AS21921

AS21921 Tube Coupling Nut

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Datasheet. AS21921 specification

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

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

Fabrication Method
The process used in manufacturing the item.

any acceptable

Nut Style
The style designation indicating the configuration that most nearly corresponds to the appearance of the nut.

tube coupling

Nut Height

0.710in. and 0.730in. ⁓47/64"

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

aircraft application, iroquis UH-1, chinook CH-47 helicopter, delta dart F-106, F-111. tomcat F-14A, starlifter C-141 aircraft, E-3A aircraft warning and control system (awacs)

Width Across Flats
The shortest straight line between flats,perpendicular to the height.

0.562in. ⁓9/16"

Length To Shoulder

0.537in. and 0.557in.

Smallest Inside Diameter
The smallest length of a straight line which passes through the center of the two surfaces of a circular item,and terminates at the inside circumference.

0.300in. and 0.305in.

Thread Series
A designation indicating the diameter-pitch combination and the number of threads per measurement scale applied to a series of diameters.

unjf

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

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

0.438in. ⁓29/64"

Nominal Tube Outside Diameter
The nominal length of a straight line which passes through the center of a tube,and terminates at the outside circumference.

0.250in.

Seat Angle

45.00 degrees

Criticality Code Justification
The master requirement codes of those requirements which are technically critical by reason of tolerance,fit,performance,or other characteristics which affect identification of the item.

feat

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.

grumman aerospace corp A10 aircraft; weapon system essential

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

aluminum alloy 2014 or aluminum alloy 2024

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-367, T6 fed spec single material response or QQ-A-225/6, T6, T62 or T851 fed spec 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.

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 2, class 1 mil spec single treatment response

Specification/standard Data
The document designator of the specification or standard which established the item of supply.

96906-MS21921 government standard

Answers.

What material is the tube coupling nut made of ?

Aluminum alloy 2014 or aluminum alloy 2024

What is the thread quantity per inch?

What is the thread direction?

Right-hand

What is the thread class?

What is the NSN for AS21921?

4730-00-555-8203

How is this classified for shipping?

Schedule B number: 7609000000
nmfc 013540
Aluminum tube or pipe fittings (couplings,elbows sleeves)

What's the federal classification of AS21921?

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 4730-00-555-8203 NUT,TUBE COUPLING

Used on aircraft application,iroquis uh-1,chinook ch-47 helicopter,delta dart f-106,f-111. tomcat f-14a,starlifter c-141 aircraft,e-3a aircraft warning and control system (awacs). anodize surface treated grumman aerospace corp A10 aircraft; weapon system essential 20 thread quantity per inch right-hand 3b thread class

NIIN: 005558203
NIIN Date: 01/01/61
Schedule B: 7609000000
Name Code: 03859
FIIG: A021A0
Item Weight: 0.100lbs
Item Dimensions: 40 X 40 X 20
QUP
Historical Price: $1.15 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.	AS18280	Cage 81343
2.	CVC4257W4	Cage 80378
3.	2652291W4	Cage 92003
4.	VSF1212-4WW	Cage 92215
5.	118-21600-230-4	Cage 79470
6.	MS21921-4D	Cage 81343
7.	AS21921-4D	Cage 81343
8.	202-21600W4	Cage 80378
9.	156/15	Cage K7018
10.	ER817-4D	Cage 81755
11.	DV600W4	Cage 17491
12.	MS21921D4	Cage 96906
13.	VSF1212-4WW	Cage C4293
14.	118-21600-230-4	Cage 14798
15.	137618257	Cage A0199

Major End Users Countries and entities

- National Aeronautics And Space Administration
- Department of The Navy
- Department of The Army
- U.s. Marine Corps
- Department of The Air Force
- Poland
- Brazil
- Spain
- Israel
- Taiwan, Province of China
- Singapore
- Kuwait
- Saudi Arabia
- Malaysia
- Thailand
- Australia
- Belgium
- Canada
- New Zealand
- France
- Germany
- Republic of Korea
- United Kingdom
- Netherlands
- Portugal
- Italy
- Denmark
- Norway
- Greece
- Turkey
- Nato Maintenance And Supply Agency

Major End Items End use applications

- Support equipment, b-52 aircraft
- Aircraft, sof ( ac-130h, mc-130h, ec-130e, hc-130)
- Helicopter, mh-53e
- Los angeles class ssn (688)
- Seawolf class ssn
- Fms - knox class ff
- Ah-64-d longbow
- Hh-60l medivac
- U-2 airframe
- Virginia class submarine, ssn-774
- Oh 58d ahip (army helicopter improvement program) helicopter
- Helicopter,attack
- Helicopter,attack
- Helicopter,attack
- Helicopter,attack
- Helicopter,attack
- Helicopter,attack
- Helicopter,attack
- Helicopter,attack
- Helicopter,attack
- Helicopter,attack
- Helicopter,attack
- Helicopter,attack
- Helicopter,attack
- Helicopter,attack
- Helicopter,attack
- Helicopter,attack
- Helicopter,attack
- Helicopter,attack
- Helicopter,attack
- Helicopter,attack
- Helicopter,attack
- Helicopter,attack
- Helicopter,attack
- Helicopter,attack
- Helicopter,attack
- Helicopter,attack
- Helicopter,attack
- Helicopter,attack
- Helicopter,attack
- Helicopter,attack
- Helicopter,attack
- Helicopter,attack
- Helicopter,attack
- Helicopter,attack
- Helicopter,attack
- Helicopter,attack
- Helicopter,attack
- Helicopter,attack
- Helicopter,attack
- Helicopter,attack
- Cylinder assembly,actuating,linear
- Helicopter,attack
- Helicopter,attack
- Helicopter,attack
- Helicopter,attack
- Helicopter,attack
- Helicopter,attack
- Helicopter,attack
- Helicopter,attack
- Helicopter,attack
- Helicopter,attack
- Helicopter,attack
- Helicopter,attack
- Helicopter,attack
- Helicopter,attack
- Helicopter,attack
- Helicopter,attack
- Helicopter,attack
- Helicopter,attack
- Helicopter,attack
- Helicopter,attack
- Helicopter,attack
- Helicopter,attack
- Helicopter,attack
- Helicopter,attack
- Helicopter,attack
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- Helicopter,attack
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- Helicopter,attack
- Helicopter,attack
- Helicopter,attack
- Helicopter,attack
- Helicopter,attack
- Helicopter,attack
- Helicopter,attack
- Helicopter,attack
- Helicopter,attack
- Helicopter,attack
- Helicopter,attack
- Helicopter,attack
- Helicopter,attack
- Helicopter,attack
- Cylinder assembly,actuating,linear
- Control,pneumatic s
- Helicopter,attack
- Helicopter,attack

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Shipping Information

Special Handling: Other or no special handling required (sh)
LTL (less than a truck load rating): 70.0
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): 013540 ALUM NUTS
UFC (universal freight code): 05680

Similar by Design Other nuts with similar characteristics

Nothing similar to this part number was found in our inventory

AS21921 / Nut,tube couplingWhat is the formal definition of this item?

An internally threaded nut which has either an internal seat or shoulder and/or is designed to be used with a ferrule, to mate with the seat of an externally threaded tube fitting to form a leakproof connection. excludes nut (1), tube coupling, reducing; and nut (1), union.