PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

9981Ring,piston

Hdt Expeditionary Systems Inc · NSN 4310-00-374-7353 · FSC 4310 · No Item Name Available
Verified by PartsTable
NSN 4310-00-374-7353 — this item is cataloged by the U.S. Government under National Stock Number 4310-00-374-7353. Primary manufacturer part number: 9981.
Features
  • Ring,piston — FSC 4310
  • 3 verified cross-references
  • Primary manufacturer: Hdt Expeditionary Systems Inc
Applications
  • Hydraulic and pneumatic systems
  • Industrial process pumping
  • Military vehicle hydraulics
General Description

The Ring,piston, cataloged under National Stock Number 4310-00-374-7353, is classified within Federal Supply Class 4310 (No Item Name Available) of the Pumps and Compressors group. The primary manufacturer of record is Hdt Expeditionary Systems Inc. This item has 3 commercial cross-references from 3 manufacturers, enabling identification through both NSN and commercial part number lookups. 8 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Catalog Facts
Item NameRing,piston
FSC / FSG4310 — No Item Name Available (FSG 43)
ManufacturersDavey Compressor Co Div of Keco Industries Inc (CAGE 16004); Drs Environmental Systems Inc (CAGE 5RQL2); Hdt Expeditionary Systems Inc (CAGE 92878)
Technical Specifications
ParameterValue
NSN4310-00-374-7353
Primary Part Number9981
Item NameRing,piston
FSC / FSG4310 / 43 — No Item Name Available
ManufacturerHdt Expeditionary Systems Inc
StatusACTIVE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 8
5955-00-499-7326712732-19 INTERCHANGEABLE
Crystal Unit,quartz
Raytheon Company Div Rmd Strategic
5330-00-524-8784 INTERCHANGEABLE
Seal,oil,track Roller
2940-00-580-6302 INTERCHANGEABLE
Filter Element,fluid
5130-00-705-233799-81 INTERCHANGEABLE
Nose Assembly,faste
Huck International, Inc. Div Kingston Operations
5950-00-890-96889981 INTERCHANGEABLE
Transformer,power
Standex Electronics, Inc.
5305-01-133-8955N09981 INTERCHANGEABLE
Screw,machine
Leslie Controls, Inc. Dba Leslie Controls Inc
6515-01-307-74500099810 INTERCHANGEABLE
Tube,drainage,surgical
C. R. Bard, Inc.
8340-01-467-9179 INTERCHANGEABLE
Steel Stake,pin Set
Cross-Reference Index
Part NumberManufacturer
9981 Davey Compressor Co Div of Keco Industries Inc (USA)
9981 Drs Environmental Systems Inc (USA)
9981 PRIMARY Hdt Expeditionary Systems Inc (USA)
Related Parts
5955-00-499-7326INTERCHANGEABLE
CRYSTAL UNIT,QUARTZ
712732-19
5330-00-524-8784INTERCHANGEABLE
SEAL,OIL,TRACK ROLLER
2940-00-580-6302INTERCHANGEABLE
FILTER ELEMENT,FLUID
5130-00-705-2337INTERCHANGEABLE
NOSE ASSEMBLY,FASTE
99-81
5950-00-890-9688INTERCHANGEABLE
TRANSFORMER,POWER
9981
5305-01-133-8955INTERCHANGEABLE
SCREW,MACHINE
N09981
6515-01-307-7450INTERCHANGEABLE
TUBE,DRAINAGE,SURGICAL
0099810
8340-01-467-9179INTERCHANGEABLE
STEEL STAKE,PIN SET

Frequently Asked Questions

What is NSN 4310-00-374-7353?

NSN 4310-00-374-7353 is a Ring,piston, manufactured by Hdt Expeditionary Systems Inc, classified under FSC 4310 (No Item Name Available). Status: active.

What are the part numbers for NSN 4310-00-374-7353?

NSN 4310-00-374-7353 has 3 cross-referenced part numbers: 9981 (Davey Compressor Co Div of Keco Industries Inc), 9981 (Drs Environmental Systems Inc), 9981 (Hdt Expeditionary Systems Inc).

What NSN replaces 4310-00-374-7353?

There are 8 known substitutes for 4310-00-374-7353: 5955-00-499-7326, 5330-00-524-8784, 2940-00-580-6302 and 5 more. Verify interchangeability with system specifications before substitution.

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