PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

11509Ring,wearing

Air & Liquid Systems Corporation Dba Buffalo Pumps · NSN 4320-00-911-2255 · FSC 4320 · No Item Name Available
Verified by PartsTable
NSN 4320-00-911-2255 — this item is cataloged by the U.S. Government under National Stock Number 4320-00-911-2255. Primary manufacturer part number: 11509.
Features
  • Ring,wearing — FSC 4320
  • Corner Shape: SQUARE ALL CORNERS
  • Body Inside Diameter: 2.467 INCHES MINIMUM AND 2.468 INCHES MAXIMUM IN
  • Body Outside Diameter: 2.682 INCHES MINIMUM AND 2.687 INCHES MAXIMUM IN
  • 1 verified cross-reference
  • Primary manufacturer: Air & Liquid Systems Corporation Dba Buffalo Pumps
Applications
  • Hydraulic and pneumatic systems
  • Industrial process pumping
  • Military vehicle hydraulics
General Description

The Ring,wearing, cataloged under National Stock Number 4320-00-911-2255, is classified within Federal Supply Class 4320 (No Item Name Available) of the Pumps and Compressors group. The primary manufacturer of record is Air & Liquid Systems Corporation Dba Buffalo Pumps. Government technical data includes 3 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. 10 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4320-00-911-2255
Primary Part Number11509
Item NameRing,wearing
FSC / FSG4320 / 43 — No Item Name Available
ManufacturerAir & Liquid Systems Corporation Dba Buffalo Pumps
StatusACTIVE
Corner ShapeSQUARE ALL CORNERS
Body Inside Diameter2.467 INCHES MINIMUM AND 2.468 INCHES MAXIMUM IN
Body Outside Diameter2.682 INCHES MINIMUM AND 2.687 INCHES MAXIMUM IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 10
3110-00-183-5759R455-6 INTERCHANGEABLE
Bearing,ball,annular
Schaeffler Aerospace Usa Corp Div Schaeffler Aerospace Usa Corporation
5133-00-236-4043 INTERCHANGEABLE
Drill,twist
5945-00-257-690055A6334CHANGE12ITEM6 INTERCHANGEABLE
Relay,electromagnetic
Westinghouse Electric Corp
2520-00-311-524411509 INTERCHANGEABLE
Eye,bolt,clutch
Sachs-Boge of America
5360-00-316-5519 INTERCHANGEABLE
Spring,limit Switch
5815-00-356-3340SC-B-69640 INTERCHANGEABLE
Bar,selector,teletypewriter
Us Army Communications & Electronics Materiel Readiness Command Logistics Engineering Dir
3830-00-371-61021L INTERCHANGEABLE
Shank-Tooth,surface Ripping
H & L Tooth Company Dba H & L Forge
4935-00-978-9779 INTERCHANGEABLE
Idler Assembly
5331-01-174-86185740099 INTERCHANGEABLE
O-Ring
Am General Llc
5975-01-176-344711509 INTERCHANGEABLE
Hanger,cable
Gardner Denver Water Jetting Systems, Inc. Div Engineered Package Group
Cross-Reference Index
Part NumberManufacturer
11509 PRIMARY Air & Liquid Systems Corporation Dba Buffalo Pumps (USA)
Related Parts
3110-00-183-5759INTERCHANGEABLE
BEARING,BALL,ANNULAR
R455-6
5133-00-236-4043INTERCHANGEABLE
DRILL,TWIST
5945-00-257-6900INTERCHANGEABLE
RELAY,ELECTROMAGNETIC
55A6334CHANGE12ITEM6
2520-00-311-5244INTERCHANGEABLE
EYE,BOLT,CLUTCH
11509
5360-00-316-5519INTERCHANGEABLE
SPRING,LIMIT SWITCH
5815-00-356-3340INTERCHANGEABLE
BAR,SELECTOR,TELETYPEWRITER
SC-B-69640
3830-00-371-6102INTERCHANGEABLE
SHANK-TOOTH,SURFACE RIPPING
1L
4935-00-978-9779INTERCHANGEABLE
IDLER ASSEMBLY
5331-01-174-8618INTERCHANGEABLE
O-RING
5740099
5975-01-176-3447INTERCHANGEABLE
HANGER,CABLE
11509

Frequently Asked Questions

What is NSN 4320-00-911-2255?

NSN 4320-00-911-2255 is a Ring,wearing, manufactured by Air & Liquid Systems Corporation Dba Buffalo Pumps, classified under FSC 4320 (No Item Name Available). Status: active.

What are the part numbers for NSN 4320-00-911-2255?

NSN 4320-00-911-2255 has 1 cross-referenced part number: 11509 (Air & Liquid Systems Corporation Dba Buffalo Pumps).

What NSN replaces 4320-00-911-2255?

There are 10 known substitutes for 4320-00-911-2255: 3110-00-183-5759, 5133-00-236-4043, 5945-00-257-6900 and 7 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 11509?

Key specifications for 11509: Special Features: FOUR 0.188 IN. DIA EQUALLY SPACED HOLES DRILLED THRU OD IN; Corner Shape: SQUARE ALL CORNERS; Body Inside Diameter: 2.467 INCHES MINIMUM AND 2.468 INCHES MAXIMUM IN; Overall Length: 0.500 INCHES NOMINAL IN. 5 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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