91581A355

91581A355 Self-locking Hexagon Nut

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Datasheet. 91581A355 specification

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

2

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

0.203in. ⁓13/64"

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

2540-01-566-6751; gunners seat and restraint system

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

0.437in. ⁓7/16"

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

unc

Hardness Rating
A numeric value that reflects the hardness of an item when used in conjunction with a hardness rating scale.

32.0 rockwell c

Part Name Assigned By Controlling Agency
The name assigned to the item by the government agency or commercial organization controlling the design of the item.

1/4-20 nylon lock nut

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.

finish: black LUSTER-Coated; inch thread size: 0.250 INCH-20; astm specifications: astm B117; note: coating does not interfere with thread enganement; withstands salt spray of 500 hours; nuts shorter than 4in. are fully threaded; nuts longer than 4in. are not continuously threaded

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

plastic nylon locking insert

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

steel except insert

Answers.

What material is the self-locking hexagon nut made of ?

Steel except insert

What material is the self-locking hexagon nut made of ?

Plastic nylon locking insert

What is the thread direction?

Right-hand

What is the thread class?

2

What is the NSN for 91581A355?

5310-01-570-1858

How is this classified for shipping?

Schedule B number: 8710000090
nmfc 093486
Parts of armored fighting vehicles,motorized, whether or not fitted with weapons

What's the federal classification of 91581A355?

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 5310-01-570-1858 NUT,SELF-LOCKING,HEXAGON

Used on 2540-01-566-6751;gunners seat and restraint system. finish: black luster-coated; inch thread size: 0.250 inch-20; astm specifications: astm B117; note: coating does not interfere with thread enganement; withstands salt spray of 500 hours; nuts shorter than 4" are fully threaded; nuts longer than 4" are not continuously threaded 1/4-20 nylon lock nut right-hand 2 thread class

NIIN
015701858
NIIN Date
12/17/08
Schedule B
8710000090 
Name Code
05277
FIIG
A021A0
QUP
 
Historical Price
$2.88 EA
DEMIL / ITAR
Uncontrolled item (Code A)
Hazmat
No hazard information available from HMIRS.
MSDS
N/A
Precious Metals
No precious metals
Enviromental
N/A
Electrostatic ESD & EMI
No ESD or EMI sensitivity

Major End Users Countries and entities

  • - Department of The Army 
  • - Department of The Navy 
  • - U.s. Marine Corps 
  • - Department of The Air Force 

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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

91581A355 / Nut,self-locking,hexagonWhat is the formal definition of this item?

A nut having a flat bottom and 6 sides. an integral feature is incorporated for locking on the threads of a mating member. excludes nut (1), self-locking, cap.