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Datasheet. AIC548-5-21 specification
A measurement of the extent of threads,including incomplete threads,along a line parallel to the longitudinal axis.
0.568in. ⁓37/64"
The style designation indicating the configuration that most nearly corresponds to the appearance of the head.
flat top elevator
The length of a straight line which passes through the center of a circular head,and terminates at the circumference.
0.429in.
0.3110in.
A measurement from the bottom to the top of the head,in distinction from depth.
0.071in. ⁓5/64"
The included angle of the countersink.
100.0 degrees
The name assigned to the item by the government agency or commercial organization controlling the design of the item.
100 deg reduced flush head
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.
mat: inconel 718; 125 ksi fsu
A designation distinguishing one group of thread diameter-pitch combinations from another by the number of threads per measurement scale for a specific diameter.
unjf
Answers.
Unjf
Flat top elevator
0.568 inches
FSC 5305 ⁓ Screws
NSN 5305-01-601-8139 SCREW,CLOSE TOLERANCE
unjf thread series mat: inconel 718; 125 ksi fsu 100 deg reduced flush head flat top elevator head style 0.568" thread length
- NIIN
- 016018139
- NIIN Date
- 01/26/12
- Schedule B
- Name Code
- 29294
- 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
- - Netherlands
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AIC548-5-21 / Screw,close toleranceWhat is the formal definition of this item?
A screw, machine or screw, cap, socket head whose unthreaded portion is of specified grip length, plated or unplated, and is machined to a tolerance of one thousandth (0.001 in.) (0.025 mm) or less of a specific diameter for items (1.000 in.) (25 mm) or less in diameter. items over (1.000 in.) (25 mm) in diameter shall have a tolerance of fifteen ten thousandths (0.0015 in.) (0.038 mm) or less. the nominal major diameter of the threads shall be at least one thousandth (0.001 in.) (0.025 mm) below the minimum shank diameter, but not below the minimum major diameter for applicable class of fit, as shown in the screw thread standards, fed std h28 and/or other nationally recognized standards. the head is designed to be held or driven with an inserted driver. it is not designed for rotation by the thumb and fingers. a locking feature may be incorporated in the design of the head or threads.
