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Datasheet. 191999 specification
A numeric-alpha designator indicating the pitch diameter tolerance and an external or internal thread.
3b
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
An element inserted into the fastener,or a design feature,that enables the fastener to effectively resist vibration and rotation.
any acceptable
The style designation indicating the configuration that most nearly corresponds to the appearance of the nut.
castellated, hexagon
0.312in. ⁓5/16"
The shortest straight line between flats,perpendicular to the height.
0.428in. and 0.438in. ⁓29/64"
A value which expresses the degree of heat or cold as applied to the operation,or limitation of operation,of an item.
not rated
A designation indicating the diameter-pitch combination and the number of threads per measurement scale applied to a series of diameters.
unf
The number of threads on the item per linear inch measured on a line parallel to the thread axis.
28
A numeric value that reflects the hardness of an item when used in conjunction with a hardness rating scale.
not rated
A designation that is used for the purpose of general identification of the thread.
0.250in. ⁓1/4"
Indicates the type of bearing surface.
flat
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 or zinc
Answers.
28
Right-hand
3b
FSC 5310 ⁓ Nuts and washers
Note-nuts and washers, including specially designed, are to be classified in this fsc. a. nuts are a small metal block made in a variety of shapes such as square and hexagonal which is drilled and internally threaded. b. washers are a perforated piece of metal, leather, or other materials of various shapes or forms. they are used primarily as a seat for a bolt, nut, screw, rivet or nail to distribute pressure and prevent endwise motion over an area and/or to prevent movement between two parts by means of restraining features created by the shape of its edges.
Excluding bearing thrust washers (fsc 3120); shims (fsc 5365); ring spacers (fsc 5365); plate spacers (fsc 5365); lock rings (fsc 5365).
NSN 5310-01-031-6798 NUT,SELF-LOCKING,CASTELLATED,HEX
cadmium or zinc surface treated 28 thread quantity per inch right-hand 3b thread class
- NIIN
- 010316798
- NIIN Date
- 11/30/76
- Schedule B
- Name Code
- 29725
- FIIG
- A021A0
- 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
- - Greece
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191999 / Nut,self-locking,castellated,hexWhat is the formal definition of this item?
A nut having 6 flat sides, flat on the bottom and having a slotted cylindrical or dome shaped upper portion. an integral feature is incorporated for locking on the threads of a mating member. the slots when used in conjunction with a solid or split (cotter) pin, act as an extra "fail safe" feature in critical applications. excludes nut (1), self-locking, slotted, hexagon.
