Model: NAS720-8-6

Assembled Washer Screw

Properties:

Thread Class
2a
Thread Direction
Right-hand
Thread Length
0.266 inches
Fastener Length
Between 0.343 inches and 0.375 inches
Head Style
Pan no. 2
Head Diameter
Between 0.306 inches and 0.322 inches
Head Height
Between 0.085 inches and 0.096 inches
Washer Quantity
2
Internal Drive Style
Cross recess type iii
Thread Diameter
0.164 inches
Thready Qty Per Inch (tpi)
32
Min. Tensile Strength (psi)
55000 pounds per square inch
Secondary Washer Relationship To Primary Washer
Not identical
Secondary Washer Style
Flat
Primary Washer Outside Diameter
0.296 inches
Secondary Washer Outside Diameter
Between 0.307 inches and 0.317 inches
Primary Washer Style
Split helical ring
Primary Washer Material Thickness
0.040 inches
Secondary Washer Material Thickness
Between 0.013 inches and 0.019 inches
Material
Steel comp 1010 fastener
Material
Steel comp 1017 secondary washer or steel comp 1020 secondary washer or steel comp 1025 secondary washer
Material
Steel comp 1060 primary washer or steel comp 1561 primary washer or steel comp 1566 primary washer or steel comp 1069 primary washer or steel comp 1070 primary washer or steel comp 1071 primary washer or steel comp 1572 primary washer or steel comp 1074 primary washer or steel comp 1075 primary washer or steel comp 1078 primary washer or steel comp 1080 primary washer
Material Specification
Astm a 29 assn standard all material responses primary washer
Material Specification
Qq-s-634 federal specification single material response fastener or qq-s-737 federal specification single material response fastener
Surface Treatment
Cadmium and chromate
Surface Treatment Specification
Qq-p-416, type 2, class 2 federal specification all treatment responses
Thread Series Designator
Unc
Specification Data
80205-nas720 professional/industrial association standard
NSN
5305-01-420-1784
Part Number
NAS720-8-6
Description
Screw,assembled Washer
CAGE
80205

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

Part NAS720-8-6 NSN 5305-01-420-1784

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: 7318152000
  • SITC: 69421
  • End Use: Iron and steel products, other
  • NAICS: 332722
  • USDA: 1

Freight Class: Bolts and bolts and their nuts or washers exported in the same shipment

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