Boss Nipple

NSN: 4730-00-541-1578 | Model: AS21900

A straight, one-piece fitting used to join two bosses or boss fittings. Both ends are the same size and have external machine threads (straignt threads other than pipe or hose series). It is designed to facilitate a gasket, preformed packing, washer, or the like to form a seal at the boss. The center section may be suitably shaped to accommodate a wrench.

NSN Properties and Flags

NATO Stock Number

4730-00-541-1578

DEMIL

Thread Class

3a all ends

Maximum Operating Temp

275.0 degrees fahrenheit single response

End Application

11f aircraft, galaxy c-5

Connection Style

Flared w/ gasket seal (boss) 1st end

Connection Type

Threaded external boss all ends

Maximum Operating Pressure

3000.0 pounds per square inch single response

Thread Size

0.562 inches all ends

Criticality Code Justification

Feat

Nominallength

1.281 inches

Special Features

Weapon system essential

Material

Steel comp 1137

Material Specification

Qq-a-637 federal specification single material response

Media For Which Designed

Fluid single response

Surface Treatment

Cadmium

Surface Treatment Specification

Qq-p-416, type 2, class 2 federal specification single treatment response

Style Designator

Flared and flareless w/ center wrenching facility

Thread Series Designator

Unjf all ends

Specification Data

96906-ms21900 government standard

Inventory Check

The last inventory check on this NSN was done on 05/17/2024. Due to rapid changes in inventory this may not be the current stock qty.

New Surplus: 196
New: 1161

Pricing and Availability

Send us a request for quote using the form below. Our team will contact you with an up to date pricing and availability quote ASAP.

Certified Quality Assurance

ISO 9001:2015 + AS9120B
Counterfeit Parts Prevention
100% Product Inspections
7 Year Record Retention
On Time Delivery
HAZMAT Certified
Worldwide Shipping

NSN 4730-00-541-1578 Datasheet

Supply Class (FSC):

Railing Fittings Lubrication Tube Pipe Hose

Cross Reference:

AS21900
MS21900-6
MS21900-6
MS21900-6
MS21900-6
2900T34P02
MS21900-6
MS21900-6
MS21900-6
MS21900-6
2900T34P02
MS21900-6
MS21900-6
MS21900-6
4730005411578
AS5238-6

Cage Codes:

Society Of Automotive Engineers Inc (CAGE 81343)
Aeroquip Llc. Eaton (CAGE 00624)
Globe Aerospace Inc (CAGE 03647)
Faber Enterprises, Inc. (CAGE 14397)
General Electric Company (CAGE 99207)
Hannifin Corporation Parker (CAGE 45681)
Parker Hannifin Corp (CAGE 50948)
Precision Form Rivet Inc (CAGE 14728)
Designed Metal Connections, Inc. (CAGE 14798)
General Electric Co (CAGE 24446)
Military Standards (CAGE 96906)
Dana Corp (CAGE 79470)
Satair A/s (CAGE R1120)
E.c.a Etablissement (CAGE SCY13)
Precision Aircraft Machining (CAGE 66774)

Replacements:

4730-00-541-1578 replaces 4730-00-603-0718
4730-00-541-1578 replaces 4730-00-910-7928
4730-00-541-1578 replaces 4730-00-952-3178

Schedule B & Trade:

Schedule B: 7307994000 (NAICS 332919)

Other fittings nesoi of alloy steel not stainless
SITC: 67959

Iron and steel tube and pipe fittings, n.E.S.
End Use: 12110

Iron and steel products, other

Identification:

HMIC

N - Indicates there is no data in the hmirs and the nsn is in a fsc not generally suspected of containing hazardous materials.

PMIC

U - Precious metal content is unknown

CRITL

- The item does not have a nuclear hardened feature but does have other critical featur (s) such as tolerance, fit restrictions or application.

Freight Information:

NMFC:

052190 - Pipe, tubing, or pipe or tubing fitti
WCC:

576 - Metal and metal products, nos, (less than 35 feet)
SHC:

9 - Other or no special handling required (sh)
ADC:

A - Shipment is not a consolidation and does not exceed 84 inches in any dimension.
ACC:

B - Construction materials: includes paint and related materials, prefabricated building, wood products, metal and composition mater
LTL:

W - Rating variable
TCC:

Z - No special type of cargo code applicable

NSN Management Codes:

SOS
Sms
AAC
Y
Quantity per pack
1
Unit of Measure
Ea
Shelf Life
N/A
Classification Control
U
MGMT_CTL
J2200x-
Repariability
This is a nonreparable item. if condemned or economically unserviceable, then dispose at the level authorized replace the item.

Questions & Answers:
What are the historical prices recorded for this stock number?
Historical data shows pricing from $50.14 to $83.57..
Does NSN 4730-00-541-1578 have a shelf life?
No. There is no shelf life applicable for this NSN.
What NATO entities are users of this NSN?
Austria, Poland, Spain, Israel, Kuwait, Morocco, Malaysia, Australia, Canada, New Zealand, France, Germany, Republic Of Korea, United Kingdom, Netherlands, Portugal, Denmark, Norway, Greece, and Turkey
What is the NIIN of NSN 4730-00-541-1578?
005411578 or 00-541-1578
Does NSN 4730-00-541-1578 require demilitarization?
Yes - ITAR Controlled
What is the most recent solicitation for NSN 4730-00-541-1578?
No solicitations for this NSN.
When was this national stock number assigned to the federal catalog?
Jan 01, 1961