The Restrictor,fluid Flow, cataloged under National Stock Number 4730-01-387-7243, 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 Howell Laboratories Inc Dba Howell Laboratories Inc. Government technical data includes 10 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 3 commercial cross-references from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 8 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-01-387-7243 |
| Primary Part Number | 31721-FSOB-4 |
| Item Name | Restrictor,fluid Flow |
| FSC / FSG | 4730 / 47 — No Item Name Available |
| Manufacturer | Howell Laboratories Inc Dba Howell Laboratories Inc |
| Status | ACTIVE |
| Thread Series | UNF LOCATION NOT OTHERWISE SPECIFIED |
| Thread Size Designator | 7/16-20 LOCATION NOT OTHERWISE SPECIFIED |
| Design Type | TUBULAR |
| Thread Class | 2A LOCATION NOT OTHERWISE SPECIFIED A |
| Thread Provision | THREADED LOCATION NOT OTHERWISE SPECIFIED |
| Thread Direction | RIGHT-HAND LOCATION NOT OTHERWISE SPECIFIED |
| Length | 0.625 INCHES NOMINAL IN |
| Orifice Diameter | 0.101 INCHES NOMINAL IN |
| Outside Diameter | 0.250 INCHES NOMINAL IN |
| Material | COPPER ALLOY |
| Acquisition Status | ACTIVE |
| HAZMAT | No |
| Part Number | Manufacturer |
|---|---|
| 5995 ITEM 4 | Howell Laboratories Inc Dba Howell Laboratories Inc (USA) |
| 5849 | Howell Laboratories Inc Dba Howell Laboratories Inc (USA) |
| 31721-FSOB-4 PRIMARY | Howell Laboratories Inc Dba Howell Laboratories Inc (USA) |
NSN 4730-01-387-7243 is a Restrictor,fluid Flow, manufactured by Howell Laboratories Inc Dba Howell Laboratories Inc, classified under FSC 4730 (No Item Name Available). Status: active.
NSN 4730-01-387-7243 has 3 cross-referenced part numbers: 5995 ITEM 4 (Howell Laboratories Inc Dba Howell Laboratories Inc), 5849 (Howell Laboratories Inc Dba Howell Laboratories Inc), 31721-FSOB-4 (Howell Laboratories Inc Dba Howell Laboratories Inc).
There are 8 known substitutes for 4730-01-387-7243: 4310-00-061-5067, 4930-00-141-8258, 5999-00-166-9771 and 5 more. Verify interchangeability with system specifications before substitution.
Key specifications for 31721-FSOB-4: Thread Series: UNF LOCATION NOT OTHERWISE SPECIFIED; Thread Size Designator: 7/16-20 LOCATION NOT OTHERWISE SPECIFIED; Design Type: TUBULAR; Thread Class: 2A LOCATION NOT OTHERWISE SPECIFIED A. 12 total characteristics are documented in the Federal Logistics Information System.