The Tee,pipe, cataloged under National Stock Number 4730-01-384-6250, 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 Tylok International, Inc.. Government technical data includes 7 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-01-384-6250 |
| Primary Part Number | B4-3MMM-4 |
| Item Name | Tee,pipe |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Tylok International, Inc. |
| Status | ACTIVE |
| Connection Style | PLAIN (PIPE) ALL ENDS |
| Connection Type | THREADED EXTERNAL PIPE ALL ENDS |
| Leg Length | 0.969 INCHES NOMINAL ALL ENDS IN |
| Nominal Thread Size | 0.250 INCHES ALL ENDS IN |
| Media for Which Designed | WATER SINGLE RESPONSE |
| Material | COPPER ALLOY OVERALL |
| Thread Series Designator | NPT ALL ENDS |
| 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 |
|---|---|
| B4-3MMM-4 PRIMARY | Tylok International, Inc. (USA) |
| Reference | Meaning |
|---|---|
| 13227E9240 | D/9 Drawing number reference only U.S. Government activity |
| B-4-MT | 5/9 Secondary reference Cajon Co |
| B-4-MT | 5/9 Secondary reference Swagelok Co |
| 13227E9240-5 | 7/2 Vendor item drawing reference U.S. Government activity |
| ASC1351497 | 5/9 Secondary reference Asc Pty Ltd |
NSN 4730-01-384-6250 is a Tee,pipe, manufactured by Tylok International, Inc., classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-384-6250 has 1 manufacturer part number on file: B4-3MMM-4 (Tylok International, Inc.).
Key specifications for B4-3MMM-4: Connection Style: PLAIN (PIPE) ALL ENDS; Connection Type: THREADED EXTERNAL PIPE ALL ENDS; Leg Length: 0.969 INCHES NOMINAL ALL ENDS IN; Nominal Thread Size: 0.250 INCHES ALL ENDS IN. 7 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.