PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

257BMonitor,phase

Time Mark Corp · NSN 6625-01-457-7358 · FSC 6625 · No Item Name Available
Verified by PartsTable
NSN 6625-01-457-7358 — this item is cataloged by the U.S. Government under National Stock Number 6625-01-457-7358. Primary manufacturer part number: 257B.
Features
  • Monitor,phase — FSC 6625
  • AC Voltage Rating: 240.0 VOLTS NOMINAL
  • Design Type: VISUAL
  • Indicator Type: LIGHT
  • Mounting Method: HOLE
  • Input Signal Frequency Rating: 60.0 HERTZ
  • Material: PLASTIC CASE
  • Frequency Rating: 60.0 HERTZ NOMINAL
Applications
  • Applications requiring Plastic Case construction
General Description

The Monitor,phase, cataloged under National Stock Number 6625-01-457-7358, is classified within Federal Supply Class 6625 (No Item Name Available) of the Instruments and Laboratory Equipment group. The primary manufacturer of record is Time Mark Corp. Government technical data includes 14 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. 7 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active. Unit of issue: EA.

Technical Specifications
ParameterValue
NSN6625-01-457-7358
Primary Part Number257B
Item NameMonitor,phase
FSC / FSG6625 / 66 — No Item Name Available
ManufacturerTime Mark Corp
StatusACTIVE
AC Voltage Rating240.0 VOLTS NOMINAL
Design TypeVISUAL
Indicator TypeLIGHT
Mounting MethodHOLE
Input Signal Frequency Rating60.0 HERTZ
MaterialPLASTIC CASE
Frequency Rating60.0 HERTZ NOMINAL
AC Voltage Rating240.0 VOLTS NOMINAL
Design TypeVISUAL
Indicator TypeLIGHT
Mounting MethodHOLE
Input Signal Frequency Rating60.0 HERTZ
MaterialPLASTIC CASE
Frequency Rating60.0 HERTZ NOMINAL
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Shelf Life Code0
Unit of IssueEA
SMR CodeJ
Verified Substitutes 7
4310-00-173-5268257B INTERCHANGEABLE
Ring,piston
Curtiss-Wright Electro-Mechanical Corp Dba Steam & Air Solutions Div Curtiss-Wright Steam and Air Solutions
5945-00-247-83648193581 INTERCHANGEABLE
Relay,electromagnetic
Us Army Aviation and Missile Command
5940-00-269-2219257103 INTERCHANGEABLE
Post,binding,electrical
Halsit Holdings Llc Div Halsit Holdings, Llc Dba Abbatron
2810-00-979-7520257B INTERCHANGEABLE
Plug,vacuum Pump Dr
Textron Lycoming Inc Williamsport Plant
5342-01-163-0784601 INTERCHANGEABLE
Bracket,quick Release
Ingersoll-Rand Co Material Handling Div
4820-01-372-8101257B-14S INTERCHANGEABLE
Valve,expansion
Superior Valve Co
5210-01-480-2078 INTERCHANGEABLE
Gage,surface
Cross-Reference Index
Part NumberManufacturer
257B PRIMARY Time Mark Corp (USA)
Related Parts
4310-00-173-5268INTERCHANGEABLE
RING,PISTON
257B
5945-00-247-8364INTERCHANGEABLE
RELAY,ELECTROMAGNETIC
8193581
5940-00-269-2219INTERCHANGEABLE
POST,BINDING,ELECTRICAL
257103
2810-00-979-7520INTERCHANGEABLE
PLUG,VACUUM PUMP DR
257B
5342-01-163-0784INTERCHANGEABLE
BRACKET,QUICK RELEASE
601
4820-01-372-8101INTERCHANGEABLE
VALVE,EXPANSION
257B-14S
5210-01-480-2078INTERCHANGEABLE
GAGE,SURFACE

Frequently Asked Questions

What is NSN 6625-01-457-7358?

NSN 6625-01-457-7358 is a Monitor,phase, manufactured by Time Mark Corp, classified under FSC 6625 (No Item Name Available). Status: active.

What are the part numbers for NSN 6625-01-457-7358?

NSN 6625-01-457-7358 has 1 cross-referenced part number: 257B (Time Mark Corp).

What NSN replaces 6625-01-457-7358?

There are 7 known substitutes for 6625-01-457-7358: 4310-00-173-5268, 5945-00-247-8364, 5940-00-269-2219 and 4 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 257B?

Key specifications for 257B: AC Voltage Rating: 240.0 VOLTS NOMINAL; Overall Height: 1.750 INCHES NOMINAL IN; Overall Width: 2.375 INCHES NOMINAL IN; Design Type: VISUAL. 20 total characteristics are documented in the Federal Logistics Information System.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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