PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

91012-991Reducer,tube

U.s. Defense Services, Inc. Dba Usds · NSN 4730-01-165-4703 · FSC 4730 · No Item Name Available
Verified by PartsTable
NSN 4730-01-165-4703 — this item is cataloged by the U.S. Government under National Stock Number 4730-01-165-4703. Primary manufacturer part number: 91012-991.
Features
  • Reducer,tube — FSC 4730
  • 5 verified cross-references
  • Primary manufacturer: U.s. Defense Services, Inc. Dba Usds
Applications
  • Fluid conveyance
  • Hydraulic system plumbing
  • Pneumatic line routing
General Description

The Reducer,tube, cataloged under National Stock Number 4730-01-165-4703, is classified within Federal Supply Class 4730 (No Item Name Available) of the Pipe, Tubing, Hose, and Fittings group. The primary manufacturer of record is U.s. Defense Services, Inc. Dba Usds. This item has 5 commercial cross-references from 5 manufacturers, enabling identification through both NSN and commercial part number lookups. 7 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Catalog Facts
Item NameReducer,tube
FSC / FSG4730 — No Item Name Available (FSG 47)
ManufacturersU.s. Defense Services, Inc. Dba Usds (CAGE 0BAT5); Bae Systems Hagglunds Aktiebolag (CAGE AC90N); Bae Systems Hagglunds Ab (CAGE S3465); Ap Hydraulics Ltd (CAGE K0092); Nimikkeistokeskus Ncb Finland (CAGE A486G)
Technical Specifications
ParameterValue
NSN4730-01-165-4703
Primary Part Number91012-991
Item NameReducer,tube
FSC / FSG4730 / 47 — No Item Name Available
ManufacturerU.s. Defense Services, Inc. Dba Usds
StatusACTIVE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 7
2240-00-632-4559 INTERCHANGEABLE
Bell Ringer Assy
6685-00-793-8019 INTERCHANGEABLE
Pyrometer,indicating
5331-01-170-307312860 INTERCHANGEABLE
O-Ring
Emerson Electric Co H and H Precision Products in-Sink-Erator Div
6150-01-173-858212860 INTERCHANGEABLE
Cable Assembly,special Purpose,e
Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp
5120-01-367-3329 INTERCHANGEABLE
Crowfoot Attachment,socket Wrenc
5340-01-499-100712860 INTERCHANGEABLE
Bracket,mounting
Dh Instruments Inc.
6625-01-651-6467VP9191 INTERCHANGEABLE
Voltmeter
Faria Beede Instruments, Inc. Dba Faria Beede Instruments Inc
Cross-Reference Index
Part NumberManufacturer
91012-991 U.s. Defense Services, Inc. Dba Usds (USA)
25212191-158 Bae Systems Hagglunds Aktiebolag (SWE)
25212191-158 Bae Systems Hagglunds Ab (SWE)
12860 Ap Hydraulics Ltd (GBR)
445-9803 Nimikkeistokeskus Ncb Finland (FIN)
Related Parts
2240-00-632-4559INTERCHANGEABLE
BELL RINGER ASSY
6685-00-793-8019INTERCHANGEABLE
PYROMETER,INDICATING
5331-01-170-3073INTERCHANGEABLE
O-RING
12860
6150-01-173-8582INTERCHANGEABLE
CABLE ASSEMBLY,SPECIAL PURPOSE,E
12860
5120-01-367-3329INTERCHANGEABLE
CROWFOOT ATTACHMENT,SOCKET WRENC
5340-01-499-1007INTERCHANGEABLE
BRACKET,MOUNTING
12860
6625-01-651-6467INTERCHANGEABLE
VOLTMETER
VP9191

Frequently Asked Questions

What is NSN 4730-01-165-4703?

NSN 4730-01-165-4703 is a Reducer,tube, manufactured by U.s. Defense Services, Inc. Dba Usds, classified under FSC 4730 (No Item Name Available). Status: active.

What are the part numbers for NSN 4730-01-165-4703?

NSN 4730-01-165-4703 has 5 cross-referenced part numbers: 91012-991 (U.s. Defense Services, Inc. Dba Usds), 25212191-158 (Bae Systems Hagglunds Aktiebolag), 25212191-158 (Bae Systems Hagglunds Ab), 12860 (Ap Hydraulics Ltd), 445-9803 (Nimikkeistokeskus Ncb Finland).

What NSN replaces 4730-01-165-4703?

There are 7 known substitutes for 4730-01-165-4703: 2240-00-632-4559, 6685-00-793-8019, 5331-01-170-3073 and 4 more. Verify interchangeability with system specifications before substitution.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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