4250-4-5-B

425045B Machine Screw

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Datasheet. 4250-4-5-B specification

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

2a

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.

0.450in. and 0.500in. ⁓1/2"

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.

0.500in. ⁓1/2"

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

watertight

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

0.205in. and 0.238in.

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

0.070in. and 0.080in. ⁓3/32"

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

cross recess type 1

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)

Features Provided
Those features,not otherwise specified,which may be required for proper functioning of the item.

sealing ring

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

40

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

steel comp 304 or steel comp 305 or steel comp 316 or steel comp 384 or steel comp XM-7

Screw 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 screw material.

MIL-S-82496 mil spec single material response

Head Surface Treatment
The metallic,nonmetallic,and/or chemical properties with which the head is plated,dipped and/or coated.the treatment is designed to protect the surface(s) and cannot be wiped off.

paint

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

black

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 quantity is this sold in?

1EA

What class is the thread series?

Unc

What is the thread quantity per inch?

40

What is the head style?

Watertight

What is the thread length?

0.450 inches minimum and 0.500 inches maximum

What is the thread direction?

Right-hand

What is the thread class?

2a

What is the NSN for 4250-4-5-B?

5305-01-491-9434

How is this classified for shipping?

Schedule B number: 7318152000
nmfc 133300
Bolts and bolts and their nuts or washers exported in the same shipment

What's the federal classification of 4250-4-5-B?

FSC 5305 ⁓ Screws

NSN 5305-01-491-9434 SCREW,MACHINE

unc thread series 40 thread quantity per inch watertight head style 0.450" thread length right-hand 2a thread class

NIIN
014919434
NIIN Date
11/07/01
Schedule B
7318152000 
Name Code
06657
FIIG
A500D0
QUP
Historical Price
$15.75 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 Navy 

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Shipping Information

Special Handling
Other or no special handling required (sh) 
LTL (less than a truck load rating)
Rating variable 
LCL (less than a car load rating)
Unknown
Special Cargo
No special type of cargo code applicable 
Air Freight (Minimum cargo door size required)
Shipment is not a consolidation and does not exceed 84 inches in any dimension. 
Customs Requirement Classification
Construction materials: includes paint and related materials, prefabricated building, wood products, metal and composition mater 
Commodity (for shipments via water)
Engineer and material handling equipment, test/tool sets and equipment 
NMFC (national motor freight code)
133300 MACHINERY/MACHINES NOI 
UFC (universal freight code)
63220 

Similar by Design Other screws with similar characteristics

Nothing similar to this part number was found in our inventory

4250-4-5-B / Screw,machineWhat is the formal definition of this item?

An externally threaded fastener whose threaded portion is of one nominal diameter, no 0 (0.060 in./1.5 mm) or larger, designed to be held or driven with either a wrench or an inserted driver or both (excluding internal socket or internal multiple spline types), in sizes below no. 10 (0.190 in./5 mm). no. 10 and larger sizes must have a head designed for any type inserted driver (excluding internal socket or internal multiple spline types), but may also be designed for external wrenching. a locking feature may be incorporated in the design of the head or threads. excludes bolt, clevis; bolt, externally relieved body; screw, externally relieved body; and screw, assembled washer. see also, screw, instrument; bolt, machine; bolt, internal wrenching; and screw, cap socket head.