MS21916J6-4
Military Standard Boss Reducer
3/8" to 1/4", reducer, external thread, flareless, corrosion resistant steel, ms21916 series fitting







Add to Quote
MS21916J6-4 Datasheet Features and Specification
Quick Specs
Thread Series | UNJF |
Thread Class | 3A |
Additional Information
SKU / Model: | MS21916J64 |
NSN: | 4730-00-720-0233 |
FSC: | Hose, Pipe, Tube, Lubrication, and Railing Fittings / 4730 |
Product Series: | MS21916J |
Pack Weight (Approx.) | 0.000 lb |
Minimum Qty (MOQ): | 1 |
Schedule B: | 7307.21.5000 |
ECCN: | EAR99 |
National Motor Freight: | 052190, Pipe,tubing,or Pipe Or Tubing Fitti |
Download PDF Version MS21916J6-4_Military-Fasteners-com.pdf |
|
![]() |
* report an issue on this page
Frequently bought together
Other customers frequently bought these along with MS21916J6-4

MS21902J4
Boss Nipple
in Fittings
tube outside diameter: 1/4", corrosion resistant steel, union, flareless tube, MS21902 series fitting

MS21914-4J
Tube Cap
in Fittings
tube outside diameter: 1/4", corrosion resistant steel, pressure seal, flareless tube, MS21914 series fitting

MS21913J3
Threaded Tube Fitting Plug
in Fittings
outside diameter: 3/16", hex head, flareless tube, corrosion resistant steel

MS21913J5
Tube Fitting Threaded Plug
in Fittings
diameter: 5/16", hex head, flareless, corrosion resistant steel, MS21913 series plug

MS21913J6
Threaded Tube Fitting Plug
in Fittings
outside diameter: 3/8", corrosion resistant steel, hex head, flareless tube, MS21913 series fitting

MS21913J4
Threaded Tube Fitting Plug
in Fittings
tube outside diameter: 1/4", corrosion resistant steel (304), hex head, flareless tube, MS21913 series fitting
More MS21916J boss reducers
$66.00 Ea
$59.94 Ea
4730-00-851-8466 Boss Reducer
4730-00-826-3421 Boss Reducer
Product Image Gallery
Product code MS21916J6-4






Have a question
If you require a quote on this or any product please visit our quote request page »
Browse our frequently asked questions page.
You may contact us by phone at +1 (904) 543-6395 or
email us using our contact form.
Our hours of operation are 8:00am - 6:00pm EST
Customer Reviews

I am unable to add any suggestions. Military Fasteners is an on time provider. I have never understood why the orders from you company are shipped and arrive in time given to me. Other companies say same day ship or the following day and it takes much much longer for the product to arrive. All I say, Good Job
At every point, Dania McLean's help was crucial and showed a great dedication to the business. She handled my questions with amazing skill right away, making sure every one of them received a comprehensive and perceptive answer. Her unwavering professionalism and contagious optimism, which made every interaction enjoyable, were what really stood out.
My company works directly with Military Fasteners, and we have had nothing but positive experiences. Trisha Hawkins, in particular, has been our primary contact. She always responds quickly and works to make sure the order is correct and shipped on time. Military Fasteners is a trusted vendor of ours and we look forward to working with them again in the future!
Products are military grade MIL-SPEC as advertised. I was able to locate #10 locking counter-sunk nutplates when ALL other locations, including Aircraft-Spruce, could not supply.
Please complete this form if you're having an issue with ordering this item or this item displays invalid or innacurate information or specifications. We thank you for taking the time to report issues so that we may better serve you.