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Datasheet. NASM21318-3 specification
The dimension,measured along a line parallel to the longitudinal axis,from the largest bearing surface of the fastener head to the extreme opposite end,or as specifically designated for other type fasteners.
0.250in. ⁓1/4"
The style designation indicating the configuration that most nearly corresponds to the appearance of the head.
round
The length of a straight line which passes through the center of a circular head,and terminates at the circumference.
0.090in. and 0.099in.
A measurement from the bottom to the top of the head,in distinction from depth.
0.026in. and 0.034in. ⁓3/64"
The length of a straight line which passes through the center of that portion used to guide the item and terminates at the circumference.
0.046in. and 0.049in.
The length of the pilot,which is the unthreaded portion beyond the thread used to guide the item.
0.047in.
The style designation indicating the configuration that most nearly corresponds to the appearance of a nonmachine thread.
drive screw (type u)
The length of a straight line which passes through the center of the nonmachine threaded portion,and terminates at the circumference.
0.060in.
The name assigned to the item by the government agency or commercial organization controlling the design of the item.
screw, drive, round head, type u, steel, carbon, cadmium plated
Those unusual or unique characteristics or qualities of an item not covered in the other requirements and which are determined to be essential for identification.
size is 0.058 or no. 00, 6 thrds in circumference, recommended hole size = 0.05267, drill size = 55
The chemical compound or mechanical mixture properties of which the item is fabricated.
steel
The specification,standard,or manufacturers reference,and the classification designation,such as class,condition,temper,and the like,that identifies the material.
NAS-21318 assn std all material responses
The metallic,nonmetallic,and/or chemical properties with which the item is plated,dipped,and/or coated.the treatment is designed to protect the surface(s) and cannot be wiped off.
cadmium
Answers.
Steel
Round
Schedule B number: 7318152000
Bolts and bolts and their nuts or washers exported in the same shipment
FSC 5305 ⁓ Screws
NSN 5305-01-585-3186 SCREW,DRIVE
cadmium surface treated size is 0.058 or no. 00, 6 thrds in circumference, recommended hole size = 0.05267, drill size = 55 screw, drive, round head, type u, steel, carbon, cadmium plated round head style
- NIIN
- 015853186
- NIIN Date
- 05/24/10
- Schedule B
- 7318152000
- Name Code
- 15896
- FIIG
- A003B0
- DEMIL / ITAR
- Uncontrolled item (Code A)
- Hazmat
- No hazard information available from HMIRS.
- MSDS
- N/A
- Precious Metals
- No precious metals
- Enviromental
- N/A
- Electrostatic ESD & EMI
- No ESD or EMI sensitivity
Major End Users Countries and entities
- - Germany
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NASM21318-3 / Screw,driveWhat is the formal definition of this item?
A hardened cylindrical fastener with multiple spiral flutes on its shank. it also has an end smaller in diameter than the outside diameter of the spiral flutes, which acts as a pilot when driven into a drilled hole.
