Home · FSC 4730 Hose, Pipe, Tube, Lubrication, And Railing Fittings · NSN 4730-01-534-8659
NSN 4730-01-534-8659 — Reducer,Boss
NIIN 01-534-8659 · unit of issue EA · AAC D (stocked, centrally managed (dla)) · source of supply SMS
Buying rhythm
from 13 government buys since 2016
The government has bought this item about every 8 months (loose, gaps vary ±67%). Last buy Jun 29, 2026. The gaps are too uneven to put a window on the next one. 1 solicitation is open right now.
How well this works: for loose items, "next buy about one typical gap after the last, give or take 136 days" caught the actual next buy 37% of the time across 34,631 past buys, against 24% for a fixed "one year later" guess. A rhythm, not a schedule: DLA buys when stock and demand say so. Every item due for a buy now.
Used on: E-3 Sentry · all platforms
NSN 4730-01-534-8659 is the national stock number for a reducer,boss in federal supply class 4730 (Hose, Pipe, Tube, Lubrication, And Railing Fittings). It cross-references to 8 manufacturer part numbers from 4 CAGE codes, including Sae International, E.C.A Etablissement Central Des Approvisionnements Des Forces Armees Royales, Society Of Automotive Engineers Inc; the primary is 4730-541-4901. The federal catalog ties it to the E-3 Sentry. The unit of issue is EA and the FLIS list price is $26.48.
The U.S. government has bought this item 20 times on record, 3 of them in the last 24 months, most recently on June 29, 2026 at $43.10 each from S & B, Inc.. The median unit price paid over 36 months is $24.98. 1 solicitation is open right now, the soonest due October 5, 2026 for 41 EA. No seller has confirmed stock of it here in the last 60 days; watching the number is free and the first listing triggers an alert.
8
part numbers from 4 CAGEs
1
open solicitation, all agencies
3
government buys in 24 months · median $24.98
0
sellers with confirmed stock
Cross-references
Part numbers filed against this stock number, with the manufacturer (CAGE) and the FLIS reference codes.
| Part number | CAGE | Manufacturer | Reference | Variation |
|---|---|---|---|---|
| MS21916V6-4P | 0U583 | Sae International | 3 · Design control (vendor) | 2 · Fully interchangeable |
| SAE-AS18280 | 0U583 | Sae International | 3 · Design control (vendor) | 1 · Not fully interchangeable |
| 4730-541-4901 | A00AM | E.C.A Etablissement Central Des Approvisionnements Des Forces Armees Royales | 5 · Secondary reference | 9 · Reference only |
| 4730005414901 | A00AM | E.C.A Etablissement Central Des Approvisionnements Des Forces Armees Royales | 5 · Secondary reference | 9 · Reference only |
| AS18280 | 0U583 | Sae International | 5 · Secondary reference | 9 · Reference only |
| AS18280 | 81343 | Society Of Automotive Engineers Inc | 5 · Secondary reference | 9 · Reference only |
| AS21916 | 0U583 | Sae International | 5 · Secondary reference | 9 · Reference only |
| AS21916 | 81343 | Society Of Automotive Engineers Inc | 5 · Secondary reference | 9 · Reference only |
| MS21916V6-4P | 81343 | Society Of Automotive Engineers Inc | 5 · Secondary reference | 9 · Reference only |
| 4730015348659 | A00AM | E.C.A Etablissement Central Des Approvisionnements Des Forces Armees Royales | 6 | 9 · Reference only |
| 4730PL1727355 | 9009H | Jednolity Indeks Materialowy - Uniform Material Index | 6 | 9 · Reference only |
Government demand
Open DLA RFQs (DIBBS)
- SPE7M426T442D · 41 EA · due Oct 5, 2026 · N · AMSC T · DIBBS
What the government paid
| Date | Vendor | Qty | Unit cost | Amount | Buyer | Reference |
|---|---|---|---|---|---|---|
| Jun 29, 2026 | S & B, Inc. 0F4K9 | 445 | $43.10 | Dla | SPE7M226V4137 | |
| Nov 10, 2025 | Boeing Distribution Services, Inc. 2V484 | 726 | $24.98 | Dla | SPE7M426P0828 | |
| Apr 17, 2025 | Defense Support Services, Inc. 1L3U4 | 580 | $18.98 | Dla | SPE7M425P3793 | |
| Apr 13, 2023 | Boeing Distribution Services X, Inc. 2N935 | 646 | $12.12 | Dla | SPE7M123V5619 | |
