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Datasheet. 2B989 specification
A numeric-alpha designator indicating the pitch diameter tolerance and an external or internal thread.
2b
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.
prevailing torque all metal design
The style designation indicating the configuration that most nearly corresponds to the appearance of the nut.
single ball seat, hexagon
0.750in.
0.938in. ⁓61/64"
The shortest straight line between flats,perpendicular to the height.
1.625in. ⁓1-5/8"
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.
18
A designation that is used for the purpose of general identification of the thread.
0.625in. ⁓5/8"
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.
0.156 inch wide by 0.250 inch deep slot across hex face
The chemical compound or mechanical mixture properties of which the item is fabricated.
steel comp 1018
The specification,standard,or manufacturers reference,and the classification designation,such as class,condition,temper,and the like,that identifies the material.
66 fed std single material response
Answers.
Steel comp 1018
18
Right-hand
2b
Schedule B number: 7318160000
Nuts of iron or steel
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 5310-00-423-8949 NUT,SELF-LOCKING,SINGLE BALL SEA
0.156 inch wide by 0.250 inch deep slot across hex face 18 thread quantity per inch right-hand 2b thread class
- NIIN
- 004238949
- NIIN Date
- 01/01/63
- Schedule B
- 7318160000
- Name Code
- 29732
- FIIG
- A021A0
- QUP
- Historical Price
- $2.78 EA
- 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
- - Turkey
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2B989 / Nut,self-locking,single ball seaWhat is the formal definition of this item?
A nut having one convex, spherical bearing surface and 6 flat sides. items may have a removable collar. an integral feature is incorporated for locking on the threads of a mating member. see also nut (1), self-locking, cone seat, hexagon.
