2890609-1

28906091 Assembled Washer Screw
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Datasheet. 2890609-1 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.

1.361in. and 1.371in. ⁓1-3/8"

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.

1.511in. and 1.521in. ⁓1-17/32"

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

flat extended washer

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

0.620in. and 0.630in.

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

0.417in. and 0.427in. ⁓7/16"

Extended Washer Diameter

1.245in. and 1.255in.

Extended Washer Thickness

0.151in. and 0.161in.

Washer Quantity
The number of washers included on the item.

1

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

w/o internal drive

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

0.500in. ⁓1/2"

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

20

Primary Washer Outside Diameter

1.245in. and 1.255in.

Primary Washer Style
The style designation indicating the configuration that most nearly corresponds to the appearance of the primary washer.

flat

Primary Washer Material Thickness

0.151in. and 0.161in.

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.

2 holes in waser directly opposite each other 0.122-0.128 in. dia; top of head chamfered 15.0 deg x 0.380 in.

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

steel comp 630

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.

AMS5643 assn std 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.

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

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.

unf

Answers.

What class is the thread series?

Unf

What material is the assembled washer screw made of ?

Steel comp 630

What is the thread quantity per inch?

20

What is the head style?

Flat extended washer

What is the thread length?

1.361 inches minimum and 1.371 inches maximum

What is the thread direction?

Right-hand

What is the thread class?

3a

What is the NSN for 2890609-1?

5305-01-161-6941

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 2890609-1?

FSC 5305 ⁓ Screws

NSN 5305-01-161-6941 SCREW,ASSEMBLED WASHER

unf thread series passivate surface treated 2 holes in waser directly opposite each other 0.122-0.128 in. dia; top of head chamfered 15.0 deg x 0.380 in. 20 thread quantity per inch flat extended washer head style 1.361" thread length right-hand 3a thread class

NIIN
011616941
NIIN Date
09/09/83
Schedule B
7318152000 
Name Code
06660
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

Major End Users Countries and entities

  • - Netherlands 

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Similar by Design Other screws with similar characteristics

Nothing similar to this part number was found in our inventory

2890609-1 / Screw,assembled washerWhat is the formal definition of this item?

A screw, (as modified) to which has been assembled one or more nonremovable washer(s).