Acquisition method (AMC)
1
FSC 4730 × NUT,TUBE COUPLING
NUT,TUBE COUPLING
4730-00-859-3521 FSC 4730
NSN 4730-00-859-3521 (also written 4730008593521; NIIN 00-859-3521) is a nut, tube coupling in Federal Supply Class 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. 6 manufacturer part numbers from 4 suppliers are on record. No purchases are on record yet.
Open for bid
No open solicitations on record for this NSN right now.
Can you win it?
This item is coded as suitable for competitive acquisition (AMC 1).
Suffix (AMSC)
T
Competition
Coded for competition
AMC 1: suitable for competitive acquisition, second or later time. AMSC T: handled under qualified products list procedures. The codes describe the item's status on record, not any one solicitation. What the codes mean
What it is — can you make it?
Dimensions, the FLIS specification requirements, and the manufacturer part numbers already qualified against this NSN.
Specifications
From the federal catalog (DLA FLIS / PUB LOG) — what your part has to meet. Cited specification documents can be looked up in ASSIST Quick Search ↗, DoD's public spec repository — copy the document number in.
| Requirement | Value |
|---|---|
| WIDTH ACROSS FLATS ASDB | INCHES NOMINAL 1.000 |
| NOMINAL TUBE OUTSIDE DIAMETER CQRJ | INCHES 0.625 |
| SEAT ANGLE CRRB | DEGREES NOMINAL 45.00 |
| MATERIAL MATT | OVERALL STEEL COMP 304 |
| NUT HEIGHT ADEA | INCHES NOMINAL 0.980 |
| THREAD CLASS AAJD | 3B |
| THREAD DIRECTION AAJF | RIGHT-HAND |
| NUT STYLE ACTA | — |
| SMALLEST INSIDE DIAMETER BSPX | INCHES NOMINAL 0.690 |
| THREAD SERIES BZRR | UNIFIED NATIONAL JOINT FINE (UNJF) |
| THREAD QUANTITY PER INCH CMLP | 14 |
| NOMINAL THREAD SIZE CQJX | INCHES 0.875 |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION STDC | OVERALL MIL SPEC SINGLE TREATMENT RESPONSE -IL-S-5002 |
| LENGTH TO SHOULDER BRQL | INCHES NOMINAL 0.687 |
| SPECIFICATION/STANDARD DATA ZZZK | GOVERNMENT STANDARD 96906--S21921 |
| MATERIAL DOCUMENT AND CLASSIFICATION MDCL | OVERALL FED SPEC SINGLE MATERIAL RESPONSE QQ-S-763 QQ-S-763 |
| SURFACE TREATMENT SFTT | OVERALL PASSIVATE |
Manufacturer part numbers
Commercial part numbers cross-referenced to this NSN in the federal catalog — the parts that have been accepted as satisfying this stock number, and who makes them.
| Part number | CAGE | Manufacturer |
|---|---|---|
| 4730PL1454784 | 9009H | JEDNOLITY INDEKS MATERIALOWY - UNIFORM MATERIAL INDEX |
| MS21921-10C | 96906 | MILITARY STANDARDS PROMULGATED BY MILITARY DEPARTMENTS UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M |
| MS21921-10J | 0U583 | SAE INTERNATIONAL DBA SAE INTERNATIONAL |
| MS21921-10J | 81343 | SOCIETY OF AUTOMOTIVE ENGINEERS INC |
| MS21921-10J | 96906 | MILITARY STANDARDS PROMULGATED BY MILITARY DEPARTMENTS UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M |
| SAE-AS18280 | 0U583 | SAE INTERNATIONAL DBA SAE INTERNATIONAL |
What it pays — so you can quote
The government's own price and demand record for this NSN — what past awards cleared at, so you know where to land your quote.
Latest unit price
—
Purchases
0
Total spend
—
—
Last purchased
—
Purchase records
—
Total demand
—
Latest award total
Purchase history
No priced purchases on record for this NSN yet.
Related contract actions
Contract action totals, not unit prices — obligation amounts from USAspending for related awards, shown for context only. These do not appear on the price chart above.
No related contract actions on record.
Demand history
Every solicitation we've indexed for this NSN, open and closed — 1 on record. Closed RFQs (expired, cancelled, or awarded) stay here as a record of past demand; they never get removed.
| Solicitation | Issued | Closes / closed | Qty | Status | |
|---|---|---|---|---|---|
| SPE7M3-26-T-9367 | Sep 25, 2026 | Oct 5, 2026 | 29 | Expired | View at DIBBS → |
Open RFQs on DIBBS → DIBBS award history ↗
About this data
- Unit prices: DLA DIBBS award records — every row links to its government record.
- AMSC: latest observed value from DIBBS solicitation history as of Oct 10, 2026.
- Contract action totals: USAspending, context only.
- Full methodology →
Cite this page
Citation
NSN Explorer. "NUT,TUBE COUPLING." nsnexplorer.com, https://nsnexplorer.com/nsn/4730-00-859-3521/. Data as of October 19, 2026.
Link
https://nsnexplorer.com/nsn/4730-00-859-3521/