91251A426

91251A426 Cap Socket Head Screw

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Datasheet. 91251A426 specification

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

3a

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.

1.250in. ⁓1-1/4"

Fastener Length
The dimension,measured along a line parallel to the longitudinal axis,from the largest bearing surface of the fastener head to the extreme opposite end,or as specifically designated for other type fasteners.

1.625in. ⁓1-5/8"

Head Style
The style designation indicating the configuration that most nearly corresponds to the appearance of the head.

flat fillister

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

0.562in.

Head Height
A measurement from the bottom to the top of the head,in distinction from depth.

0.375in. ⁓3/8"

Internal Drive Style
The style designation indicating the configuration that most nearly corresponds to the appearance of the internal drive.

hexagon

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

F-15Sa

Nominal Thread Diameter
The nominal length of a straight line which passes through the center of the threaded portion,and terminates at the circumference.

0.375in. ⁓3/8"

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

0.312in. ⁓5/16"

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

24

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

37.0 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.

socket head cap screw

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.

black oxide alloy steel

Color
A characteristic of light that can be specified in terms of luminance,dominant wavelength,and purity.

black

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

iron alloy

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.

oxide iron

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.

unf

Answers.

What class is the thread series?

Unf

What material is the cap socket head screw made of ?

Iron alloy

What is the thread quantity per inch?

24

What is the head style?

Flat fillister

What is the thread length?

1.250 inches

What is the thread direction?

Right-hand

What is the thread class?

3a

What is the NSN for 91251A426?

5305-01-642-6241

How is this classified for shipping?

Schedule B number: 7318152000
Bolts and bolts and their nuts or washers exported in the same shipment

What's the federal classification of 91251A426?

FSC 5305 ⁓ Screws

NSN 5305-01-642-6241 SCREW,CAP,SOCKET HEAD

Used on F-15SA. unf thread series oxide iron surface treated black oxide alloy steel socket head cap screw 24 thread quantity per inch flat fillister head style 1.250" thread length right-hand 3a thread class

NIIN
016426241
NIIN Date
03/03/15
Schedule B
7318152000 
Name Code
16282
FIIG
A003B0
DEMIL / ITAR
Uncontrolled item (Code )
Hazmat
No hazard information available from HMIRS.
MSDS
N/A
Precious Metals
--
Enviromental
N/A
Electrostatic ESD & EMI
No ESD or EMI sensitivity

Major End Users Countries and entities

  • - Department of The Air Force 

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Nothing similar to this part number was found in our inventory

91251A426 / Screw,cap,socket headWhat is the formal definition of this item?

An externally threaded fastener whose threaded portion is of one nominal diameter. the head has an internal socket or multiple spline for use with an inserted driver. a locking feature may be incorporated in the design of the head or threads. excludes items with bevel (conical) heads. see bolt, internal wrenching. excludes screw, shoulder; and screw, machine.