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Datasheet. K872318-021 specification
A numeric-alpha designator indicating the pitch diameter tolerance and an external or internal thread.
3a
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.
2.985in.
The length of a straight line which passes through the center of the grip,and terminates at the circumference.
0.4990in. and 0.4995in.
The national stock number or the identification information of the end equipment for which the item is a part.
SH-2G
The nominal length of a straight line which passes through the center of the threaded portion,and terminates at the circumference.
0.500in. ⁓1/2"
The number of threads on the item per linear inch measured on a line parallel to the thread axis.
20
The name assigned to the item by the government agency or commercial organization controlling the design of the item.
BOLT-Engine mounting
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.
nha pn K872301
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
20
3a
FSC 5306 ⁓ Bolts
NSN 5306-01-475-8698 BOLT,CLOSE TOLERANCE
Used on SH-2G. unjf thread series nha pn K872301 bolt-engine mounting 20 thread quantity per inch 3a thread class
- NIIN
- 014758698
- NIIN Date
- 06/15/00
- Schedule B
- Name Code
- 27851
- 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
- - New Zealand
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K872318-021 / 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.
