PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

23040Valve Flapper,pump

Industrial Technologies and Services Llc · NSN 4320-00-104-2027 · FSC 4320 · No Item Name Available
Verified by PartsTable
NSN 4320-00-104-2027 — this item is cataloged by the U.S. Government under National Stock Number 4320-00-104-2027. Primary manufacturer part number: 23040.
Features
  • Valve Flapper,pump — FSC 4320
  • Overall Diameter: 4.875 INCHES NOMINAL IN
  • Overall Thickness: 0.125 INCHES NOMINAL IN
  • Mounting Hole Diameter: 0.390 INCHES NOMINAL IN
  • Material: RUBBER SYNTHETIC AND STEEL
  • Mounting Hole Quantity: 4
  • 2 verified cross-references
  • Primary manufacturer: Industrial Technologies and Services Llc
Applications
  • Fluid transfer and circulation
  • Cooling system maintenance
  • Industrial process pumping
  • Flow control in piping systems
  • Pressure regulation
General Description

The Valve Flapper,pump, cataloged under National Stock Number 4320-00-104-2027, is classified within Federal Supply Class 4320 (No Item Name Available) of the Pumps and Compressors group. The primary manufacturer of record is Industrial Technologies and Services Llc. Government technical data includes 5 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 2 commercial cross-references from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 6 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4320-00-104-2027
Primary Part Number23040
Item NameValve Flapper,pump
FSC / FSG4320 / 43 — No Item Name Available
ManufacturerIndustrial Technologies and Services Llc
StatusACTIVE
Overall Diameter4.875 INCHES NOMINAL IN
Overall Thickness0.125 INCHES NOMINAL IN
Mounting Hole Diameter0.390 INCHES NOMINAL IN
MaterialRUBBER SYNTHETIC AND STEEL
Mounting Hole Quantity4
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 6
6685-00-276-130823040 INTERCHANGEABLE
Psychrometer
H-B Instrument Co
1680-00-476-008723040 INTERCHANGEABLE
Handla and Knob Ass
B E Aerospace Inc Services Div
3455-00-812-3584 INTERCHANGEABLE
Cutter,milling,end
3110-00-876-4387 INTERCHANGEABLE
Bearing,roller,self-Aligning
2530-01-047-9566NW23040 INTERCHANGEABLE
Parts Kit,hydraulic Brake Wheel
Tld Wollard Llc
5133-01-382-437523040 INTERCHANGEABLE
Cutter,hole Forming,drive Shank
Keo Cutters Div of Masco Corp
Cross-Reference Index
Part NumberManufacturer
A14413CS Industrial Technologies and Services Llc (USA)
23040 PRIMARY Industrial Technologies and Services Llc (USA)
Related Parts
6685-00-276-1308INTERCHANGEABLE
PSYCHROMETER
23040
1680-00-476-0087INTERCHANGEABLE
HANDLA AND KNOB ASS
23040
3455-00-812-3584INTERCHANGEABLE
CUTTER,MILLING,END
3110-00-876-4387INTERCHANGEABLE
BEARING,ROLLER,SELF-ALIGNING
2530-01-047-9566INTERCHANGEABLE
PARTS KIT,HYDRAULIC BRAKE WHEEL
NW23040
5133-01-382-4375INTERCHANGEABLE
CUTTER,HOLE FORMING,DRIVE SHANK
23040

Frequently Asked Questions

What is NSN 4320-00-104-2027?

NSN 4320-00-104-2027 is a Valve Flapper,pump, manufactured by Industrial Technologies and Services Llc, classified under FSC 4320 (No Item Name Available). Status: active.

What are the part numbers for NSN 4320-00-104-2027?

NSN 4320-00-104-2027 has 2 cross-referenced part numbers: A14413CS (Industrial Technologies and Services Llc), 23040 (Industrial Technologies and Services Llc).

What NSN replaces 4320-00-104-2027?

There are 6 known substitutes for 4320-00-104-2027: 6685-00-276-1308, 1680-00-476-0087, 3455-00-812-3584 and 3 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 23040?

Key specifications for 23040: Overall Diameter: 4.875 INCHES NOMINAL IN; Overall Thickness: 0.125 INCHES NOMINAL IN; Mounting Hole Diameter: 0.390 INCHES NOMINAL IN; Material: RUBBER SYNTHETIC AND STEEL. 6 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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