Model: NAS720B4-3

Assembled Washer Screw

Properties:

Thread Class
2a
Thread Direction
Right-hand
Thread Length
0.107 inches
Fastener Length
0.188 inches
Head Style
Pan no. 2
Head Diameter
Between 0.205 inches and 0.219 inches
Head Height
Between 0.058 inches and 0.068 inches
Washer Quantity
2
Internal Drive Style
Slot
Thread Diameter
0.112 inches
Thready Qty Per Inch (tpi)
40
Secondary Washer Relationship To Primary Washer
Not identical
Secondary Washer Style
Flat
Primary Washer Outside Diameter
0.209 inches
Secondary Washer Outside Diameter
Between 0.213 inches and 0.223 inches
Primary Washer Style
Split helical ring
Primary Washer Material Thickness
0.025 inches
Secondary Washer Material Thickness
Between 0.013 inches and 0.019 inches
Material
Copper alloy
Surface Treatment
Tin
Thread Series Designator
Unc
Specification Data
80205-nas720 professional/industrial association standard
NSN
5305-01-412-1449
Part Number
NAS720B4-3
Description
Screw,assembled Washer
CAGE
80205

A screw, (as modified) to which has been assembled one or more nonremovable washer(s).

Part NAS720B4-3 NSN 5305-01-412-1449

INC
FIIG
Concept No.
App. Key
Cond. Code
Status
INC:
06660
FIIG:
A003B0
Concept No.:
App. Key:
SA
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:
BA
CRITL:
X

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Schedule B and Export
  • Schedule B: 7415338550
  • SITC: 69433
  • End Use: Finished metal shapes
  • NAICS: 332722
  • USDA: 1

Freight Class: Other copper screws (not for wood) bolts and nuts

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