Model: 552

Thumbscrew

Special Features:

Furnished w/one nut

Properties:

Thread Class
2a
Thread Direction
Right-hand
Thread Length
0.312 inches
Fastener Length
0.688 inches
Head Style
Knurled no. 1
Head Diameter
0.250 inches
Head Height
0.500 inches
Shoulder Diameter
0.164 inches first shoulder
Shoulder Length
0.375 inches first shoulder
Point Style
Flat
Thread Diameter
0.164 inches
Thready Qty Per Inch (tpi)
32
Shoulder Shape
Round first shoulder
Material
Copper alloy
Thread Series Designator
Unc
NSN
5305-00-839-9350
Part Number
552
Description
Thumbscrew
CAGE
00443

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 552 NSN 5305-00-839-9350

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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