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NSN 4730-01-173-1247Government record, cited
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Elbow, Flange to Tube4730-01-173-1247

NSN 4730-01-173-1247 · NIIN 011731247 · Part number 2621-166-04ASSY112
Derbyshire Machine & Tool Co · FSC 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings · FSG 47 — Pipe, Tubing, Hose, and Fittings · CAGE 71905
Government record, cited
NSN 4730-01-173-1247 — this item is cataloged by the U.S. Government under National Stock Number 4730-01-173-1247. Manufacturer of record part number: 2621-166-04ASSY112.
Also searched as  4730-01-173-1247 · 4730011731247 · NIIN 011731247 · 01-173-1247 · FSC 4730 Hose, Pipe, Tube, Lubrication, and Railing Fittings · CAGE 71905 · 2621-166-04ASSY112 · 516-4695758 · 2621-166-04 ASSY 112 · 516-4695758F4 · 2621-166-04
Nearby stock numbers  ·
HOSE FITTING
4730-01-173-1247 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
Features
  • Elbow,flange to Tube — FSC 4730
  • Material Document and Classification: QQ-S-763,CL 304,COND A FED SPEC SINGLE MATERIAL RESPONSE OVERALL
  • Operating Pressure: 3000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
  • Surface Treatment: PASSIVATE OVERALL
  • Material: STEEL COMP 304 OVERALL
  • 2 manufacturer part numbers on file
  • Manufacturer of record: Derbyshire Machine & Tool Co
Identification
  • NSN: 4730-01-173-1247
  • NIIN: 011731247
  • FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
  • FSG: 47 — Pipe, Tubing, Hose, and Fittings
  • Primary part number: 2621-166-04ASSY112
  • Manufacturer: Derbyshire Machine & Tool Co
General Description

The Elbow,flange to Tube, cataloged under National Stock Number 4730-01-173-1247, is classified within Federal Supply Class 4730 (Hose, Pipe, Tube, Lubrication, and Railing Fittings) of the Pipe, Tubing, Hose, and Fittings group. The manufacturer of record is Derbyshire Machine & Tool Co. Government technical data includes 4 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 7 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4730-01-173-1247
Primary Part Number2621-166-04ASSY112
Item NameElbow,flange to Tube
FSC / FSG4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
ManufacturerDerbyshire Machine & Tool Co
StatusACTIVE
Material Document and ClassificationQQ-S-763,CL 304,COND A FED SPEC SINGLE MATERIAL RESPONSE OVERALL
Operating Pressure3000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
Surface TreatmentPASSIVATE OVERALL
MaterialSTEEL COMP 304 OVERALL
Lifecycle & Compliance
Acquisition StatusACTIVE
DEMIL CodeDEMIL A — No Demilitarization Required
HazardNo hazard code in the DLA record (HMIC N)
Criticality CodeX
⇄ Related Items 7
Each row states its source: a government interchangeability/replacement code, or a possible match on a shared part number.
4730-01-178-70762621-166-04 ASSY A88 POSSIBLE MATCH
ELBOW,FLANGE TO PIPE
Possible match (shared part number)Electric Boat Corporation Div General Dynamics Electric Boat
4730-01-318-62232621-166-04 PC 202 POSSIBLE MATCH
ELBOW,PIPE
Possible match (shared part number)Electric Boat Corporation Div General Dynamics Electric Boat
4730-01-329-1844262116604-211A POSSIBLE MATCH
ELBOW,PIPE
Possible match (shared part number)Electric Boat Corporation Div General Dynamics Electric Boat
4730-01-329-1845262116604-160 POSSIBLE MATCH
ELBOW,PIPE
Possible match (shared part number)Electric Boat Corporation Div General Dynamics Electric Boat
4730-01-350-3736262116604-0142 POSSIBLE MATCH
ELBOW,PIPE
Possible match (shared part number)Electric Boat Corporation Div General Dynamics Electric Boat
4730-01-350-378314-97-2046 POSSIBLE MATCH
ELBOW,FLANGE TO PIPE
Possible match (shared part number)Electric Boat Corporation Div General Dynamics Electric Boat
4730-01-350-3784218022275 POSSIBLE MATCH
ELBOW,FLANGE TO PIPE
Possible match (shared part number)Electric Boat Corporation Div General Dynamics Electric Boat
Cross-Reference Index
Part NumberManufacturer
2621-166-04ASSY112 Derbyshire Machine & Tool Co (USA)
2621-166-04ASSY112 Guill Tool & Engineering Co Inc Div Guill Defense (USA)
Reference documents
ReferenceMeaning
516-4695758 D/9 Drawing number reference only
U.S. Government activity
2621-166-04 ASSY 112 3/2 Design control — primary reference
U.S. Government activity
516-4695758F4 5/2 Secondary reference
U.S. Government activity
2621-166-04 D/9 Drawing number reference only
U.S. Government activity
Related Parts
4730-01-178-7076POSSIBLE MATCH
ELBOW,FLANGE TO PIPE
2621-166-04 ASSY A88
4730-01-318-6223POSSIBLE MATCH
ELBOW,PIPE
2621-166-04 PC 202
4730-01-329-1844POSSIBLE MATCH
ELBOW,PIPE
262116604-211A
4730-01-329-1845POSSIBLE MATCH
ELBOW,PIPE
262116604-160
4730-01-350-3736POSSIBLE MATCH
ELBOW,PIPE
262116604-0142
4730-01-350-3783POSSIBLE MATCH
ELBOW,FLANGE TO PIPE
14-97-2046
4730-01-350-3784POSSIBLE MATCH
ELBOW,FLANGE TO PIPE
218022275

Frequently Asked Questions

What is NSN 4730-01-173-1247?

NSN 4730-01-173-1247 is a Elbow,flange to Tube, manufactured by Derbyshire Machine & Tool Co, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.

What part numbers are listed for NSN 4730-01-173-1247?

NSN 4730-01-173-1247 has 2 manufacturer part numbers on file: 2621-166-04ASSY112 (Derbyshire Machine & Tool Co), 2621-166-04ASSY112 (Guill Tool & Engineering Co Inc Div Guill Defense).

What NSN replaces 4730-01-173-1247?

7 possible matches (shared part number, not a government interchangeability claim): 4730-01-178-7076, 4730-01-318-6223, 4730-01-329-1844. Verify interchangeability with system specifications before substitution.

What are the specifications of 2621-166-04ASSY112?

Key specifications for 2621-166-04ASSY112: Material Document and Classification: QQ-S-763,CL 304,COND A FED SPEC SINGLE MATERIAL RESPONSE OVERALL; Operating Pressure: 3000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS; Surface Treatment: PASSIVATE OVERALL; End Item Identification: 23N SHIP, OHIO CLASS ASSN (TRIDENT). 4 specifications are documented in the U.S. Government catalog.

Is NSN 4730-01-173-1247 hazardous material?

No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.

Sources

U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.

U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.

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✓ Data cited from the U.S. Government catalog; commercial cross-references from OEM and certified industry sources.
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