Boss Coupling

323747

323747
(NSN) National Stock Number
4730-00-115-2511
Federal Supply Classification
4730 Hose, Pipe, Tube, Lubrication and Railing Fittings
Item Name Code
26953
Schedule B Code
7307992000
Summary

2a 2nd end thread class, 2b 1st end thread class, external seat for gasket seal (boss) 2nd end connection style, gasket seal (boss) 1st end connection style, threaded external boss 2nd end connection type, threaded internal boss 1st end connection type

DAC HCC DMIL RNCC
1 - - 3
RNVC SADC MSDS RNAAC
2 - - AX
Identification

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.

INC FIIG Concept Condition
26953 A080B0 - 1
Specifications
Thread Class
2a 2nd end
Details A numeric-alpha designator indicating the pitch diameter tolerance and an external or internal thread.
Thread Class
2b 1st end
Details A numeric-alpha designator indicating the pitch diameter tolerance and an external or internal thread.
Connection Style
external seat for gasket seal (boss) 2nd end
Details The style designation indicating the configuration that most nearly corresponds to the appearance of the connection.
Connection Style
gasket seal (boss) 1st end
Details The style designation indicating the configuration that most nearly corresponds to the appearance of the connection.
Connection Type
threaded external boss 2nd end
Details Indicates the type of connection/s/.
Connection Type
threaded internal boss 1st end
Details Indicates the type of connection/s/.
Thread Quantity Per Inch
20 all ends
Details The number of threads on the item per linear inch measured on a line parallel to the thread axis.
Nominal Thread Size
1.750 inches all ends
Details A designation that is used for the purpose of general identification of the thread.
Nominal Overall Length
9.500 inches
Details The nominal dimension measured along the longitudinal axis with terminated points at the extreme ends of the item.
Material
steel overall
Details The chemical compound or mechanical mixture properties of which the item is fabricated.
Surface Treatment
zinc overall
Details 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.
Style Designator
plain
Details The style designation indicating the configuration that most nearly corresponds to the appearance of the item.
Thread Series Designator
uns all ends
Details A designation distinguishing one group of thread diameter-pitch combinations from another by the number of threads per measurement scale for a specific diameter.
Material and Special Handling
Hazardous material, precious metals, criticality, and electrostatic discharge indicators.
HMIC PMIC ESD/EMI Criticality
N U - -
Freight
Universal / National Freight and Handling Information
UFC HMC LTL LCL
92670 - W -
RVC WCC TCC SHC
- 671 Z 9

Certified Supplier

Order with confidence. We are a valued certified supplier serving customers in the military and aerospace industries.

  • Genuine Manufacturers Parts
  • 100% Product Inspection
  • 7 Year Sales Record Retention
  • Fast On-Time Delivery
  • HAZMAT Certified
  • Global Shipping
Manufacturer
STEWART-WARNER CORPORATION
CAGE: 57733
STAMFORD , CT , 06902-6987
UNITED STATES
View Products
FAQs
Frequently asked questions for NSN 4730-00-115-2511
What is the NIIN of the NSN 4730-00-115-2511?
The National Item Identification Number (NIIN) of the NSN 4730-00-115-2511 is 00-115-2511
When the NSN 4730-00-115-2511 was assigned to the Federal Catalog?
It was assigned 56 years ago, on Mon, Sep 16, 1968
Does the NSN 4730-00-115-2511 contain any precious metals?
Type/content is unknown
Does the NSN 4730-00-115-2511 contain any hazardous material?
No data in HMIRS

Can't Find It

If you didn't find what you need, don't worry, we're here to help! Our team is ready to help you find exactly what you need. Click below to contact us.

Who we are?

We are a trusted provider of milspec and aerospace hardware, offering high-quality consumables and parts. With a commitment to excellence, we guarantee reliable and fast delivery through our network of logistics centers. Our mission is to support the aerospace industry with precision and efficiency.

Contact
3555 Agricultural Center Dr.
St. Augustine, FL, 32092
United States
© 2025 Aerospace Hardware Store, Inc. All rights reserved.
Made in USA