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Datasheet. ST3M747-3-6 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.
0.331in. ⁓11/32"
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.
0.706in. ⁓23/32"
The style designation indicating the configuration that most nearly corresponds to the appearance of the head.
spline drive shear head
A measurement from the bottom to the top of the head,in distinction from depth.
0.140in. ⁓9/64"
The length of a straight line which passes through the center of the grip,and terminates at the circumference.
0.1890in. and 0.1895in.
0.386in.
The national stock number or the identification information of the end equipment for which the item is a part.
F-15Sa
The nominal length of a straight line which passes through the center of the threaded portion,and terminates at the circumference.
0.1900in. (UTS #10)
A measurement of the longest dimension of the grip,in distinction from width.
0.375in.
The number of threads on the item per linear inch measured on a line parallel to the thread axis.
32
The chemical compound or mechanical mixture properties of which the item is fabricated.
steel comp XM-13
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
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
Steel comp xm-13
32
0.375 inches
Spline drive shear head
0.331 inches
Right-hand
3a
Schedule B number: 7318152000
Bolts and bolts and their nuts or washers exported in the same shipment
FSC 5306 ⁓ Bolts
NSN 5306-01-624-6749 BOLT,CLOSE TOLERANCE
Used on F-15SA. unjf thread series passivate surface treated 32 thread quantity per inch 0.375" grip length spline drive shear head head style 0.331" thread length right-hand 3a thread class
- NIIN
- 016246749
- NIIN Date
- 01/11/14
- Schedule B
- 7318152000
- Name Code
- 27851
- FIIG
- A003B0
- 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
- - Department of The Air Force
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ST3M747-3-6 / Bolt,close toleranceWhat is the formal definition of this item?
An externally threaded fastener whose unthreaded portion is of a specified grip length, plated or unplated, and is machined to a tolerance of one thousandth (0.001) of an inch (0.025 mm) or less of a specific diameter for items one inch (25 mm) or less in diameter. items over one inch (25 mm) in diameter shall have a tolerance of fifteen ten-thousandths (0.0015) of an inch (0.038 mm) or less. the nominal major diameter of the threads shall be at least one thousandth (0.001) of an inch (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 not designed to be held or driven with an inserted driver, nor is it designed for rotation by the thumb and fingers. a locking feature may be incorporated in the design of the head or threads. for items having close tolerance, and fabricated from material having 160,000 pounds per square inch (1100 megapascals) minimum tensile strength, see bolt, shear. for items fabricated from material having less than 160,000 pounds per square inch (1100 megapascals) minimum tensile strength and not having a close tolerance, see bolt, machine.
