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Datasheet. PBF7521-12-74 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.
0.852in. ⁓55/64"
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.
5.477in. ⁓5-31/64"
The style designation indicating the configuration that most nearly corresponds to the appearance of the head.
spline drive shear head
The length of a straight line which passes through the center of a circular head,and terminates at the circumference.
1.270in.
A measurement from the bottom to the top of the head,in distinction from depth.
0.276in. ⁓9/32"
The length of a straight line which passes through the center of a hole,and terminates at the circumference.
0.141in. ⁓9/64"
The minimum load,applied perpendicularly to the longitudinal axis of an item,at which point the item will fracture when subjected to the standard single shear test method.
126000 pounds per square inch
A measurement of the longest dimension of the grip,in distinction from width.
5.477in.
The number of holes provided.
1
Indicates the type of hole(s) provided in the item.
drilled
A numeric value that reflects the hardness of an item when used in conjunction with a hardness rating scale.
46.0 rockwell c and 50.0 rockwell c
The name assigned to the item by the government agency or commercial organization controlling the design of the item.
bolt external wrenching
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.
spline drive, 132 ksi, mat: H-11 alloy steel per ams 6487
The chemical compound or mechanical mixture properties of which the item is fabricated.
steel
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.
cadmium
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
5.477 inches
0.141 inches
Spline drive shear head
0.852 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 5306-01-621-1046 BOLT,SHEAR
unjf thread series cadmium surface treated spline drive, 132 ksi, mat: h-11 alloy steel per ams 6487 bolt external wrenching 5.477" grip length 0.141" hole diameter spline drive shear head head style 0.852" thread length right-hand 3a thread class
- NIIN
- 016211046
- NIIN Date
- 08/23/13
- Schedule B
- 7318152000
- Name Code
- 15903
- 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
- - Republic of Korea
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PBF7521-12-74 / Bolt,shearWhat is the formal definition of this item?
A high strength, 160,000 pounds per square inch (1100 megapascals) minimum tensile strength externally threaded fastener designed for use in applications involving great shear stress. the head is designed to accommodate an external wrench or driver. 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. the unthreaded portion is of specific 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. a locking feature may be incorporated in the design of the head or threads. see bolt, machine and bolt, clevis.
