The Flange,pipe, cataloged under National Stock Number 4730-01-187-1209, is classified within Federal Supply Class 4730 (Hose, Pipe, Tube, Lubrication, and Railing Fittings) of the Pipe, Tubing, Hose, and Fittings group. Government technical data includes 22 specifications, cited from the U.S. Government catalog. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 4 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-01-187-1209 |
| Item Name | Flange,pipe |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Status | ACTIVE |
| Socket Diameter | 1.913 INCHES NOMINAL IN |
| Face Seating Surface Condition | MACHINED |
| Nominal Pipe Size for Which Designed | 1.500 INCHES IN |
| Socket Depth | 0.620 INCHES NOMINAL IN |
| Flange Section Style | RAISED FACE, SOCKET NECK |
| Style Designator | RECTANGULAR, WITH BOLT HOLES |
| Bolt Hole Diameter | 0.531 INCHES NOMINAL IN |
| Neck Height | 1.004 INCHES NOMINAL IN |
| Material Document and Classification | QQ-S-763,COND A FED SPEC SINGLE MATERIAL RESPONSE |
| Features Provided | O RING |
| Flange Length | 3.500 INCHES NOMINAL IN |
| Bolt Hole Quantity | 4 |
| Center to Center Distance Between Bolt Holes Along Length | 2.500 INCHES NOMINAL IN |
| Raised Face Diameter | 2.123 INCHES NOMINAL IN |
| Raised Face Height | 0.126 INCHES NOMINAL IN |
| Center to Center Distance Between Bolt Holes Along Width | 2.500 INCHES NOMINAL IN |
| Outside Edge to Bolt Hole Center Distance Along Length | 0.500 INCHES NOMINAL IN |
| Flange Width | 3.500 INCHES NOMINAL IN |
| Material | STEEL COMP 304 |
| Furnished Items | SCREW |
| Outside Edge to Bolt Hole Center Distance Along Width | 0.500 INCHES NOMINAL IN |
| Thickness | 1.280 INCHES NOMINAL IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| 4687676-051 | 5/2 Secondary reference U.S. Government activity |
| 2621-228-02 ASSY 51 | 3/2 Design control — primary reference U.S. Government activity |
| 4687676 | D/9 Drawing number reference only U.S. Government activity |
NSN 4730-01-187-1209 is a Flange,pipe, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
4 possible matches (shared part number, not a government interchangeability claim): 4730-01-281-5924, 4730-01-281-5925, 4730-01-309-8147. Verify interchangeability with system specifications before substitution.
Key specifications for 4730-01-187-1209: Socket Diameter: 1.913 INCHES NOMINAL IN; Face Seating Surface Condition: MACHINED; Nominal Pipe Size for Which Designed: 1.500 INCHES IN; Socket Depth: 0.620 INCHES NOMINAL IN. 22 specifications are documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
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.