PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

6129Head Assembly,shut-Off Valve

Avox Systems Inc Dba Avox Systems Inc · NSN 4240-00-570-7993 · FSC 4240 · No Item Name Available
Verified by PartsTable
NSN 4240-00-570-7993 — this item is cataloged by the U.S. Government under National Stock Number 4240-00-570-7993. Primary manufacturer part number: 6129.
Features
  • Head Assembly,shut-Off Valve — FSC 4240
  • General Characteristics Item Description: 1 6111 SHUT-OFF VALVE SEAT; 1 6126 VALVE HEAD; NYLON SEAT TO BE FLUSH WITH END OF VALVE HEAD AND SQUARE WITH AXIS
  • 1 verified cross-reference
  • Primary manufacturer: Avox Systems Inc Dba Avox Systems Inc
Applications
  • Flow control in piping systems
  • Pressure regulation
  • Steam and fluid isolation
General Description

The Head Assembly,shut-Off Valve, cataloged under National Stock Number 4240-00-570-7993, is classified within Federal Supply Class 4240 (No Item Name Available) of the Fire Fighting, Rescue, and Safety Equipment group. The primary manufacturer of record is Avox Systems Inc Dba Avox Systems Inc. Government technical data includes 1 verified specification, 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
NSN4240-00-570-7993
Primary Part Number6129
Item NameHead Assembly,shut-Off Valve
FSC / FSG4240 / 42 — No Item Name Available
ManufacturerAvox Systems Inc Dba Avox Systems Inc
StatusACTIVE
General Characteristics Item Description1 6111 SHUT-OFF VALVE SEAT; 1 6126 VALVE HEAD; NYLON SEAT TO BE FLUSH WITH END OF VALVE HEAD AND SQUARE WITH AXIS
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
5950-00-137-8074111-046-0007 INTERCHANGEABLE
Coil,radio Frequency
Northrop Grumman Systems Corporation
5330-00-146-3154 INTERCHANGEABLE
Gasket
5355-00-162-9107 INTERCHANGEABLE
Knob
6220-00-190-6407428-R-6 INTERCHANGEABLE
Stop Light-Taillight,vehicular
Petersen Mfg Co Inc
5305-00-215-8008 INTERCHANGEABLE
Screw,machine
3020-00-289-794761-2-9 INTERCHANGEABLE
Gear,spur
Allard Nazarian Group, Inc. Dba Granite State Manufacturing
3825-00-493-28506129 INTERCHANGEABLE
Cylinder
Unimasco Inc
5955-00-525-5718154029P9 INTERCHANGEABLE
Crystal Unit,quartz
Bae Systems Information and Electronic Systems Integration Inc. Dba Bae Systems
5355-00-642-8011IDA2022 INTERCHANGEABLE
Knob
Ge Medical Systems
3110-00-767-0796158507R1 INTERCHANGEABLE
Ring,bearing,outer
Navistar Intl Corp Truck Br Ohio Plant
Cross-Reference Index
Part NumberManufacturer
6129 PRIMARY Avox Systems Inc Dba Avox Systems Inc (USA)
Related Parts
5950-00-137-8074INTERCHANGEABLE
COIL,RADIO FREQUENCY
111-046-0007
5330-00-146-3154INTERCHANGEABLE
GASKET
5355-00-162-9107INTERCHANGEABLE
KNOB
6220-00-190-6407INTERCHANGEABLE
STOP LIGHT-TAILLIGHT,VEHICULAR
428-R-6
5305-00-215-8008INTERCHANGEABLE
SCREW,MACHINE
3020-00-289-7947INTERCHANGEABLE
GEAR,SPUR
61-2-9
3825-00-493-2850INTERCHANGEABLE
CYLINDER
6129
5955-00-525-5718INTERCHANGEABLE
CRYSTAL UNIT,QUARTZ
154029P9
5355-00-642-8011INTERCHANGEABLE
KNOB
IDA2022
3110-00-767-0796INTERCHANGEABLE
RING,BEARING,OUTER
158507R1
5935-01-085-9020INTERCHANGEABLE
SOCKET,PLUG-IN ELECTRONIC COMPON
3110-01-178-1545INTERCHANGEABLE
BEARING
6-1-29

Frequently Asked Questions

What is NSN 4240-00-570-7993?

NSN 4240-00-570-7993 is a Head Assembly,shut-Off Valve, manufactured by Avox Systems Inc Dba Avox Systems Inc, classified under FSC 4240 (No Item Name Available). Status: active.

What are the part numbers for NSN 4240-00-570-7993?

NSN 4240-00-570-7993 has 1 cross-referenced part number: 6129 (Avox Systems Inc Dba Avox Systems Inc).

What NSN replaces 4240-00-570-7993?

There are 12 known substitutes for 4240-00-570-7993: 5950-00-137-8074, 5330-00-146-3154, 5355-00-162-9107 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 6129?

Key specifications for 6129: General Characteristics Item Description: 1 6111 SHUT-OFF VALVE SEAT; 1 6126 VALVE HEAD; NYLON SEAT TO BE FLUSH WITH END OF VALVE HEAD AND SQUARE WITH AXIS. 1 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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