AS21916-4

AS219164 Boss Reducer

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Datasheet. AS21916-4 specification

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

3a all ends

Reducer Type
Refers to the location of the ends whether on the same centerline (concentric) or on different centerlines (eccentric).

concentric

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

atf aircraft, (AC-130A, AC-130H, MC-130H, EC-130E, hc

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

external seat for gasket seal (boss) all ends

Connection Type
Indicates the type of connection/s/.

threaded external boss all ends

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

12 1st end

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

1.312in. 1st end ⁓1/64"

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

0.438in. 2nd end ⁓2-1/64"

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

1.531in.

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

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-225/6, T6 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 mil 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.

unj 1st end

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 2nd end

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

96906-MS21916 government standard

Answers.

What quantity is this sold in?

1EA

What class is the thread series?

Unjf 2nd end

What class is the thread series?

Unj 1st end

What material is the boss reducer made of ?

Aluminum alloy 2024

What is the thread quantity per inch?

12 1st end

What is the thread class?

3a all ends

What is the NSN for AS21916-4?

4730-00-541-7002

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 AS21916-4?

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 4730-00-541-7002 REDUCER,BOSS

Used on atf aircraft, (ac-130a, ac-130h, mc-130h, ec-130e, hc. unjf 2nd end thread series anodize surface treated 12 1st end thread quantity per inch 3a all ends thread class

NIIN
005417002
NIIN Date
01/01/61
Schedule B
7609000000 
Name Code
23541
FIIG
A080B0
Item Weight
0.100lbs
Item Dimensions
--
QUP
Historical Price
$49.60 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. MS21916D16-4 Cage 96906
3. AS18280 Cage 81343
4. AS21916 Cage 81343
5. MS21916W16-4 Cage 81343
6. MS21916D16-4 Cage 96906

Major End Users Countries and entities

  • - Federal Aviation Administration 
  • - Department of The Navy 
  • - Department of The Army 
  • - Department of The Air Force 
  • - Poland 
  • - Brazil 
  • - Spain 
  • - Australia 
  • - Canada 
  • - France 
  • - Republic of Korea 
  • - United Kingdom 
  • - Italy 
  • - Denmark 
  • - Greece 

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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 reducers with similar characteristics

Nothing similar to this part number was found in our inventory

AS21916-4 / Reducer,bossWhat is the formal definition of this item?

A straight fitting having a boss connection of a different size at each end. both connections have external or internal machine threads (straight threads other than pipe or hose series) and are designed to facilitate a gasket, preformed packing, washer, or the like to form a seal at the boss. excludes bushing (as modified).