81839

81839 Boss Coupling

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Datasheet. 81839 specification

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

3a 2nd end

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

3b 1st end

Connection Style
The style designation indicating the configuration that most nearly corresponds to the appearance of the connection.

external seat for gasket seal (boss) 2nd end

Connection Style
The style designation indicating the configuration that most nearly corresponds to the appearance of the connection.

gasket seal (boss) 1st end

Connection Type
Indicates the type of connection/s/.

threaded external boss 2nd end

Connection Type
Indicates the type of connection/s/.

threaded internal boss 1st end

Nominal Thread Size
A designation that is used for the purpose of general identification of the thread.

0.750in. all ends ⁓3/4"

Nominal Overall Length
The nominal dimension measured along the longitudinal axis with terminated points at the extreme ends of the item.

1.380in.

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.

female end 1.000 in. od hex

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

aluminum alloy

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.

QQ-A-268, cond t fed spec single material response

Media For Which Designed
The type of media for which the item is designed.

fluid single 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.

anodize

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.

MIL-A-8625, type 1 mil spec single treatment response

Style Designator
The style designation indicating the configuration that most nearly corresponds to the appearance of the item.

rigid, threaded internal and external

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 all ends

Answers.

What quantity is this sold in?

1EA

What class is the thread series?

Unf all ends

What is the style?

Rigid, threaded internal and external

What material is the boss coupling made of ?

Aluminum alloy

What is the thread class?

3b 1st end

What is the thread class?

3a 2nd end

What is the NSN for 81839?

4730-00-925-4727

How is this classified for shipping?

Schedule B number: 7609000000
nmfc 051400
Aluminum tube or pipe fittings (couplings,elbows sleeves)

What's the federal classification of 81839?

FSC 4730 ⁓ Hose, pipe, tube, lubrication, and railing fittings

Excluding air conditioning-heating fittings (fsc 4520); bituminized fiber and concrete fittings (fsc 5630); conduit boxes and fittings (fsc 5975); downspout fittings (fsc 5670); medical and surgical fittings (fsc 6515); laboratory fittings (fsc 6640); post caps and rail ends (fsc 5660); machine thread bushings and plugs (fsc 5365).

NSN 4730-00-925-4727 COUPLING,BOSS

unf all ends thread series rigid, threaded internal anodize surface treated female end 1.000 in. od hex 3b 1st end thread class

NIIN
009254727
NIIN Date
01/20/66
Schedule B
7609000000 
Name Code
26953
FIIG
A080B0
Item Weight
0.100lbs
Item Dimensions
--
QUP
Historical Price
$1,078.20 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

Major End Users Countries and entities

  • - Department of The Navy 
  • - Department of The Air Force 

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Shipping Information

Special Handling
Other or no special handling required (sh) 
LTL (less than a truck load rating)
77.5 
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)
Metal and metal products, nos, (less than 35 feet) 
NMFC (national motor freight code)
051400 PIPE FITTINGS ALUMINUM 
UFC (universal freight code)
29700 

Similar by Design Other couplings with similar characteristics

Nothing similar to this part number was found in our inventory

81839 / Coupling,bossWhat is the formal definition of this item?

A straight one-piece fitting 12 inches (304 mm) long or under having the same size fitting on each end (straight machine threads other than pipe or hose series). it may have internal threads on both ends or internal threads on one end and external threads on the other designed to facilitate a gasket, preformed packing, washer, or the like, to form a seal at the boss. it is designed to join two bosses or boss fittings. excludes items having external threaded connections on both ends.