Model: 4374

Piston Ring

Properties:

Cross Sectional Shape
Straight face, double scraper, w/expander
Ring Style
Concentric
Radial Wall Thickness
Between 0.1840 inches and 0.1850 inches
Overall Width
Between 0.1350 inches and 0.1450 inches
Standard Bore Diameter
4.875 inches
Joint Style
Vertical joint
Oil Passage Type And Quantity
1 groove inside periphery
Oil Passage Type And Quantity
1 groove outside periphery
Oil Passage Type And Quantity
10 hole horizontally through ring
Material
Iron
Material
Steel expander
Surface Treatment
Any acceptable
Fsc Application Data
Engine, aircraft, reciprocating
NSN
2810-00-294-3523
Part Number
4374
Description
Ring,piston
CAGE
79606

A circular, single or multipiece item, metallic or nonmetallic in composition, designed to be fitted in a circumferential groove in a piston and to spring outward against the cylinder wall to function as a seal or wiper. It is supplied in various cross-sectional shapes and is cut through at one point to allow for installation in the piston ring groove. It may include an expander. Excludes packing, preformed; retainer, oil seal; retainer, packing; ring, retaining; ring wiper; and seal ring, metal.

Part 4374 NSN 2810-00-294-3523

INC
FIIG
Concept No.
App. Key
Cond. Code
Status
INC:
11459
FIIG:
A08400
Concept No.:
App. Key:
A
Cond. Code:
2
Status:
A

Material Classification

Hazardous material, precious metals, criticality, enviroment, and electrostatic discharge indicators
HMIC
PMIC
ESD/EMI
ENAC
MMAC
CRITL
HMIC:
N
PMIC:
A
ESD:
ESD:
MMAC:
CRITL:
X

Freight Classification

NMFC
UFC
LTL
LCL
WCC
TCC
SHC
ACC
NMFC:
126700
UFC:
64230
LTL:
85.0
LCL:
--
WCC:
593
TCC:
Z
SHC:
Z
ACC:
Equipment for Aircraft

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Schedule B and Export
  • Schedule B: 8409100080
  • SITC: 71319
  • End Use: Engines and turbines for military aircraft
  • NAICS: 336412
  • USDA: 1

Freight Class: Parts for spark-ignition or compression-ignition internal combustion piston engines for use in aircraft except civil

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