NAS1790-3R19D

NAS17903R19D Close Tolerance Screw

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Datasheet. NAS1790-3R19D 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.

0.338in. ⁓11/32"

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.

1.526in. ⁓1-17/32"

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

flat countersunk

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

0.339in. and 0.381in.

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

0.189 in.

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

offset cruciform (torque set)

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

nimrod MRA4; nimrod 2000; air reconnaissance

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

0.190in. (UTS #10)

Grip Length
A measurement of the longest dimension of the grip,in distinction from width.

1.188 in.

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

32

Minimum Tensile Strength
The maximum rated load in tension applied in a longitudinal direction,per unit of cross-sectional area,that the material can withstand without rupture.

160000 pounds per square inch

Countersink Angle
The included angle of the countersink.

99.0 degrees and 101.0 degrees

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.

bolt, 100 degree flush head, 160, 000 psi uts

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.

threads have drilled hole, 0.070 - 0.080 inch in dia.

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

steel comp 4140 or steel comp 4340 or steel comp 8740

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-S-5626, uns G41400 mil spec single material response or AMS6415, E4340 (uns G43406) assn std single material response or MIL-S-5000, UNSG43406 mil spec single material response or MIL-S-6049, uns G87400 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

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.

unjf

Answers.

What class is the thread series?

Unjf

What material is the close tolerance screw made of ?

Steel comp 4140 or steel comp 4340 or steel comp 8740

What is the thread quantity per inch?

32

What is the grip length?

1.188 inches

What is the head style?

Flat countersunk

What is the thread length?

0.338 inches

What is the thread direction?

Right-hand

What is the thread class?

3a

What is the NSN for NAS1790-3R19D?

5305-01-576-3692

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 NAS1790-3R19D?

FSC 5305 ⁓ Screws

NSN 5305-01-576-3692 SCREW,CLOSE TOLERANCE

Used on nimrod mra4; nimrod 2000; air reconnaissance. unjf thread series cadmium surface treated threads have drilled hole, 0.070 - 0.080 inch in dia. bolt, 100 degree flush head, 160, 000 psi uts 32 thread quantity per inch 1.188 " grip length flat countersunk head style 0.338" thread length right-hand 3a thread class

NIIN
015763692
NIIN Date
07/29/09
Schedule B
7318152000 
Name Code
29294
FIIG
A003B0
DEMIL / ITAR
Uncontrolled item (Code A)
Hazmat
No hazard information available from HMIRS.
MSDS
N/A
Precious Metals
--
Enviromental
N/A
Electrostatic ESD & EMI
No ESD or EMI sensitivity

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NAS1790-3R19D / Screw,close toleranceWhat is the formal definition of this item?

A screw, machine or screw, cap, socket head whose unthreaded portion is of specified grip length, plated or unplated, and is machined to a tolerance of one thousandth (0.001 in.) (0.025 mm) or less of a specific diameter for items (1.000 in.) (25 mm) or less in diameter. items over (1.000 in.) (25 mm) in diameter shall have a tolerance of fifteen ten thousandths (0.0015 in.) (0.038 mm) or less. the nominal major diameter of the threads shall be at least one thousandth (0.001 in.) (0.025 mm) below the minimum shank diameter, but not below the minimum major diameter for applicable class of fit, as shown in the screw thread standards, fed std h28 and/or other nationally recognized standards. the head is designed to be held or driven with an inserted driver. it is not designed for rotation by the thumb and fingers. a locking feature may be incorporated in the design of the head or threads.