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Thumbscrew NSN 5305-01-241-2641

Item Description

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).

NSN 5305-01-241-2641 NSN: 5305-01-241-2641

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Features and Characteristics

Thread Class
3a
Thread Direction
Right-hand
Thread Length
1.000 inches
Fastener Length
7.420 inches
Head Style
Knurled no. 1
Head Diameter
0.500 inches
Head Height
0.380 inches
Point Style
Flat
Thread Diameter
0.250 inches
Thready Qty Per Inch (tpi)
28
Part Name Assigned By Controlling Agency
Navy special project
Special Features
Hole drilled in center of head 0.048 inch min 0.083 inch max dia; 0.184 inch max deep; countersunk 60 degrees to 0.187 inch diameter max optional
Material
Copper alloy
Material Specification
Ams4640 assn standard single material response
Thread Series Designator
Unjf
FSC
5305 Screws
NIIN
012412641
NSN
5305012412641

Manufacturer Part Numbers

Part numbers registered to this national stock number.
Part Number
Cage
Status
MSDS
Part Number:
74D291037-2061
Cage Code:
76301
Status:
A
MSDS:
Part Number:
74D291037
Cage Code:
76301
Status:
A
MSDS:
Part Number:
PL74D291037
Cage Code:
76301
Status:
A
MSDS:

Foreign Trade & Schedule B

What is a Schedule B number? Find more information at help.cbp.gov
  • Schedule B Number: 7415338550
  • NAICS: 332722
  • SITC: 69433
  • Description: Other copper screws (not for wood) bolts and nuts
  • End Use (Code 12300):
    Finished metal shapes

Q & A

Frequently asked questions for NSN 5305-01-241-2641
What are the manufacturers of nsn 5305012412641?
Does this nsn 5305012412641 have a shelf life?
No. This NSN does not have an applicable shelf life.
What is the formal definition of nsn 5305012412641
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).
Does nsn 5305012412641 contain any precious metals?
No precious metal content.
Does nsn 5305012412641 contain any hazardous materials?
No MSDS. No hazardous material.
What is the ESD classification of nsn 5305012412641?
No known electrostatic discharge.

Identification Group

Item Identification Guide (IIG) and Item Name Code (INC)
INC
FIIG
App. Key
Cond. Code
Status
INC:
06673
FIIG:
A003B0
App. Key:
SR
Cond. Code:
1
Status:
A

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