Model: 2670-57 ITEM 82

Lock Washer

Properties:

Hole Diameter
Between 0.255 inches and 0.263 inches
Outside Diameter
0.489 inches
Material Thickness
Between 0.062 inches and 0.072 inches
Hardness Rating
Between 35.0 rockwell c and 53.0 rockwell c
Criticality Code Justification
Zzzy
Material
Steel comp 420 or steel comp 301 or steel comp 302 or steel comp 302b or steel comp 303 or steel comp 303se or steel comp 304 or steel comp 304l or steel comp 305 or steel comp 308 or steel comp 309 or steel comp 309s or steel comp 310 or steel comp 310s or steel comp 314 or steel comp 316 or steel comp 316l or steel comp 317 or steel comp 321 or steel comp 347 or steel comp 348 or steel comp 384 or steel comp 385
Material Specification
66 federal standard all material responses
Special Test Features
Special quality control testing
Style Designator
Split helical-right hand
Nondefinitive Specification/std Data
B class or c class and 2 style
Reference Number Differentiating Characteristics
As differentiated by material which must conform to ships parts control center special quality control provisions and certified free from mercury contamination
NSN
5310-01-180-2559
Part Number
2670-57 ITEM 82
Description
Washer,lock
CAGE
43689

A washer which is usually round with a centrally located hole. Its edges and two bearing surfaces are so designed that applied pressure brings into play the spring tension and/or frictional locking principle which materially resists any tendency toward turning. It may be made of one or two pieces

Part 2670-57 ITEM 82 NSN 5310-01-180-2559

INC
FIIG
Concept No.
App. Key
Cond. Code
Status
INC:
14218
FIIG:
A022B0
Concept No.:
1
App. Key:
A
Cond. Code:
1
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:
Y

Freight Classification

NMFC
UFC
LTL
LCL
WCC
TCC
SHC
ACC
NMFC:
194160
UFC:
55210
LTL:
50.0
LCL:
--
WCC:
713
TCC:
Z
SHC:
9
ACC:
Construction Materials

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Schedule B and Export
  • Schedule B: 7318210000
  • SITC: 69422
  • End Use: Finished metal shapes
  • NAICS: 332722
  • USDA: 1

Freight Class: Spring washers and other lock washers, iron or steel

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