NCS-428-4-20

NCS428420 Self-locking Stud

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Datasheet. NCS-428-4-20 specification

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

2a

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

Thread Length
A measurement of the extent of threads,including incomplete threads,along a line parallel to the longitudinal axis.

0.610in. and 0.640in. ⁓41/64"

Head Diameter
The length of a straight line which passes through the center of a circular head,and terminates at the circumference.

0.384in.

Head Length
A measurement of the longest dimension of a head,in distinction from width.

0.117in.

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

any acceptable

Overall Length
The dimension measured along the longitudinal axis with terminated points at the extreme ends of the item.

0.722in. and 0.762in. ⁓49/64"

Distance Across Flats
The distance across the flats.

0.438in.

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 comp 303

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

Style Designator
The style designation indicating the configuration that most nearly corresponds to the appearance of the item.

SELF-Locking

Thread Series Designator
A designation distinguishing one group of thread diameter-pitch combinations from another by the number of threads per measurement scale for a specific diameter.

unc

Answers.

What class is the thread series?

Unc

What is the style?

Self-locking

What material is the self-locking stud made of ?

Steel comp 303

What is the thread quantity per inch?

28

What is the thread length?

0.610 inches minimum and 0.640 inches maximum

What is the thread direction?

Right-hand

What is the thread class?

2a

What is the NSN for NCS-428-4-20?

5307-01-446-6698

What's the federal classification of NCS-428-4-20?

FSC 5307 ⁓ Studs

NSN 5307-01-446-6698 STUD,SELF-LOCKING

unc thread series self-locking passivate surface treated 28 thread quantity per inch 0.722" overall length 0.610" thread length right-hand 2a thread class

NIIN
014466698
NIIN Date
07/13/97
Schedule B
 
Name Code
27783
FIIG
A051A0
QUP
 
Historical Price
$2.73 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

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

1. 860336-342 Cage 06481
2. 860336-342 Cage 13973
3. 860336-342 Cage 13973
4. 860336-342 Cage 06481
5. 860336-342 Cage 13973
6. 860336-342 Cage 06481
7. 860336-342 Cage 13973

Major End Users Countries and entities

  • - 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)
Metal hardware 
NMFC (national motor freight code)
093486 BOLTS,NUTS OR SCREWS, NOI (SUB 3) 
UFC (universal freight code)
48950 

Similar by Design Other studs with similar characteristics

Nothing similar to this part number was found in our inventory

NCS-428-4-20 / Stud,self-lockingWhat is the formal definition of this item?

A headed fastener threaded externally on a portion or on the full length of the shank. the head has projections on the underside or periphery, or is otherwise designed to be mechanically pressed and embedded in a metallic panel, or the like. it is securely locked in position by the displaced metal. for items that require locking rings, see bolt, self-locking and stud, locked in. excludes insert, screw thread.