Double Hexagon Self-Locking Nut
55LH6521-070
(NSN) National Stock Number
5310-00-255-5008
Federal Supply Classification
5310 Nuts and Washers
Item Name Code
05276
Schedule B Code
7318160000
Summary
3b thread class, right-hand thread direction, prevailing torque all metal design locking feature, soluble lubricant lubrication, double hexagon nut style, 0.372 inches maximum nut height
| DAC | HCC | DMIL | RNCC |
|---|---|---|---|
| 5 | - | - | 5 |
| RNVC | SADC | MSDS | RNAAC |
|---|---|---|---|
| 9 | - | - | SB |
Identification
A nut having 12 drive points and 24 sides. The bearing surface may be washer faced. An integral locking feature is incorporated in the design of the head or in the threads.
| INC | FIIG | Concept | Condition |
|---|---|---|---|
| 05276 | A021A0 | 1 | 1 |
Specifications
Thread Class
3b
Details
A numeric-alpha designator indicating the pitch diameter tolerance and an external or internal thread.Thread Direction
right-hand
Details
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.Locking Feature
prevailing torque all metal design
Details
An element inserted into the fastener,or a design feature,that enables the fastener to effectively resist vibration and rotation.Lubrication
soluble lubricant
Details
A substance designed to provide a reduction of friction between the two surfaces in contact.Nut Style
double hexagon
Details
The style designation indicating the configuration that most nearly corresponds to the appearance of the nut.Nut Height
0.372 inches maximum
Details
None.Width Across Flats
0.679 inches minimum and 0.690 inches maximum
Details
The shortest straight line between flats,perpendicular to the height.Temp Rating
-65.0 deg fahrenheit minimum and 450.0 deg fahrenheit maximum
Details
A value which expresses the degree of heat or cold as applied to the operation,or limitation of operation,of an item.Thread Series
unjf
Details
A designation indicating the diameter-pitch combination and the number of threads per measurement scale applied to a series of diameters.Thread Quantity Per Inch
20
Details
The number of threads on the item per linear inch measured on a line parallel to the thread axis.Hardness Rating
38.0 rockwell c minimum and 45.0 rockwell c maximum
Details
A numeric value that reflects the hardness of an item when used in conjunction with a hardness rating scale.Nominal Thread Size
0.438 inches
Details
A designation that is used for the purpose of general identification of the thread.Bearing Surface Type
chamfered
Details
Indicates the type of bearing surface.Bearing Surface Finish
125.0 microinches
Details
Designates the specific roughness rating of the bearing surface,representing the arithmetic average deviation of the surface from the meanline in profile.Material
steel comp 8740 overall or steel comp 8630 overall or steel comp 4037 overall or steel comp h11 overall
Details
The chemical compound or mechanical mixture properties of which the item is fabricated.Material Document And Classification
ams 6322 assn std 1st material response overall or ams 6280 assn std 2nd material response overall or ams 6300 assn std 3rd material response overall or ams 6304 assn std 4th material response overall
Details
The specification, standard, or manufacturer's reference and the classification designation, such as class, condition, temper, and the like, that identifies the material.Surface Treatment
cadmium overall
Details
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.Surface Treatment Document And Classification
qq-p-416,ty 2,cl 2 fed spec single treatment response overall
Details
The specification,standard,or manufacturers reference,and the classification designation,such as type,class,grade,and the like,that identifies the surface treatment material.Master-Cross Reference List
| Part | CAGE | DAC | HCC | RNCC | RNVC | MSDS | RNAAC |
|---|---|---|---|---|---|---|---|
| STSCD002-14 | 98897 | 2 | - | 7 | 2 | - | SB |
| 68456-7 | 56878 | 5 | - | 3 | 2 | - | SB |
| 68456-7 | 50392 | 5 | - | 5 | 9 | - | SB |
Material and Special Handling
Hazardous material, precious metals, criticality, and electrostatic discharge indicators.
| HMIC | PMIC | ESD/EMI | Criticality |
|---|---|---|---|
| N | U | - | - |
Freight
Universal / National Freight and Handling Information
| UFC | HMC | LTL | LCL |
|---|---|---|---|
| 48950 | - | W | - |
| RVC | WCC | TCC | SHC |
|---|---|---|---|
| - | 573 | Z | 9 |
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Manufacturer
FAQs
Frequently asked questions for NSN 5310-00-255-5008
What is the NIIN of the NSN 5310-00-255-5008?
The National Item Identification Number (NIIN) of the NSN 5310-00-255-5008 is 00-255-5008
When the NSN 5310-00-255-5008 was assigned to the Federal Catalog?
It was assigned 51 years ago, on Wed, Jun 20, 1973
Does the NSN 5310-00-255-5008 contain any precious metals?
Type/content is unknown
Does the NSN 5310-00-255-5008 contain any hazardous material?
No data in HMIRS
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