| Nov 1, 2022 | Boeing Distribution Services X, Inc. 2N935 | 382 | $11.29 | Dla | SPE7M123V0926 | |
| Oct 27, 2021 | B. & E. Manufacturing Co., Inc. 59680 | 900 | $9.34 | Dla | SPE7M522P0069 | |
| Mar 30, 2020 | B. & E. Manufacturing Co., Inc. 59680 | 366 | $10.33 | Dla | SPE7M320P3325 | |
| Jan 29, 2019 | B. & E. Manufacturing Co., Inc. 59680 | 240 | $10.55 | Dla | SPE7M019V4082 | |
| Dec 14, 2018 | Boeing Distribution Services X, Inc. 2N935 | 1,089 | $10.95 | Dla | SPE7M319P1450 | |
| Jan 17, 2018 | B. & E. Manufacturing Co., Inc. 59680 | 415 | $10.99 | Dla | SPE7M418V2729 | |
| Apr 26, 2017 | B. & E. Manufacturing Co., Inc. 59680 | 124 | $11.30 | Dla | SPE7MC17V7520 | |
| Apr 10, 2017 | B. & E. Manufacturing Co., Inc. 59680 | 192 | $10.99 | Dla | SPE7M017V7457 | |
| Jan 1, 2017 | B. & E. Manufacturing Co., Inc. 59680 | 152 | $11.44 | Dla | SPM7MX12D00230806 | |
| Oct 23, 2016 | B. & E. Manufacturing Co., Inc. 59680 | 75 | $11.44 | Dla | SPM7MX12D00230750 | |
| Oct 10, 2016 | B. & E. Manufacturing Co., Inc. 59680 | 335 | $10.09 | Dla | SPM7MX12D00230740 | |
| Jul 10, 2016 | B. & E. Manufacturing Co., Inc. 59680 | 430 | $10.09 | Dla | SPM7MX12D00230694 | |
| May 1, 2016 | B. & E. Manufacturing Co., Inc. 59680 | 166 | $11.44 | Dla | SPM7MX12D00230639 | |
| Mar 27, 2016 | B. & E. Manufacturing Co., Inc. 59680 | 260 | $10.09 | Dla | SPM7MX12D00230606 | |
| Feb 8, 2016 | B. & E. Manufacturing Co., Inc. 59680 | 242 | $9.89 | Dla | SPM7MX12D00230576 | |
| Dec 18, 2008 | Faber Enterprises, Inc. Div Faber Enterprise Inc 14397 | 199 | $12.22 | Dla | SPM7M109MV513 |
Sources: DLA DIBBS procurement history (unit cost), DLA award history, FPDS (all agencies), SAM.gov notices. 20 buys on record in total.
Sellers with confirmed stock
No seller has confirmed stock on this NSN in the last 60 days. Watch it and we will email you when one does, or request a quote on 4730-541-4901.
Listings appear here only while the seller has confirmed them within 60 days. Sellers: list this part free.
DLA management data
- FLIS unit price
- $26.48
- Unit of issue
- EA
- Acquisition advice
- D — Stocked, centrally managed (DLA)
- Source of supply
- SMS
- Effective
- Oct 1, 2025
Item characteristics
- Thread Class
- 3A
- Reducer Type
- CONCENTRIC
- End Item Identification
- E-3A AIRCRAFT
- Connection Type
- ALL ENDS THREADED EXTERNAL BOSS
- Nominal Thread Size
- FIRST END INCHES 0.562
- Nominal Thread Size
- SECOND END INCHES 0.437
- Seat Angle
- ALL ENDS DEGREES 12.0
- Nominal Outside Diameter Tube Accommodated
- FIRST END INCHES 0.375
- Nominal Outside Diameter Tube Accommodated
- SECOND END INCHES 0.250
- Nominal Overall Length
- INCHES 1.219
- Part Name Assigned By Controlling Agency
- REDUCER, EXTERNAL THREAD, FLARELESS TUBE
- Special Features
- MATERIAL CORROSION RESISTANT STEEL (15-5PH) WITH CADMIUM PLATING; UNIVERSAL ENDS (TUBE OR BOSS)
- Material
- OVERALL STEEL CORROSION RESISTING
- Media For Which Designed
- SINGLE RESPONSE HYDRAULIC FLUID
- Surface Treatment
- OVERALL CADMIUM
- Surface Treatment Document And Classification
- OVERALL FED SPEC SINGLE TREATMENT RESPONSE QQ--416,TYE 2,CLASS 2
- Thread Series Designator
- ALL ENDS UNIFIED NATIONAL JOINT FINE (UNJF)
- Specification/Standard Data
- PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD 31343 - AS21916
Related stock numbers
Other NSNs filed under the same part numbers.
- 00-004-6542 · Elbow,Tube
- 00-009-8259 · Union,Tube
- 00-012-2310 · Nipple,Boss
- 00-027-5762 · Tee,Tube To Boss
- 00-033-4981 · Adapter,Straight,Tube To Boss
- 00-034-1411 · Nut,Tube Coupling
- 00-035-6733 · Connector,Multiple,Fluid Pressur
- 00-050-6850 · Tee,Tube To Boss
About this page
An NSN is 13 digits: the 4-digit Federal Supply Class and the 9-digit NIIN. Cross-references come from the federal logistics record; demand from DLA DIBBS, SAM.gov and FPDS; ADs from the Federal Register. Refreshed nightly. Market Pulse shows the whole market.
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