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Datasheet. 826555-1 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.
0.240in. and 0.260in. ⁓17/64"
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.
3.000in. ⁓3-1/64"
The style designation indicating the configuration that most nearly corresponds to the appearance of the head.
knurled no. 4
The length of a straight line which passes through the center of a circular head,and terminates at the circumference.
0.438in.
A measurement from the bottom to the top of the head,in distinction from depth.
0.500in. ⁓1/2"
0.145in. and 0.155in.
1.460in. and 1.500in.
The style designation indicating the configuration that most nearly corresponds to the appearance of the point.
flat
The nominal length of a straight line which passes through the center of the threaded portion,and terminates at the circumference.
0.190in. (UTS #10)
The number of threads on the item per linear inch measured on a line parallel to the thread axis.
32
The number of externally relieved diameters on the body,adjacent to the head.
1
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.
passivate
The specification,standard,or manufacturers reference,and the classification designation,such as type,class,grade,and the like,that identifies the surface treatment material.
F16 finish E-300 mfr ref single treatment response
A designation distinguishing one group of thread diameter-pitch combinations from another by the number of threads per measurement scale for a specific diameter.
unf
Answers.
Unf
32
Knurled no. 4
0.240 inches minimum and 0.260 inches maximum
Right-hand
2a
FSC 5305 ⁓ Screws
NSN 5305-01-144-9382 THUMBSCREW
unf thread series passivate surface treated 32 thread quantity per inch knurled no. 4 head style 0.240" thread length right-hand 2a thread class
- NIIN
- 011449382
- NIIN Date
- 12/31/82
- Schedule B
- Name Code
- 06673
- FIIG
- A003B0
- DEMIL / ITAR
- Uncontrolled item (Code A)
- Hazmat
- No hazard information available from HMIRS.
- MSDS
- N/A
- Precious Metals
- Metal content unknown
- Enviromental
- N/A
- Electrostatic ESD & EMI
- No ESD or EMI sensitivity
Major End Users Countries and entities
- - Germany
- - Italy
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826555-1 / ThumbscrewWhat is the formal definition of this item?
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).
