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Datasheet. NAS1801-08-37 specification
A numeric-alpha designator indicating the pitch diameter tolerance and an external or internal thread.
3a
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.
0.1640in. ⁓11/64"
The style designation indicating the configuration that most nearly corresponds to the appearance of the head.
hexagon
The length of a straight line which passes through the center of a circular head,and terminates at the circumference.
0.251in.
A measurement from the bottom to the top of the head,in distinction from depth.
0.110in. ⁓1/8"
The name assigned to the item by the government agency or commercial organization controlling the design of the item.
screw, hex head, cruciform recess
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.
full thread, alloy steel, 160 ksi ftu
A designation distinguishing one group of thread diameter-pitch combinations from another by the number of threads per measurement scale for a specific diameter.
unjc
Answers.
Unjc
Hexagon
0.1640 inches
Right-hand
3a
FSC 5305 ⁓ Screws
NSN 5305-01-622-1154 SCREW,MACHINE
unjc thread series full thread, alloy steel, 160 ksi ftu screw, hex head, cruciform recess hexagon head style 0.1640" thread length right-hand 3a thread class
- NIIN
- 016221154
- NIIN Date
- 09/27/13
- Schedule B
- Name Code
- 06657
- FIIG
- A500D0
- DEMIL / ITAR
- Uncontrolled item (Code )
- Hazmat
- No hazard information available from HMIRS.
- MSDS
- N/A
- Precious Metals
- --
- Enviromental
- N/A
- Electrostatic ESD & EMI
- No ESD or EMI sensitivity
Major End Users Countries and entities
- - Spain
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NAS1801-08-37 / Screw,machineWhat is the formal definition of this item?
An externally threaded fastener whose threaded portion is of one nominal diameter, no 0 (0.060 in./1.5 mm) or larger, designed to be held or driven with either a wrench or an inserted driver or both (excluding internal socket or internal multiple spline types), in sizes below no. 10 (0.190 in./5 mm). no. 10 and larger sizes must have a head designed for any type inserted driver (excluding internal socket or internal multiple spline types), but may also be designed for external wrenching. a locking feature may be incorporated in the design of the head or threads. excludes bolt, clevis; bolt, externally relieved body; screw, externally relieved body; and screw, assembled washer. see also, screw, instrument; bolt, machine; bolt, internal wrenching; and screw, cap socket head.
