6643057-003

6643057003 Plain Hexagon Nut

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Quality Commitment

Serving our customers with quality and safety first.

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AS9120 Certified by SAI Global

Datasheet. 6643057-003 specification

Thread Class
A numeric-alpha designator indicating the pitch diameter tolerance and an external or internal thread.

2b

Thread Direction
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

Nut Style
The style designation indicating the configuration that most nearly corresponds to the appearance of the nut.

hexagon

Nut Height

0.320in. and 0.337in. ⁓11/32"

End Item Identification
The national stock number or the identification information of the end equipment for which the item is a part.

mrap - cougar CAT1 A2

Width Across Flats
The shortest straight line between flats,perpendicular to the height.

0.5510in. and 0.5625in. ⁓37/64"

Thread Series
A designation indicating the diameter-pitch combination and the number of threads per measurement scale applied to a series of diameters.

unc

Thread Quantity Per Inch
The number of threads on the item per linear inch measured on a line parallel to the thread axis.

16

Nominal Thread Size
A designation that is used for the purpose of general identification of the thread.

0.375in. ⁓3/8"

Bearing Surface Type
Indicates the type of bearing surface.

chamfered or washer faced

Special Features
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.

nut, plain, hexagon

Material
The chemical compound or mechanical mixture properties of which the item is fabricated.

steel comp 302 or steel comp 303 or steel comp 304 or steel comp 316

Surface Treatment
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.

passivate

Surface Treatment Document And Classification
The specification,standard,or manufacturers reference,and the classification designation,such as type,class,grade,and the like,that identifies the surface treatment material.

QQ-P-35 fed spec single treatment response

Answers.

What quantity is this sold in?

1HD

What material is the plain hexagon nut made of ?

Steel comp 302 or steel comp 303 or steel comp 304 or steel comp 316

What is the thread quantity per inch?

16

What is the thread direction?

Right-hand

What is the thread class?

2b

What is the NSN for 6643057-003?

5310-00-913-8881

How is this classified for shipping?

Schedule B number: 7318160000
nmfc 093486
Nuts of iron or steel

What's the federal classification of 6643057-003?

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 5310-00-913-8881 NUT,PLAIN,HEXAGON

Used on mrap - cougar cat1 a2. passivate surface treated nut, plain, hexagon 16 thread quantity per inch right-hand 2b thread class

NIIN
009138881
NIIN Date
01/01/60
Schedule B
7318160000 
Name Code
01857
FIIG
A021A0
Item Weight
1.600lbs
Item Dimensions
--
QUP
Historical Price
$58.75 HD
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

Other Part Numbers Parts with same form, fit, and function by other manufacturers

1. 7237702P3 Cage D9182
2. 863015-2700 Cage D9182
3. G421085-8 Cage D9182
4. MS-F-51972-3 Cage D9182
5. MS16203-3 Cage D9182
6. MS51971C3 Cage D9182
7. A3013143-1 Cage 80063
8. MS51971-3 Cage 96906
9. 722 0150 000 PIECE 159 Cage 04579
10. 544-0109-080 Cage 04579
11. 544-0109-080 Cage 10941
12. 501-7368091 ITEM NO 38 Cage 53711
13. 0428-22 Cage 56232
14. 803-6397269 PC187 Cage 53711
15. 3/8-16UNC-2B, G R 316 Cage D9182
16. 2035478-022 Cage D9182
17. 4912541-02 Cage 03956
18. 2100-0223-001 Cage 06032
19. TIP01582 Cage 97403
20. 0740844 Cage S3002
21. HN-2012 Cage 94223
22. 125-4510928-41 Cage 51563
23. 205-4510947-42 Cage 51563
24. MS51971-3 Cage 80205
25. 203MS052P013 Cage 1FH08
26. 203MS052P013 Cage 3B150
27. 4912541-02 Cage 90536
28. 62799012 Cage H0632
29. 13218E0320-293 Cage 97403
30. 13218E0320 Cage 97403
31. 859279-00 Cage 32345
32. 5310009138881 Cage SCY13

Major End Users Countries and entities

  • - office of The Secretary of Transportation 
  • - National Aeronautics And Space Administration 
  • - National Aeronautics And Space Administration 
  • - National Aeronautics And Space Administration 
  • - National Aeronautics And Space Administration 
  • - Department of The Army 
  • - Department of The Navy 
  • - Department of The Air Force 
  • - National Security Agency 
  • - U.s. Marine Corps 
  • - U.s. Coast Guard 
  • - National Weather Service 
  • - Defense Threat Reduction Agency 
  • - Austria 
  • - Lithuania 
  • - Poland 
  • - Bulgaria 
  • - Brazil 
  • - Spain 
  • - Israel 
  • - Singapore 
  • - Morocco 
  • - Thailand 
  • - Australia 
  • - Belgium 
  • - Canada 
  • - New Zealand 
  • - France 
  • - Germany 
  • - Republic of Korea 
  • - United Kingdom 
  • - Netherlands 
  • - Portugal 
  • - Italy 
  • - Denmark 
  • - Greece 
  • - Norway 
  • - Turkey 

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Shipping Information

Special Handling
Other or no special handling required (sh) 
LTL (less than a truck load rating)
Rating variable 
LCL (less than a car load rating)
Unknown
Special Cargo
No special type of cargo code applicable 
Air Freight (Minimum cargo door size required)
Shipment is not a consolidation and does not exceed 84 inches in any dimension. 
Customs Requirement Classification
Construction materials: includes paint and related materials, prefabricated building, wood products, metal and composition mater 
Commodity (for shipments via water)
Bolts or nuts (iron or steel),(less than 35 feet) 
NMFC (national motor freight code)
093486 BOLTS,NUTS OR SCREWS, NOI (SUB 3) 
UFC (universal freight code)
48950 

Similar by Design Other nuts with similar characteristics

Nothing similar to this part number was found in our inventory

6643057-003 / Nut,plain,hexagonWhat is the formal definition of this item?

A nut, flat on top and bottom having 6 flat sides. for items which have internal tapered or straight (parallel) pipe threads, specific electrical conduit size designation, and which when installed, provide a method of tightening to lock the connection, see locknut, electrical conduit. see also locknut, tube fitting. 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.)