Model: 840475

Thumbscrew

Special Features:

Thread relief groove 0.109 in. W by 0.180 in. Max dia

Properties:

Thread Class
2a
Thread Direction
Right-hand
Thread Length
0.453 inches
Fastener Length
1.515 inches
Head Style
Wing no. 3
Head Height
0.562 inches
Width Between Flats
1.125 inches
Point Style
Flat
Thread Diameter
0.250 inches
Thready Qty Per Inch (tpi)
20
Shoulder Shape
Round all shoulders
Material
Steel comp 304
Material Specification
Qq-s-763 federal specification single material response
Thread Series Designator
Unc
NSN
5305-00-698-5299
Part Number
840475
Description
Thumbscrew
CAGE
56232

An externally threaded fastener whose threaded portion is of one nominal diameter. It may have an unthreaded portion with a diameter less than, equal to, or greater than the diameter of the threaded portion. It has either a vertically flattened, circular knurled, or wing type head, all of which are designed for rotation by the thumb and fingers. For items having wrenching facilities such as socket recess, multiple spline or slot heads, use screw (as modified) or bolt (as modified).

Part 840475 NSN 5305-00-698-5299

INC
FIIG
Concept No.
App. Key
Cond. Code
Status
INC:
06673
FIIG:
A003B0
Concept No.:
App. Key:
SR
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:
U
ESD:
ESD:
MMAC:
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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