PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

MILC555Compressor Unit,rotary

Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M · NSN 4310-00-203-0569 · FSC 4310 · No Item Name Available
Verified by PartsTable
NSN 4310-00-203-0569 — this item is cataloged by the U.S. Government under National Stock Number 4310-00-203-0569. Primary manufacturer part number: MILC555.
Features
  • Compressor Unit,rotary — FSC 4310
  • Unloader Type: AUTOMATIC
  • Silencer Type: INLET
  • Prime Mover Type: DIESEL ENGINE
  • Mounting Type: WHEEL
  • Rotary Compressor Design: SLIDING VANE
  • Nondefinitive Spec/std Data: 2 TYPE AND 2 CLASS AND 600CFM AT 100 PSI SIZE
  • Duty Cycle in Percent: 100
Applications
  • Hydraulic and pneumatic systems
  • Industrial process pumping
  • Military vehicle hydraulics
General Description

The Compressor Unit,rotary, cataloged under National Stock Number 4310-00-203-0569, is classified within Federal Supply Class 4310 (No Item Name Available) of the Pumps and Compressors group. The primary manufacturer of record is Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M. Government technical data includes 15 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 2 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN4310-00-203-0569
Primary Part NumberMILC555
Item NameCompressor Unit,rotary
FSC / FSG4310 / 43 — No Item Name Available
ManufacturerMilitary Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
StatusCANCELLED
Unloader TypeAUTOMATIC
Silencer TypeINLET
Prime Mover TypeDIESEL ENGINE
Mounting TypeWHEEL
Rotary Compressor DesignSLIDING VANE
Nondefinitive Spec/std Data2 TYPE AND 2 CLASS AND 600CFM AT 100 PSI SIZE
Duty Cycle in Percent100
Discharge Flow Rate600.000 CUBIC FEET PER MINUTE
Discharge Pressure100.000 POUNDS PER SQUARE INCH GAGE LBS
Compressor Quantity1
Cooling System DesignMIXED
Compressed Gas Cooling MediumOIL
Prime Mover Cooling MediumFRESH WATER
Gas for Which DesignedAIR
Compressor Cooling MediumOIL
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 12
4310-00-075-5251 INTERCHANGEABLE
Compressor Unit,reciprocating
4310-00-075-7064 INTERCHANGEABLE
Compressor Unit,rotary
4310-00-078-2462 INTERCHANGEABLE
Compressor Unit,rotary
4310-00-136-4369 INTERCHANGEABLE
Compressor Unit,rotary
4310-00-248-3496 INTERCHANGEABLE
Compressor Unit,rotary
4310-00-256-9319 INTERCHANGEABLE
Compressor Unit,rotary
4310-00-376-8768 INTERCHANGEABLE
Compressor Unit,reciprocating
4310-00-471-3075RMS250 INTERCHANGEABLE
Compressor Unit,rotary
Ingersoll Rand Co
4310-00-508-3361376HG INTERCHANGEABLE
Compressor Unit,reciprocating
Dresser Industries Inc Leroi Div
4310-00-595-3867 INTERCHANGEABLE
Compressor Unit,rotary
Cross-Reference Index
Part NumberManufacturer
MILC555 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
M1LSTD431 Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M
Related Parts
4310-00-075-5251INTERCHANGEABLE
COMPRESSOR UNIT,RECIPROCATING
4310-00-075-7064INTERCHANGEABLE
COMPRESSOR UNIT,ROTARY
4310-00-078-2462INTERCHANGEABLE
COMPRESSOR UNIT,ROTARY
4310-00-136-4369INTERCHANGEABLE
COMPRESSOR UNIT,ROTARY
4310-00-248-3496INTERCHANGEABLE
COMPRESSOR UNIT,ROTARY
4310-00-256-9319INTERCHANGEABLE
COMPRESSOR UNIT,ROTARY
4310-00-376-8768INTERCHANGEABLE
COMPRESSOR UNIT,RECIPROCATING
4310-00-471-3075INTERCHANGEABLE
COMPRESSOR UNIT,ROTARY
RMS250
4310-00-508-3361INTERCHANGEABLE
COMPRESSOR UNIT,RECIPROCATING
376HG
4310-00-595-3867INTERCHANGEABLE
COMPRESSOR UNIT,ROTARY
4310-00-595-3868INTERCHANGEABLE
COMPRESSOR UNIT,ROTARY
4310-00-608-1146INTERCHANGEABLE
COMPRESSOR UNIT,RECIPROCATING
G321

Frequently Asked Questions

What is NSN 4310-00-203-0569?

NSN 4310-00-203-0569 is a Compressor Unit,rotary, manufactured by Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M, classified under FSC 4310 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 4310-00-203-0569?

NSN 4310-00-203-0569 has 2 cross-referenced part numbers: MILC555 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), M1LSTD431 (Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M).

What NSN replaces 4310-00-203-0569?

There are 12 known substitutes for 4310-00-203-0569: 4310-00-075-5251, 4310-00-075-7064, 4310-00-078-2462 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of MILC555?

Key specifications for MILC555: Unloader Type: AUTOMATIC; Silencer Type: INLET; Prime Mover Type: DIESEL ENGINE; Mounting Type: WHEEL. 15 total characteristics are documented in the Federal Logistics Information System.

Is NSN 4310-00-203-0569 still in active supply?

NSN 4310-00-203-0569 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.

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