PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

30-168Ring,piston

Hardie-Tynes Co., Inc. · NSN 4310-00-343-6249 · FSC 4310 · No Item Name Available
Verified by PartsTable
NSN 4310-00-343-6249 — this item is cataloged by the U.S. Government under National Stock Number 4310-00-343-6249. Primary manufacturer part number: 30-168.
Features
  • Ring,piston — FSC 4310
  • Material: IRON OVERALL
  • Material Document and Classification: QQ-I-652,CLASS 40 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
  • Joint Style: VERTICAL JOINT
  • Cross-Sectional Shape Style: PLAIN RECTANGULAR, TWO PIECE, STRAIGHT FACE
  • Ring Style: CONCENTRIC
  • Radial Wall Thickness: 0.2970 INCHES NOMINAL IN
  • Standard Bore Diameter: 7.750 INCHES IN
Applications
  • Applications requiring Iron Overall construction
General Description

The Ring,piston, cataloged under National Stock Number 4310-00-343-6249, is classified within Federal Supply Class 4310 (No Item Name Available) of the Pumps and Compressors group. The primary manufacturer of record is Hardie-Tynes Co., Inc.. Government technical data includes 7 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. 6 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4310-00-343-6249
Primary Part Number30-168
Item NameRing,piston
FSC / FSG4310 / 43 — No Item Name Available
ManufacturerHardie-Tynes Co., Inc.
StatusACTIVE
MaterialIRON OVERALL
Material Document and ClassificationQQ-I-652,CLASS 40 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
Joint StyleVERTICAL JOINT
Cross-Sectional Shape StylePLAIN RECTANGULAR, TWO PIECE, STRAIGHT FACE
Ring StyleCONCENTRIC
Radial Wall Thickness0.2970 INCHES NOMINAL IN
Standard Bore Diameter7.750 INCHES IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 6
2540-00-731-126187900-20 INTERCHANGEABLE
Bag Assembly,washer
Trico Products Corporation
4720-01-003-106414303-099-00 INTERCHANGEABLE
Hose,nonmetallic
Upright Inc
5930-01-270-6083 INTERCHANGEABLE
Switch,sensitive
5310-01-308-5776 INTERCHANGEABLE
Nut,plain,castellated,hexagon
6665-01-542-448320004050-019 INTERCHANGEABLE
Kit,syring,valve8
Battelle Memorial Institute
5331-01-659-75663-0168 INTERCHANGEABLE
O-Ring
Namjet Llc
Cross-Reference Index
Part NumberManufacturer
30-168 Hardie-Tynes Co., Inc. (USA)
Related Parts
2540-00-731-1261INTERCHANGEABLE
BAG ASSEMBLY,WASHER
87900-20
4720-01-003-1064INTERCHANGEABLE
HOSE,NONMETALLIC
14303-099-00
5930-01-270-6083INTERCHANGEABLE
SWITCH,SENSITIVE
5310-01-308-5776INTERCHANGEABLE
NUT,PLAIN,CASTELLATED,HEXAGON
6665-01-542-4483INTERCHANGEABLE
KIT,SYRING,VALVE8
20004050-019
5331-01-659-7566INTERCHANGEABLE
O-RING
3-0168

Frequently Asked Questions

What is NSN 4310-00-343-6249?

NSN 4310-00-343-6249 is a Ring,piston, manufactured by Hardie-Tynes Co., Inc., classified under FSC 4310 (No Item Name Available). Status: active.

What are the part numbers for NSN 4310-00-343-6249?

NSN 4310-00-343-6249 has 1 cross-referenced part number: 30-168 (Hardie-Tynes Co., Inc.).

What NSN replaces 4310-00-343-6249?

There are 6 known substitutes for 4310-00-343-6249: 2540-00-731-1261, 4720-01-003-1064, 5930-01-270-6083 and 3 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 30-168?

Key specifications for 30-168: Material: IRON OVERALL; Material Document and Classification: QQ-I-652,CLASS 40 FED SPEC SINGLE MATERIAL RESPONSE OVERALL; Joint Style: VERTICAL JOINT; Cross-Sectional Shape Style: PLAIN RECTANGULAR, TWO PIECE, STRAIGHT FACE. 8 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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