Model: 355253S

Thumbscrew

Properties:

Thread Class
2a
Thread Direction
Right-hand
Thread Length
Between 0.552 inches and 0.572 inches
Fastener Length
Between 0.740 inches and 0.760 inches
Head Style
Wing no. 3
Head Height
Between 0.521 inches and 0.541 inches
Width Between Flats
Between 1.052 inches and 1.072 inches
Point Length
Between 0.178 inches and 0.198 inches
Point Style
Flat
Thread Diameter
0.250 inches
Thready Qty Per Inch (tpi)
20
Point Chamfer Angle
40.0 degrees
Material
Steel
Thread Series Designator
Unc
NSN
5305-00-361-7911
Part Number
355253S
Description
Thumbscrew
CAGE
57526

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 355253S NSN 5305-00-361-7911

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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