Model: A544-1

Thumbscrew

Special Features:

1/16 inch hole drilled through threaded portion 5/32 in. From shoulder bearing surface

Properties:

Thread Class
2a
Thread Direction
Right-hand
Thread Length
1.025 inches
Fastener Length
Between 0.975 inches and 1.025 inches
Head Style
Thumb no. 3
Head Height
Between 0.922 inches and 0.952 inches
Width Between Flats
Between 0.797 inches and 0.827 inches
Point Style
Oval
Thread Diameter
0.375 inches
Thready Qty Per Inch (tpi)
16
Material
Steel comp 1010
Material Specification
Sae assn standard single material response
Thread Series Designator
Unc
NSN
5305-00-579-5409
Part Number
A544-1
Description
Thumbscrew
CAGE
14028

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 A544-1 NSN 5305-00-579-5409

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

Freight Classification

NMFC
UFC
LTL
LCL
WCC
TCC
SHC
ACC
NMFC:
093486
UFC:
48950
LTL:
RATING VARIABLE
LCL:
50.0
WCC:
713
TCC:
Z
SHC:
9
ACC:
Construction Materials

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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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