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Datasheet. DAA7257D351-001 specification
A numeric-alpha designator indicating the pitch diameter tolerance and an external or internal thread.
2a
The direction of the thread when viewed axially. a right-hand thread winds in a clockwise direction while a left-hand thread winds in a counterclockwise direction.
RIGHT-Hand
A measurement of the extent of threads,including incomplete threads,along a line parallel to the longitudinal axis.
0.687in. ⁓11/16"
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.
2.780in. ⁓2-25/32"
The style designation indicating the configuration that most nearly corresponds to the appearance of the head.
flat countersunk undercut
The length of a straight line which passes through the center of a circular head,and terminates at the circumference.
0.687in.
A measurement from the bottom to the top of the head,in distinction from depth.
0.350in. ⁓23/64"
The style designation indicating the configuration that most nearly corresponds to the appearance of the internal drive.
hexagon
The nominal length of a straight line which passes through the center of the threaded portion,and terminates at the circumference.
0.375in. ⁓3/8"
The shortest straight line between flats,perpendicular to the height.
0.375in. and 0.378in. ⁓25/64"
The number of threads on the item per linear inch measured on a line parallel to the thread axis.
16
A designation distinguishing one group of thread diameter-pitch combinations from another by the number of threads per measurement scale for a specific diameter.
unc
Answers.
Unc
16
Flat countersunk undercut
0.687 inches
Right-hand
2a
FSC 5305 ⁓ Screws
NSN 5305-01-392-1640 SCREW,CAP,SOCKET HEAD
unc thread series 16 thread quantity per inch flat countersunk undercut head style 0.687" thread length right-hand 2a thread class
- NIIN
- 013921640
- NIIN Date
- 06/24/94
- Schedule B
- Name Code
- 16282
- FIIG
- A003B0
- QUP
- Historical Price
- $2,784.48 EA
- 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
Other Part Numbers Parts with same form, fit, and function by other manufacturers
Major End Users Countries and entities
- - Department of The Air Force
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DAA7257D351-001 / Screw,cap,socket headWhat is the formal definition of this item?
An externally threaded fastener whose threaded portion is of one nominal diameter. the head has an internal socket or multiple spline for use with an inserted driver. a locking feature may be incorporated in the design of the head or threads. excludes items with bevel (conical) heads. see bolt, internal wrenching. excludes screw, shoulder; and screw, machine.
