NSN catalog · 90,963 partsCatalog › Pipe, Tubing, Hose, and Fittings › FSC 4730 › 4730-00-289-2776
Boss Reducer P/N MS21916W5-4
In stock — 4 on our U.S. shelfNSN 4730-00-289-2776 4730002892776 NIIN 002892776
SECO Parts has 4 in stock of NSN 4730-00-289-2776 — Boss Reducer — on our own shelf in Augusta, GA: a stocking supplier, not a broker.
One part, one step — answered within one business day. Several parts? and send them together.
- Ships in 1–3 business days from Augusta, GA
- Certificate of Conformance on request
- PO, GPC & major cards
- $50 minimum order — smaller requests still get a quote
- 30-day returns · terms
- FLIS item name
- REDUCER,BOSS
- SECO description
- REDUCER, TUBE
- Federal supply class
- FSC 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
Availability & condition
| Condition | Code | Qty on shelf |
|---|---|---|
| New Surplus | NS | 4 |
| Total | 4 |
Quantities are live from SECO's inventory system, not estimated.
Also known as:
4730-00-289-2776 002892776 MS21916W5-4 SAE-AS18280 3110519 AS18280 AS21916 MS21916D5-4
Get a quote
Build a list across as many parts as you need, send it once, get one quote back — answered within one business day, usually the same day. POs and GPC welcome. $50 minimum order.
More to tell us? Need-by date, ship-to, your own RFQ document
Specifications
- Nominal overall length
- Inches 1.156
- Operating pressure
- Single Response Pounds Per Square Inch (PSI) Maximum 3000.0
- Material document and classification
- Overall Fed Spec Single Material Response QQ-A-225 to 6,T6
- Thread class
- 3A
- Reducer type
- Concentric
- Surface treatment document and classification
- Overall MIL Spec Single Treatment Response -IL-A-8625,Tye 2
- Thread series designator
- All Ends Unified National Joint Fine (Unjf)
- Material
- Overall Aluminum Alloy 2024
- Specification/standard data
- Government Standard 96906--S21916
- Media for which designed
- Single Response Aeronautical Fluid
- Maximum operating temp
- Single Response Celsius 135.0
- Connection type
- All Ends Threaded External Tube
- Nominal thread size
- First End Inches 0.500
- Surface treatment
- Overall Anodize
- Seat angle
- All Ends Degrees 12.0
- Nominal outside diameter tube accommodated
- First End Inches 0.312
- Nominal outside diameter tube accommodated
- Second End Inches 0.250
- Nominal thread size
- Second End Inches 0.438
From the federal catalog's item characteristics for this NSN. Confirm critical dimensions against your part or drawing before ordering.
Cross-reference part numbers
MS21916W5-4 SAE-AS18280 3110519 AS18280 AS21916 MS21916D5-4
Shown for identification only. SECO can quote against any of these numbers.
Logistics data
| Source of supply | SMS DLA Land and Maritime, Columbus, Ohio |
| Acquisition advice code | Z Insurance/numeric stockage objective — held by the government as insurance stock for contingencies, not for routine issue. SECO has 4 on the shelf |
| Unit of issue | FV fv |
| Demilitarization code | A Demilitarization not required — non-munitions-list item |
| Controlled inventory code | U Unclassified |
| Hazardous material indicator | N No hazardous material |
Source: public FLIS/PUB LOG cataloging data.
Why buy from SECO
These quantities sit on our own shelves — we are a stocking supplier, not a broker sourcing after you order. Condition-coded stock, formal quotes with NSN/PN on the paperwork, POs and GPC welcome, fast U.S. shipping.
In business since 1951 · 30,000+ contracts completed · about SECO & our policies · more questions answered
FAQ
What is NSN 4730-00-289-2776?
NSN 4730-00-289-2776 (4730002892776) — Boss Reducer: SECO Parts has 4 in stock in Augusta, GA, on our own shelf. It is the NATO Stock Number for boss reducer in federal supply class 4730 (Hose, Pipe, Tube, Lubrication, and Railing Fittings).
Is NSN 4730-00-289-2776 available?
SECO Parts has 4 in stock in Augusta, GA — order or request a quote below.
How much does NSN 4730-00-289-2776 cost?
SECO quotes NSN 4730-00-289-2776 on request, usually the same business day.
What part numbers cross-reference to NSN 4730-00-289-2776?
Part numbers that cross-reference this NSN include MS21916W5-4, SAE-AS18280, 3110519, AS18280, AS21916, MS21916D5-4. SECO can quote against any of them.
Same item, other stock numbers
Other NSNs the federal catalog names REDUCER,BOSS. Same name is not the same part: check the part numbers.