The Flange,pipe, cataloged under National Stock Number 4730-01-420-5666, 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 Ammcon Corp.. Government technical data includes 11 specifications, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 6 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-01-420-5666 |
| Primary Part Number | 7181-100 |
| Item Name | Flange,pipe |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Ammcon Corp. |
| Status | ACTIVE |
| Nominal Pipe Size for Which Designed | 0.500 INCHES IN |
| Flange Section Style | PLAIN FACE, RAISED NECK |
| Style Designator | OVAL, ONE BOLT HOLE CIRCLE |
| Bolt Hole Diameter | 0.562 INCHES NOMINAL IN |
| Material Document and Classification | MIL-C-15726 MIL SPEC SINGLE MATERIAL RESPONSE |
| Flange Length | 5.063 INCHES NOMINAL IN |
| Nominal Thread Size | 1.500 INCHES IN |
| Reducer Flange Hole Type | CONCENTRIC |
| Bolt Hole Quantity | 6 |
| Bolt Circle Diameter | 3.938 INCHES NOMINAL IN |
| Material | COPPER ALLOY 715 |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 7181-100 PRIMARY | Ammcon Corp. (USA) |
| 6981-100 PRIMARY | Flagg Stanley G & Co Inc Dba Flagg Brass (USA) |
| 018163-FI | Bec Systems Llc Dba Bec Machine Products (USA) |
| Reference | Meaning |
|---|---|
| 22144100 1/2 IN | C/1 Advisory reference — outside the item-of-supply concept W & O Supply Inc |
| 22144100 | 5/9 Secondary reference W & O Supply Inc |
| 810-4715319 FIG 5-C,ITEM NO. 131 | 3/2 Design control — primary reference U.S. Government activity |
| 00699067697010 | 5/1 Secondary reference Flagg Stanley G & Co Inc Dba Flagg Brass |
| 22144100 1/2 INCH SW 250 | 5/9 Secondary reference W & O Supply Inc |
| 810-4715319 | D/9 Drawing number reference only U.S. Government activity |
NSN 4730-01-420-5666 is a Flange,pipe, manufactured by Ammcon Corp., classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-420-5666 has 3 manufacturer part numbers on file: 7181-100 (Ammcon Corp.), 6981-100 (Flagg Stanley G & Co Inc Dba Flagg Brass), 018163-FI (Bec Systems Llc Dba Bec Machine Products).
Key specifications for 7181-100: Nominal Pipe Size for Which Designed: 0.500 INCHES IN; Flange Section Style: PLAIN FACE, RAISED NECK; Style Designator: OVAL, ONE BOLT HOLE CIRCLE; Bolt Hole Diameter: 0.562 INCHES NOMINAL IN. 11 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.