PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

12601Switch,flow

Thomas Products Llc · NSN 5930-01-251-4977 · FSC 5930 · No Item Name Available
Verified by PartsTable
NSN 5930-01-251-4977 — this item is cataloged by the U.S. Government under National Stock Number 5930-01-251-4977. Primary manufacturer part number: 12601.
Features
  • Switch,flow — FSC 5930
  • Body Length: 4.125 INCHES NOMINAL IN
  • Distance Between Mounting Facility Centers: 2.375 INCHES NOMINAL IN
  • Unthreaded Mounting Hole Diameter: 0.281 INCHES NOMINAL IN
  • Nonpile-Up Contact Arrangement: 1 POLE, DOUBLE THROW, ONE POSITION MOMENTARY
  • Contact Voltage Rating in Volts: 50.0 DC AT SEA LEVEL THIRD VOLTAGE
  • Contact Load Current Rating: 80.0 MILLIAMPERES RESISTIVE LOAD SECOND VOLTAGE
  • Contact Load Current Rating: 0.4 AMPERES RESISTIVE LOAD THIRD VOLTAGE
Applications
  • Circuit control and protection
  • Equipment power management
  • Signal routing
General Description

The Switch,flow, cataloged under National Stock Number 5930-01-251-4977, is classified within Federal Supply Class 5930 (No Item Name Available) of the Electrical and Electronic Equipment Components group. The primary manufacturer of record is Thomas Products Llc. Government technical data includes 23 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: Active.

Technical Specifications
ParameterValue
NSN5930-01-251-4977
Primary Part Number12601
Item NameSwitch,flow
FSC / FSG5930 / 59 — No Item Name Available
ManufacturerThomas Products Llc
StatusACTIVE
Body Length4.125 INCHES NOMINAL IN
Distance Between Mounting Facility Centers2.375 INCHES NOMINAL IN
Unthreaded Mounting Hole Diameter0.281 INCHES NOMINAL IN
Nonpile-Up Contact Arrangement1 POLE, DOUBLE THROW, ONE POSITION MOMENTARY
Contact Voltage Rating in Volts50.0 DC AT SEA LEVEL THIRD VOLTAGE
Contact Load Current Rating80.0 MILLIAMPERES RESISTIVE LOAD SECOND VOLTAGE
Contact Load Current Rating0.4 AMPERES RESISTIVE LOAD THIRD VOLTAGE
Mounting MethodBASE AND UNTHREADED HOLE(S)
Contact Action StimulusINCREASE
Contact Load Current Rating60.0 MILLIAMPERES RESISTIVE LOAD FOURTH VOLTAGE
Thread Series DesignatorNPT ALL THREADED HOLE
Nominal Thread Size0.250 INCHES ALL THREADED HOLE IN
Style DesignatorRECTANGULAR
Media for Which DesignedLIQUID
Contact Voltage Rating in Volts240.0 AC AT SEA LEVEL SECOND VOLTAGE
Mounting Facility PatternTWO POSITION IN-LINE
Contact Voltage Rating in Volts50.0 AC AT SEA LEVEL FIRST VOLTAGE
Terminal TypeWIRE LEAD
Contact Voltage Rating in Volts240.0 DC AT SEA LEVEL FOURTH VOLTAGE
Contact AdjustabilityACTUATION POINT NOT ADJUSTABLE
Contact Stimulus Rating0.25 ACTUATION POINT NOMINAL GALLONS PER MINUTE
Contact Load Current Rating0.4 AMPERES RESISTIVE LOAD FIRST VOLTAGE
Features ProvidedELECTRICAL ACCESS PORT
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
4820-00-036-099312601 INTERCHANGEABLE
Seat,valve
Schneider Electric Systems Usa Inc
4310-00-124-9688 INTERCHANGEABLE
Vacuum Pump Unit,reciprocating
5950-00-211-199040-036580-01 INTERCHANGEABLE
Transformer,pulse
Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp Div Multiple
5977-00-435-011440183 INTERCHANGEABLE
Holder,electrical Contact Brush
Electro-Tec Corp Dba Moog Inc., Components Group
6210-00-516-1516L296U INTERCHANGEABLE
Fixture,lighting
Lithonia Lighting National Services Industries Inc Div
4730-00-700-061212-601 INTERCHANGEABLE
Packing Nut
Garwood/feller Inc Garwood Winch Div
3610-00-780-167612601 INTERCHANGEABLE
Screw,past Carrier
Smyth Mfg Co Sub of the Beacon Group
5920-00-916-066712-601 INTERCHANGEABLE
Fuse,plug
Miller Electric Mfg. Llc
6640-01-004-8498820 INTERCHANGEABLE
Microtome
Leica Inc Surveying and Photogrammetry Systems Div
1377-01-103-33501260-1 INTERCHANGEABLE
Gas Generator
Universal Propulsion Company Inc Dba Goodrich Div Universal Propulsion Co., Inc.
Cross-Reference Index
Part NumberManufacturer
12601 PRIMARY Thomas Products Llc (USA)
Related Parts
4820-00-036-0993INTERCHANGEABLE
SEAT,VALVE
12601
4310-00-124-9688INTERCHANGEABLE
VACUUM PUMP UNIT,RECIPROCATING
5950-00-211-1990INTERCHANGEABLE
TRANSFORMER,PULSE
40-036580-01
5977-00-435-0114INTERCHANGEABLE
HOLDER,ELECTRICAL CONTACT BRUSH
40183
6210-00-516-1516INTERCHANGEABLE
FIXTURE,LIGHTING
L296U
4730-00-700-0612INTERCHANGEABLE
PACKING NUT
12-601
3610-00-780-1676INTERCHANGEABLE
SCREW,PAST CARRIER
12601
5920-00-916-0667INTERCHANGEABLE
FUSE,PLUG
12-601
6640-01-004-8498INTERCHANGEABLE
MICROTOME
820
1377-01-103-3350INTERCHANGEABLE
GAS GENERATOR
1260-1
5962-01-108-5142INTERCHANGEABLE
MICROCIRCUIT,MEMORY
4820-01-320-0195INTERCHANGEABLE
GAGGING ASSEMBLY,VALVE
12601.001

Frequently Asked Questions

What is NSN 5930-01-251-4977?

NSN 5930-01-251-4977 is a Switch,flow, manufactured by Thomas Products Llc, classified under FSC 5930 (No Item Name Available). Status: active.

What are the part numbers for NSN 5930-01-251-4977?

NSN 5930-01-251-4977 has 1 cross-referenced part number: 12601 (Thomas Products Llc).

What NSN replaces 5930-01-251-4977?

There are 12 known substitutes for 5930-01-251-4977: 4820-00-036-0993, 4310-00-124-9688, 5950-00-211-1990 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 12601?

Key specifications for 12601: Body Length: 4.125 INCHES NOMINAL IN; Distance Between Mounting Facility Centers: 2.375 INCHES NOMINAL IN; Unthreaded Mounting Hole Diameter: 0.281 INCHES NOMINAL IN; Nonpile-Up Contact Arrangement: 1 POLE, DOUBLE THROW, ONE POSITION MOMENTARY. 27 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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