PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

TMS-3377Valve Flapper,pump

Clark-Reliance Llc Dba Jacoby-Tarbox · NSN 4320-01-542-3120 · FSC 4320 · No Item Name Available
Verified by PartsTable
NSN 4320-01-542-3120 — this item is cataloged by the U.S. Government under National Stock Number 4320-01-542-3120. Primary manufacturer part number: TMS-3377.
Features
  • Valve Flapper,pump — FSC 4320
  • Material: STEEL CORROSION RESISTING
  • 3 verified cross-references
  • Primary manufacturer: Clark-Reliance Llc Dba Jacoby-Tarbox
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 4320-01-542-3120, is classified within Federal Supply Class 4320 (No Item Name Available) of the Pumps and Compressors group. The primary manufacturer of record is Clark-Reliance Llc Dba Jacoby-Tarbox. Government technical data includes 1 verified specification, sourced from the Federal Logistics Information System (FLIS). This item has 3 commercial cross-references 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
NSN4320-01-542-3120
Primary Part NumberTMS-3377
Item NameValve Flapper,pump
FSC / FSG4320 / 43 — No Item Name Available
ManufacturerClark-Reliance Llc Dba Jacoby-Tarbox
StatusACTIVE
MaterialSTEEL CORROSION RESISTING
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 11
6685-00-537-2463 INTERCHANGEABLE
Movement
9540-00-554-999644444 INTERCHANGEABLE
Channel,structural
Aluminum Co of America
5940-00-578-90342352176-002 INTERCHANGEABLE
Terminal,stud
Lockheed Martin Corporation Div Rms - Mitchel Field
5930-00-583-826020452 INTERCHANGEABLE
Switch,lever
Sigma Tek, Inc.
1680-00-673-3195W20452 INTERCHANGEABLE
Pivot Bolt,windshie
Emerson Electric Co Alco Controls Div
4720-00-870-72011939284 INTERCHANGEABLE
Hose,preformed
Chrysler Realty Company Llc Dba Daimler Chrysler
5910-00-954-589220452 INTERCHANGEABLE
Capacitor,fixed,plastic Dielectr
American Shizuki Corp
5955-01-236-4256 INTERCHANGEABLE
Oscillator,crystal Controlled
6680-01-542-31472045-2 1-1/4 IN INTERCHANGEABLE
Indicator,sight,liquid
Clark-Reliance Llc Dba Jacoby-Tarbox
5950-01-614-0635192-36 INTERCHANGEABLE
Cover,electrical Transformer
Parker Hannifin Corporation Div Village Marine Tech
Cross-Reference Index
Part NumberManufacturer
TMS-3377 PRIMARY Clark-Reliance Llc Dba Jacoby-Tarbox (USA)
2045-2 PIECE NO 8 Clark-Reliance Llc Dba Jacoby-Tarbox (USA)
2045-2 Clark-Reliance Llc Dba Jacoby-Tarbox (USA)
Related Parts
6685-00-537-2463INTERCHANGEABLE
MOVEMENT
9540-00-554-9996INTERCHANGEABLE
CHANNEL,STRUCTURAL
44444
5940-00-578-9034INTERCHANGEABLE
TERMINAL,STUD
2352176-002
5930-00-583-8260INTERCHANGEABLE
SWITCH,LEVER
20452
1680-00-673-3195INTERCHANGEABLE
PIVOT BOLT,WINDSHIE
W20452
4720-00-870-7201INTERCHANGEABLE
HOSE,PREFORMED
1939284
5910-00-954-5892INTERCHANGEABLE
CAPACITOR,FIXED,PLASTIC DIELECTR
20452
5955-01-236-4256INTERCHANGEABLE
OSCILLATOR,CRYSTAL CONTROLLED
6680-01-542-3147INTERCHANGEABLE
INDICATOR,SIGHT,LIQUID
2045-2 1-1/4 IN
5950-01-614-0635INTERCHANGEABLE
COVER,ELECTRICAL TRANSFORMER
192-36
4460-01-646-9619INTERCHANGEABLE
COLLECTOR UNIT,DUST

Frequently Asked Questions

What is NSN 4320-01-542-3120?

NSN 4320-01-542-3120 is a Valve Flapper,pump, manufactured by Clark-Reliance Llc Dba Jacoby-Tarbox, classified under FSC 4320 (No Item Name Available). Status: active.

What are the part numbers for NSN 4320-01-542-3120?

NSN 4320-01-542-3120 has 3 cross-referenced part numbers: TMS-3377 (Clark-Reliance Llc Dba Jacoby-Tarbox), 2045-2 PIECE NO 8 (Clark-Reliance Llc Dba Jacoby-Tarbox), 2045-2 (Clark-Reliance Llc Dba Jacoby-Tarbox).

What NSN replaces 4320-01-542-3120?

There are 11 known substitutes for 4320-01-542-3120: 6685-00-537-2463, 9540-00-554-9996, 5940-00-578-9034 and 8 more. Verify interchangeability with system specifications before substitution.

What are the specifications of TMS-3377?

Key specifications for TMS-3377: End Item Identification: SIGHT FLOW INDICATOR STYLE 910-FA; Part Name Assigned by Controlling Agency: INAVY-FLAPPER; Material: STEEL CORROSION RESISTING. 3 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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