Octagon Plain Nut
A51B20528-11
(NSN) National Stock Number
5310-00-003-3888
Federal Supply Classification
5310 Nuts and Washers
Item Name Code
16979
Schedule B Code
7318160000
Summary
3b thread class, right-hand thread direction, plain, octagon nut style, 0.312 inches nominal nut height, 2.375 inches nominal width across flats, unj thread series
| DAC | HCC | DMIL | RNCC |
|---|---|---|---|
| 1 | - | - | C |
| RNVC | SADC | MSDS | RNAAC |
|---|---|---|---|
| 1 | 9X | - | ZZ |
Identification
A nut, flat on top and bottom, having eight flat sides. It may include a retaining dowel pin. For items having a thickness (or height) exceeding two times the width across the flats, use post, electrical-mechanical equipment. (when height or thickness and/or width across the flats is designated as a tolerance dimension, the maximum dimension will be used to determine compliance).
| INC | FIIG | Concept | Condition |
|---|---|---|---|
| 16979 | 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.Nut Style
plain, octagon
Details
The style designation indicating the configuration that most nearly corresponds to the appearance of the nut.Nut Height
0.312 inches nominal
Details
None.Width Across Flats
2.375 inches nominal
Details
The shortest straight line between flats,perpendicular to the height.Thread Series
unj
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
12
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
1.938 inches
Details
A designation that is used for the purpose of general identification of the thread.Countersink Angle
90.0 degrees nominal nut
Details
The included angle of the countersink.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.Part Name Assigned By Controlling Agency
navy special project
Details
The name assigned to the item by the government agency or commercial organization controlling the design of the item.Material
steel comp 630 overall
Details
The chemical compound or mechanical mixture properties of which the item is fabricated.Material Document And Classification
ams 5643 assn std single 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
passivate 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-35 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.Test Data Document
81349-mil-i-6868 specification (includes engineering type bulletins, brochures,etc., that reflect specification type data in specification format; excludes commercial catalogs, industry directories, and similar trade publications, reflecting general type data on certain environmental and performance requirements and test conditions that are shown as "typical", "average", "nominal", etc.).
Details
The specification,standard,drawing,or similar instrument that specifies environmental and performance requirements or test conditions under which an item is tested and establishes acceptable limits within which the item must conform identified by an alphabetic and/or numeric reference number. includes the commercial and government entity (cage) code of the entity controlling the instrument.Master-Cross Reference List
| Part | CAGE | DAC | HCC | RNCC | RNVC | MSDS | RNAAC |
|---|---|---|---|---|---|---|---|
| A51B20528-11 | 61174 | 1 | - | 3 | 9 | - | ZZ |
| A51B20528-11 | 26512 | 1 | - | 5 | 9 | - | ZZ |
Material and Special Handling
Hazardous material, precious metals, criticality, and electrostatic discharge indicators.
| HMIC | PMIC | ESD/EMI | Criticality |
|---|---|---|---|
| N | A | A | - |
Freight
Universal / National Freight and Handling Information
| UFC | HMC | LTL | LCL |
|---|---|---|---|
| 48950 | - | W | - |
| RVC | WCC | TCC | SHC |
|---|---|---|---|
| - | 573 | Z | 9 |
Certified Supplier
Order with confidence. We are a valued certified supplier serving customers in the military and aerospace industries.
- ISO9001 / AS9100 Quality Standards
- HAZMAT Certified
- On Time Delivery
- Qualified sales team
- Counterfeit Parts Prevention
- 100% Product Inspections
Manufacturer
NORTHROP GRUMMAN SYSTEMS CORPORATION
CAGE: 79RG9
JACKSONVILLE
, FL
, 32221-8130
UNITED STATES
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FAQs
Frequently asked questions for NSN 5310-00-003-3888
What is the NIIN of the NSN 5310-00-003-3888?
The National Item Identification Number (NIIN) of the NSN 5310-00-003-3888 is 00-003-3888
When the NSN 5310-00-003-3888 was assigned to the Federal Catalog?
It was assigned 52 years ago, on Fri, May 19, 1972
Does the NSN 5310-00-003-3888 contain any precious metals?
Does not contain precious metal
Does the NSN 5310-00-003-3888 contain any hazardous material?
No data in HMIRS
What is the ESD classification of NSN 5310-00-003-3888?
No known electrostatic discharge
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