3M938-3-9-5

3M938395 Close Tolerance Screw

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Datasheet. 3M938-3-9-5 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.

0.312in. ⁓5/16"

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.

0.874in. ⁓7/8"

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

oval countersunk undercut

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

0.2966in. and 0.3016in.

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

0.056in. and 0.060in. ⁓1/16"

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

0.1885in. and 0.1895in.

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

0.070in. and 0.075in.

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

HIGH-Torque

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.

0.1900in. (UTS #10)

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

0.562in.

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

32

Countersink Angle
The included angle of the countersink.

99.0 degrees and 101.0 degrees

Distance From Head Largest Bearing Surface To Shank Hole Center
The distance from the shank hole centerline to the largest bearing surface of the head.

0.753in. and 0.763in.

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.

screw, MACHINE-100 deg c'sunk, HI-Torque, reduced head

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

steel comp XM-13

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.

ams 5629 fed 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.

aluminum

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.

MIL-C-83488, type ii, class 3 mil 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.

unjf

Answers.

What class is the thread series?

Unjf

What material is the close tolerance screw made of ?

Steel comp xm-13

What is the thread quantity per inch?

32

What is the grip length?

0.562 inches

What is the head style?

Oval countersunk undercut

What is the thread length?

0.312 inches

What is the thread direction?

Right-hand

What is the thread class?

3a

What is the NSN for 3M938-3-9-5?

5305-01-626-8199

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 3M938-3-9-5?

FSC 5305 ⁓ Screws

NSN 5305-01-626-8199 SCREW,CLOSE TOLERANCE

Used on F-15SA. unjf thread series aluminum surface treated screw, machine-100 deg c'sunk, hi-torque, reduced head 32 thread quantity per inch 0.562" grip length oval countersunk undercut head style 0.312" thread length right-hand 3a thread class

NIIN
016268199
NIIN Date
03/20/14
Schedule B
7318152000 
Name Code
29294
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

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

1. HT4072-3-9-5 Cage 06950
2. HT4072-3-9-5 Cage 73197
3. HT4072-3-9-5 Cage 80539
4. HT4072-3-9-5 Cage 92215

Major End Users Countries and entities

  • - Department of The Air Force 

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Similar by Design Other screws with similar characteristics

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3M938-3-9-5 / 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.