Model: P249A7044REV1

Thumbscrew

Properties:

Thread Class
2a
Thread Direction
Right-hand
Thread Length
0.406 inches
Fastener Length
Between 1.270 inches and 1.280 inches
Head Style
Knurled no. 4
Head Diameter
0.500 inches
Head Height
Between 0.189 inches and 0.199 inches
Point Style
Oval
Thread Diameter
0.250 inches
Thready Qty Per Inch (tpi)
20
Material
Steel comp 303
Surface Treatment
Paint
Thread Series Designator
Unc
NSN
5305-00-568-2318
Part Number
P249A7044REV1
Description
Thumbscrew
CAGE
00798

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 P249A7044REV1 NSN 5305-00-568-2318

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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