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Datasheet. 3661801-1 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.
0.990in. and 1.000in. ⁓1/64"
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.
1.500in. ⁓1-1/2"
The style designation indicating the configuration that most nearly corresponds to the appearance of the head.
knurled no. 1
The length of a straight line which passes through the center of a circular head,and terminates at the circumference.
1.000in.
A measurement from the bottom to the top of the head,in distinction from depth.
0.190in. ⁓13/64"
A measurement of the longest dimension of the point,in distinction from width.
0.300in. and 0.320in.
The length of a straight line which passes through the center of a circular point,and terminates at the circumference.
0.160in. and 0.165in.
The style designation indicating the configuration that most nearly corresponds to the appearance of the point.
chamfer dog
The national stock number or the identification information of the end equipment for which the item is a part.
pacer dawn
The nominal length of a straight line which passes through the center of the threaded portion,and terminates at the circumference.
0.250in. ⁓1/4"
The number of threads on the item per linear inch measured on a line parallel to the thread axis.
20
90.0 degrees
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.
60 degree radius grove, 0.080 inchdiameter, 0.170in. from thread endto center of grove; altered item made from CL-23515, cage 99862; next assy 3661321
The chemical compound or mechanical mixture properties of which the item is fabricated.
steel corrosion resisting
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
Steel corrosion resisting
20
Knurled no. 1
0.990 inches minimum and 1.000 inches maximum
Right-hand
3a
Schedule B number: 7318152000
Bolts and bolts and their nuts or washers exported in the same shipment
FSC 5305 ⁓ Screws
NSN 5305-01-356-8629 THUMBSCREW
Used on pacer dawn. unc thread series 60 degree radius grove, 0.080 inchdiameter, 0.170" from thread endto center of grove; altered item made from cl-23515, cage 99862; next assy 3661321 20 thread quantity per inch knurled no. 1 head style 0.990" thread length right-hand 3a thread class
- NIIN
- 013568629
- NIIN Date
- 04/12/92
- Schedule B
- 7318152000
- Name Code
- 06673
- 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
- - Taiwan, Province of China
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3661801-1 / 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).
