Model: MS21317-45

Thumbscrew

Properties:

Thread Class
2a
Thread Direction
Right-hand
Thread Length
Between 0.869 inches and 0.969 inches
Fastener Length
Between 0.969 inches and 1.031 inches
Head Style
Thumb no. 4
Head Height
Between 0.470 inches and 0.560 inches
Width Between Flats
Between 0.690 inches and 0.830 inches
Point Style
Flat
Thread Diameter
0.250 inches
Thready Qty Per Inch (tpi)
20
Material
Steel
Material Specification
66 federal standard single material response
Surface Treatment
Cadmium and chromate
Surface Treatment Specification
Qq-p-416, type 2, cl 3 federal specification all treatment responses
Thread Series Designator
Unc
NSN
5305-00-890-0037
Part Number
MS21317-45
Description
Thumbscrew
CAGE

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 MS21317-45 NSN 5305-00-890-0037

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:
A
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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