MS51866-18

MS5186618 Self-locking Spline Nut

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Quality Commitment

Serving our customers with quality and safety first.

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Datasheet. MS51866-18 specification

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

3b

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

Locking Feature
An element inserted into the fastener,or a design feature,that enables the fastener to effectively resist vibration and rotation.

prevailing torque with nonmetallic insert or prevailing torque all metal design

Pilot Diameter
The length of a straight line which passes through the center of that portion used to guide the item and terminates at the circumference.

0.384in. and 0.388in.

Pilot Length
The length of the pilot,which is the unthreaded portion beyond the thread used to guide the item.

0.173in. and 0.203in.

Nut Height

0.346in. and 0.406in. ⁓13/32"

Temp Rating
A value which expresses the degree of heat or cold as applied to the operation,or limitation of operation,of an item.

250.0 deg fahrenheit

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

unf

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

28

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

0.250in. ⁓1/4"

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

steel corrosion resisting nut

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.

cadmium except insert and chromate except insert

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-416 type 2 class 3 fed spec all treatment responses except insert

Answers.

When was the most recent contract awarded?

On 11/16/2007 under contract SPM5A908V0194 for qty 3,033

What quantity is this sold in?

1EA

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

Steel corrosion resisting nut

What is the thread quantity per inch?

28

What is the thread direction?

Right-hand

What is the thread class?

3b

What is the NSN for MS51866-18?

5310-01-069-6345

How is this classified for shipping?

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

What's the federal classification of MS51866-18?

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 5310-01-069-6345 NUT,SELF-LOCKING,SPLINE

cadmium except insert surface treated 28 thread quantity per inch right-hand 3b thread class

NIIN
010696345
NIIN Date
12/20/78
Schedule B
7318160000 
Name Code
15893
FIIG
A021A0
Item Weight
0.100lbs
Item Dimensions
--
QUP
Historical Price
$2.88 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

  • - Department of The Army 
  • - Department of The Air Force 
  • - Department of The Navy 
  • - Lithuania 
  • - Spain 
  • - New Zealand 
  • - Netherlands 
  • - Norway 
  • - Greece 
  • - 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

MS51866-18 / Nut,self-locking,splineWhat is the formal definition of this item?

A nut having an externally splined sleeve, which holds it in position when forced into a hole of slightly smaller diameter. an integral feature is incorporated for locking.