Model: PLI-10-31.7

Preload Indicating Washer

Special Features:

Mean preload of 31, 700 lbs; 3 wiggle holes equally spaced radially

Properties:

Hole Diameter
0.626 inches
Outside Diameter
1.062 inches
Part Name Assigned By Controlling Agency
Preload indicating washer assembly
Color
Blue body
Material
Steel body
Surface Treatment
Cadmium body
Surface Treatment Specification
Qq-p-416, ty2 cl2 federal specification single treatment response body
Style Designator
Plain
NSN
5310-01-557-4222
Part Number
PLI-10-31.7
Description
Washer,preload Indicating
CAGE
56878

An item round in shape having a centrally located hole. It consists of two concentric (inner and outer) steel rings, the inner ring is smaller in diameter and higher than the other. These rings are sandwiched between two close tolerance plain washers. As the assembly is tightened, the inner ring takes the load and is deformed until the loose outer ring is bound between the upper and lower plain washers and cannot be moved. The tightened load in the bolt is equal to the load required to compress the inner ring. When the binding of the outer ring occurs and can not be moved, it is a sign that the desired load has been reached.

Part PLI-10-31.7 NSN 5310-01-557-4222

INC
FIIG
Concept No.
App. Key
Cond. Code
Status
INC:
42430
FIIG:
A022B0
Concept No.:
App. Key:
F
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:
A
ESD:
A
MMAC:
CRITL:
X

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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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