Model: 81559-524

Extended Washer Self-locking Nut

Special Features:

Color red

Properties:

Thread Class
3b
Thread Direction
Right-hand
Locking Feature
Prevailing torque all metal design
Washer Outside Diameter
Between 0.532 inches and 0.538 inches
Counterbore Diameter
0.346 inches nut and 0.350 inches nut
Lubrication
Soluble lubricant
Overall Height
0.430 inches
Nut Style
Hexagon
Nut Counterbore Depth
0.117 inches nut and 0.127 inches nut
Width Across Flats
Between 0.367 inches and 0.376 inches
Thread Series
Unjf
Thready Qty Per Inch (tpi)
24
Thread Size
0.312 inches
Material
Aluminum alloy 7075
Material Specification
Qq-a-225/9, t73 federal specification single material response
Surface Treatment
Anodize
Surface Treatment Specification
Mil-a-8625 military specification single treatment response
NSN
5310-01-265-6134
Part Number
81559-524
Description
Nut,self-locking,extended Washer
CAGE
56878

A nut having 6 flat sides and an integral washer which extends beyond the flats or periphery. An integral feature is incorporated for locking on the threads of a mating member.

Part 81559-524 NSN 5310-01-265-6134

INC
FIIG
Concept No.
App. Key
Cond. Code
Status
INC:
29730
FIIG:
A021A0
Concept No.:
1
App. Key:
BT
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:
X

Freight Classification

NMFC
UFC
LTL
LCL
WCC
TCC
SHC
ACC
NMFC:
013540
UFC:
05680
LTL:
70.0
LCL:
--
WCC:
713
TCC:
Z
SHC:
9
ACC:
Construction Materials

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Schedule B and Export
  • Schedule B: 7616995095
  • SITC: 69979
  • End Use: Finished metal shapes
  • NAICS: 332999
  • USDA: 1

Freight Class: Articles of aluminum nesoi

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