pyrometer,indicating

Bristol Babcock Inc Instruments-Systems Div Sub of Babcock Intl Inc · NSN 6685-00-446-8973 · FSC 6685 · No Item Name Available
Verified by PartsTable
NSN 6685-00-446-8973 — this item is cataloged by the U.S. Government under National Stock Number 6685-00-446-8973. Primary manufacturer part number: 4-626.
Features
  • Pyrometer,indicating — FSC 6685
  • Unthreaded Mounting Hole Diameter: 0.281 INCHES NOMINAL IN
  • Material: STEEL METER CASE
  • Scale Measurement Range: +0.000 TO 1200.000 DEG FAHRENHEIT
  • Measurement Type: MILLIVOLT CIRCUIT
  • Case Type: DRIPPROOF
  • Scale Length: 4.500 INCHES NOMINAL IN
  • Scale Accuracy Rating: PORM 2 PCT OF SCALE
Applications
  • Applications requiring Steel Meter Case construction
General Description

The Pyrometer,indicating, cataloged under National Stock Number 6685-00-446-8973, is classified within Federal Supply Class 6685 (No Item Name Available) of the Instruments and Laboratory Equipment group. The primary manufacturer of record is Bristol Babcock Inc Instruments-Systems Div Sub of Babcock Intl Inc. Government technical data includes 10 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. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN6685-00-446-8973
Primary Part Number4-626
Item NamePyrometer,indicating
FSC / FSG6685 / 66 — No Item Name Available
ManufacturerBristol Babcock Inc Instruments-Systems Div Sub of Babcock Intl Inc
StatusCANCELLED
Unthreaded Mounting Hole Diameter0.281 INCHES NOMINAL IN
MaterialSTEEL METER CASE
Scale Measurement Range+0.000 TO 1200.000 DEG FAHRENHEIT
Measurement TypeMILLIVOLT CIRCUIT
Case TypeDRIPPROOF
Scale Length4.500 INCHES NOMINAL IN
Scale Accuracy RatingPORM 2 PCT OF SCALE
Scale Smallest Increment20.0 DEG FAHRENHEIT
Pointer/pen Type and Quantity24 INDICATING MULTIPLE
Scale CalibrationCALIBRATED FOR IRON-CONSTANTAN THERMOCOUPLE
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 12
5330-00-073-1110 INTERCHANGEABLE
Gasket
5950-00-645-438754B7243H03 INTERCHANGEABLE
Coil,radio Frequency
Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp
6110-00-833-77784626 INTERCHANGEABLE
Voltage Regulator Subassembly
Precision Electronics, Inc
6240-00-917-07714626 INTERCHANGEABLE
Lamp,incandescent
General Electric Company Dba Ge
5120-00-952-35075120-00-952-3507 INTERCHANGEABLE
Dispenser,sealant
General Services Administration Federal Supply Service
7490-00-955-3580 INTERCHANGEABLE
E-Ring
1680-01-015-5026 INTERCHANGEABLE
Bowl Assembly
4520-01-178-60194626 INTERCHANGEABLE
Heating Element,electrical,nonim
Bunn-O-Matic Corporation Div Government Sales
5120-01-335-9070 INTERCHANGEABLE
Socket,socket Wrench
3950-01-435-2798 INTERCHANGEABLE
Hoist,chain
Cross-Reference Index
Part NumberManufacturer
4-626 Bristol Babcock Inc Instruments-Systems Div Sub of Babcock Intl Inc (USA)
Related Parts
5330-00-073-1110INTERCHANGEABLE
GASKET
5950-00-645-4387INTERCHANGEABLE
COIL,RADIO FREQUENCY
54B7243H03
6110-00-833-7778INTERCHANGEABLE
VOLTAGE REGULATOR SUBASSEMBLY
4626
6240-00-917-0771INTERCHANGEABLE
LAMP,INCANDESCENT
4626
5120-00-952-3507INTERCHANGEABLE
DISPENSER,SEALANT
5120-00-952-3507
7490-00-955-3580INTERCHANGEABLE
E-RING
1680-01-015-5026INTERCHANGEABLE
BOWL ASSEMBLY
4520-01-178-6019INTERCHANGEABLE
HEATING ELEMENT,ELECTRICAL,NONIM
4626
5120-01-335-9070INTERCHANGEABLE
SOCKET,SOCKET WRENCH
3950-01-435-2798INTERCHANGEABLE
HOIST,CHAIN
8430-01-479-4047INTERCHANGEABLE
SHOES,MEN'S
8430-01-479-4050INTERCHANGEABLE
SHOES,MEN'S

Frequently Asked Questions

What is NSN 6685-00-446-8973?

NSN 6685-00-446-8973 is a Pyrometer,indicating, manufactured by Bristol Babcock Inc Instruments-Systems Div Sub of Babcock Intl Inc, classified under FSC 6685 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 6685-00-446-8973?

NSN 6685-00-446-8973 has 1 cross-referenced part number: 4-626 (Bristol Babcock Inc Instruments-Systems Div Sub of Babcock Intl Inc).

What NSN replaces 6685-00-446-8973?

There are 12 known substitutes for 6685-00-446-8973: 5330-00-073-1110, 5950-00-645-4387, 6110-00-833-7778 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 4-626?

Key specifications for 4-626: Unthreaded Mounting Hole Diameter: 0.281 INCHES NOMINAL IN; Material: STEEL METER CASE; Scale Measurement Range: +0.000 TO 1200.000 DEG FAHRENHEIT; Overall Length: 14.375 INCHES NOMINAL IN. 13 total characteristics are documented in the Federal Logistics Information System.

Is NSN 6685-00-446-8973 still in active supply?

NSN 6685-00-446-8973 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.
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