Model: 688-1864,5/8-11UNC-3B

Hexagon Self-locking Nut

Special Features:

Nuclear level 1

Properties:

Thread Class
3b
Thread Direction
Right-hand
Locking Feature
Prevailing torque with nonmetallic insert
Nut Style
Hexagon
Nut Height
Between 0.732 inches and 0.766 inches
Width Across Flats
Between 0.928 inches and 0.944 inches
Tempurature Rating
250.0 degrees fahrenheit
Thread Series
Unc
Thready Qty Per Inch (tpi)
11
Thread Size
0.625 inches
Countersink Angle
88.0 degrees nut
Criticality Code Justification
Zzzy
Bearing Surface Type
Chamfered or washer faced
Material
Nickel alloy 400 nut
Material
Plastic polyhexamethylene amide locking insert
Material Specification
Mil-s-20693, comp a, type 1 military specification single material response locking insert
Material Specification
Qq-n-281, cl.A federal specification single material response nut
Reference Number Differentiating Characteristics
Material will be in accordance with ships parts control center activity hx quality control, manufacturing and testing specifications
NSN
5310-01-202-8342
Part Number
688-1864,5/8-11UNC-3B
Description
Nut,self-locking,hexagon
CAGE
43689

A nut having a flat bottom and 6 sides. An integral feature is incorporated for locking on the threads of a mating member. Excludes nut (1), self-locking, cap.

Part 688-1864,5/8-11UNC-3B NSN 5310-01-202-8342

INC
FIIG
Concept No.
App. Key
Cond. Code
Status
INC:
05277
FIIG:
A021A0
Concept No.:
1
App. Key:
BK
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

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Schedule B and Export
  • Schedule B: 7508900000
  • SITC: 69975
  • End Use: Finished metal shapes
  • NAICS: 332999
  • USDA: 1

Freight Class: Other articles of nickel, nesoi (excluding cloth, grill & netting of nickel wire)

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