Model: AA991B

Thumbscrew

Properties:

Thread Class
2a
Thread Direction
Right-hand
Thread Length
0.688 inches
Fastener Length
1.125 inches
Head Style
Knurled no. 1
Head Diameter
0.625 inches
Head Height
0.188 inches
Point Length
0.438 inches
Point Diameter
0.180 inches
Point Style
Chamfer dog
Thread Diameter
0.250 inches
Thready Qty Per Inch (tpi)
28
Point Chamfer Angle
14.0 degrees
Material
Copper alloy
Surface Treatment
Cadmium
Thread Series Designator
Unf
NSN
5305-00-763-3236
Part Number
AA991B
Description
Thumbscrew
CAGE
24123

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 AA991B NSN 5305-00-763-3236

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: 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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