2-56UNC2A1/4LG ANSIB18.6.3FLATHD

256UNC2A14LGANSIB1863FLATHD Machine Screw

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Datasheet. 2-56UNC2A1/4LG ANSIB18.6.3FLATHD 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.

0.199in. ⁓13/64"

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.

0.250in. ⁓1/4"

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

flat countersunk

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

0.156in. and 0.172in.

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

cross recess type ii

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

0.086in. (UTS #2)

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

56

Countersink Angle
The included angle of the countersink.

80.0 degrees and 82.0 degrees

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

steel comp 301 or steel comp 430

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.

IFI-104 assn std all material responses

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

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.

ARINC-King pt list 006-8024-05, similar to nsn 5305-00-727-8833

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.

22373-089-5432 manufacturers specification control and 80204-ansi B18.6.3 professional/industrial association standard

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.

1 table and 2-56 size and 1/4in. length and stls/stl material

Departure From Cited Document
The technical differentiating characteristic/s/ of an item of supply which depart/s/ from the text of a specification or a standard in that it represents a selection of characteristics stated in the specification or standard as being optional,or a variation from one or more of the stated characteristics,or an additional characteristic not stated in the specification or standard.

as modified by material

Answers.

What class is the thread series?

Unc

What type of screw surface treatment?

Passivate

What is the thread quantity per inch?

56

What is the head style?

Flat countersunk

What is the thread length?

0.199 inches

What is the thread direction?

Right-hand

What is the thread class?

2a

What is the NSN for 2-56UNC2A1/4LG ANSIB18.6.3FLATHD?

5305-00-716-7308

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 2-56UNC2A1/4LG ANSIB18.6.3FLATHD?

FSC 5305 ⁓ Screws

NSN 5305-00-716-7308 SCREW,MACHINE

unc thread series passivate screw surface treated 56 thread quantity per inch flat countersunk head style 0.199" thread length right-hand 2a thread class

NIIN
007167308
NIIN Date
07/02/71
Schedule B
7318152000 
Name Code
06657
FIIG
A500D0
QUP
 
Historical Price
$0.38 EA
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. 089K-5432-04 Cage K0668
2. 089-5432-04 Cage 22373

Major End Users Countries and entities

  • - Brazil 
  • - Singapore 
  • - Australia 

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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

2-56UNC2A1/4LG ANSIB18.6.3FLATHD / 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.