2557242

2557242 Machine Screw
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Datasheet. 2557242 specification

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.

0.395in. and 0.425in. ⁓7/16"

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.

0.485in. and 0.515in. ⁓33/64"

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

spade

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

0.365in. and 0.395in. ⁓13/32"

Head Length
A measurement of the longest dimension of a head,in distinction from width.

0.365in. and 0.395in.

Width Between Flats

0.175in. and 0.205in.

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

w/o internal drive

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

F-18

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)

Nonstandard Thread Pitch Diameter
The minimum and maximum pitch diameter limits of a nonstandard straight screw thread.

+0.1587/+0.1597in.

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

32

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

32.0 rockwell c and 38.0 rockwell c

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, retaining, cutoff valve seat

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

steel comp 630

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.

AMS5643 assn std single material response

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

passivate

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.

passivate

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

passivate

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

passivate

Bearing Surface Of Head 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 of the bearing surface of head.

QQ-P-35 fed spec 1st treatment response

Head 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 of the head.

QQ-P-35 fed spec 1st treatment response

Screw 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 of the screw.

QQ-P-35 fed spec 1st treatment response

Shank 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 of the shank.

QQ-P-35 fed spec 1st 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 type of screw surface treatment?

Passivate

What is the thread quantity per inch?

32

What is the head style?

Spade

What is the thread length?

0.395 inches minimum and 0.425 inches maximum

What is the thread direction?

Right-hand

What is the NSN for 2557242?

5305-01-430-2100

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 2557242?

FSC 5305 ⁓ Screws

NSN 5305-01-430-2100 SCREW,MACHINE

Used on F-18. unjf thread series passivate screw surface treated screw, retaining, cutoff valve seat 32 thread quantity per inch spade head style 0.395" thread length right-hand

NIIN
014302100
NIIN Date
04/24/96
Schedule B
7318152000 
Name Code
06657
FIIG
A500D0
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

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

Major End Users Countries and entities

  • - Spain 
  • - Australia 

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Similar by Design Other screws with similar characteristics

Nothing similar to this part number was found in our inventory

2557242 / 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.