2743999-1

27439991 Setscrew
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Datasheet. 2743999-1 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.

0.700in. and 0.710in. ⁓23/32"

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.

2.490in. and 2.510in. ⁓2-33/64"

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

headless (setscrew)

Hole Diameter
The length of a straight line which passes through the center of a hole,and terminates at the circumference.

0.040in. and 0.050in. ⁓1/16"

Point Length
A measurement of the longest dimension of the point,in distinction from width.

1.780in. and 1.810in.

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

0.079in. and 0.081in.

Point Style
The style designation indicating the configuration that most nearly corresponds to the appearance of the point.

chamfer dog

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

slot

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

0.250in. ⁓1/4"

Hole Quantity
The number of holes provided.

1

Hole Type
Indicates the type of hole(s) provided in the item.

drilled

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

20

Point Chamfer Angle

40.0 degrees and 50.0 degrees

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

steel comp 4130

Material Document And Classification
The specification,standard,or manufacturers reference,and the classification designation,such as class,condition,temper,and the like,that identifies the material.

MIL-2-6758, comp 4130 mil spec single material response

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 and chromate

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 fed spec single treatment response

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 material is the setscrew made of ?

Steel comp 4130

What is the thread quantity per inch?

20

What is the inside hole diameter?

0.040 inches minimum and 0.050 inches maximum

What is the head style?

Headless (setscrew)

What is the thread length?

0.700 inches minimum and 0.710 inches maximum

What is the thread direction?

Right-hand

What is the thread class?

3a

What is the NSN for 2743999-1?

5305-01-398-4022

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 2743999-1?

FSC 5305 ⁓ Screws

NSN 5305-01-398-4022 SETSCREW

unc thread series cadmium surface treated 20 thread quantity per inch 0.040" hole diameter headless (setscrew) head style 0.700" thread length right-hand 3a thread class

NIIN
013984022
NIIN Date
11/02/94
Schedule B
7318152000 
Name Code
06672
FIIG
A003B0
QUP
 
Historical Price
$507.05 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 Air Force 

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Similar by Design Other setscrews with similar characteristics

Nothing similar to this part number was found in our inventory

2743999-1 / SetscrewWhat is the formal definition of this item?

An externally threaded device whose threaded portion is of one nominal diameter with or without a head and having a cup, cone, or other type of machined point designed to prevent or restrict relative movement of parts and designed to be driven with either a wrench or inserted driver. a locking feature may be incorporated in the design of the head or threads.