Model: 257B

Piston Ring

Properties:

Cross Sectional Shape
Beveled face scraper, ventilated oil control
Ring Style
Concentric
Radial Wall Thickness
Between 0.2950 inches and 0.3050 inches
Overall Width
Between 0.3000 inches and 0.3110 inches
Standard Bore Diameter
8.875 inches
Joint Style
Step joint
Oil Passage Type And Quantity
8 slot horizontally through ring
Material
Iron
NSN
4310-00-173-5268
Part Number
257B
Description
Ring,piston
CAGE
0AT62

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 257B NSN 4310-00-173-5268

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:
U
ESD:
ESD:
MMAC:
CRITL:
X

Packaging & Shipping

Est. Pack Size
Est. Pack Weight
Est. Item Weight
Est. Item Dim.
Pack Size:
--
Paclk Weight:
0.1000lbs
Item Weight:
--
Item Dim:
--
OPI
SPI No.
SPI Rev.
SPC Mkg.
LVL A
LVL B
OPI:
O
SPI No.:
SPI Rev.:
SPC Mkg:
00
LVL_A:
Q
LVL_B:
Q

Freight Classification

NMFC
UFC
LTL
LCL
WCC
TCC
SHC
ACC
NMFC:
126700
UFC:
64230
LTL:
85.0
LCL:
77.5
WCC:
594
TCC:
Z
SHC:
9
ACC:
Trailers/Vehicles

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Schedule B and Export
  • Schedule B: 8414902095
  • SITC: 74380
  • End Use: Industrial engines
  • NAICS: 333912
  • USDA: 1

Freight Class: Parts nesoi, of compressors other than refrigerating and air conditioning compressors

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