4-40UNC-3AX0.312CRES

440UNC3AX0312CRES Cap Socket Head Screw

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Datasheet. 4-40UNC-3AX0.312CRES 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.

0.312in. ⁓5/16"

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

knurled no. 1

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

0.176in. and 0.183in.

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

0.108in. and 0.112in. ⁓1/8"

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

hexagon

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

0.112in. (UTS #4)

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

0.094in. and 0.095in. ⁓7/64"

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

40

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.

80000 pounds per square inch

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

39.0 rockwell c and 45.0 rockwell c

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

steel comp 302 or steel comp 304 or steel comp 305 or steel comp 316 or steel comp 384

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.

66 fed std all material responses

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

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-35 fed spec single treatment response

Supplementary Features
Characteristics or qualities of an item,not covered in any other requirement,which are considered essential information for one or more functions excluding nsn assignment.

fscm 80204-ansi B18.3 table 3 size 4

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

Specification/standard Data
The document designator of the specification or standard which established the item of supply.

81348-FF-S-86 government specification

Nondefinitive Spec/std Data
The number,letter,or symbol that indicates the type,style,grade,class,and the like,of an item in a nonidentifying specification or standard.

6 type and 4-40 size and 5/16in. length and 3assjseunc class

Answers.

What class is the thread series?

Unc

What material is the cap socket head screw made of ?

Steel comp 302 or steel comp 304 or steel comp 305 or steel comp 316 or steel comp 384

What is the thread quantity per inch?

40

What is the head style?

Knurled no. 1

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 4-40UNC-3AX0.312CRES?

5305-01-219-9605

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 4-40UNC-3AX0.312CRES?

FSC 5305 ⁓ Screws

NSN 5305-01-219-9605 SCREW,CAP,SOCKET HEAD

unc thread series passivate surface treated 40 thread quantity per inch knurled no. 1 head style 0.312" thread length right-hand 3a thread class

NIIN
012199605
NIIN Date
11/05/85
Schedule B
7318152000 
Name Code
16282
FIIG
A003B0
DEMIL / ITAR
Uncontrolled item (Code A)
Hazmat
No hazard information available from HMIRS.
MSDS
N/A
Precious Metals
Metal content unknown
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. FF-S-86 Cage 81348
2. 0.112-40-3AX0.312 HEXSOCKET CRES Cage 70318
3. 4-40-3A X 5/16 HEX S0CKETHD CRES Cage 70318

Major End Users Countries and entities

  • - Brazil 

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Similar by Design Other screws with similar characteristics

Nothing similar to this part number was found in our inventory

4-40UNC-3AX0.312CRES / 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.