The Valve,check, cataloged under National Stock Number 4820-00-937-5914, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Industrial Technologies and Services Llc. Government technical data includes 19 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 8 commercial cross-references from 5 manufacturers, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.
| Parameter | Value |
|---|---|
| NSN | 4820-00-937-5914 |
| Primary Part Number | 21537 |
| Item Name | Valve,check |
| FSC / FSG | 4820 / 48 — No Item Name Available |
| Manufacturer | Industrial Technologies and Services Llc |
| Status | CANCELLED |
| Bolt Circle Nominal Diameter | 5.937 INCHES SECOND END IN |
| Valve Operation Method | AUTOMATIC |
| Mounting Position | VERTICAL |
| Connection Type | FLANGE SECOND END |
| Connection Type | THREADED INTERNAL PIPE FIRST END |
| Flange Face Design | PLAIN SECOND END |
| Bolt Hole Quantity | 3 SECOND END |
| Material | COPPER ALLOY BODY |
| Nominal Outside Diameter | 6.562 INCHES SECOND END IN |
| Style Designator | STRAIGHT THRU |
| Nominal Thickness | 0.235 INCHES SECOND END IN |
| Thread Series Designator | NPT FIRST END |
| Flow Control Device | POPPET |
| Material | COPPER ALLOY AND RUBBER SYNTHETIC FLOW CONTROL DEVICE |
| Flange Shape | ROUND WITH HOLES SECOND END |
| Connection Style | PLAIN, OPTIONAL END (PIPE) FIRST END |
| Bolt Hole Nominal Diameter | 0.188 INCHES SECOND END IN |
| Thread Direction | RIGHT-HAND FIRST END |
| Nominal Thread Size | 1.500 INCHES FIRST END IN |
| Acquisition Status | CANCELLED |
| HAZMAT | No |
| Part Number | Manufacturer |
|---|---|
| 21537 PRIMARY | Industrial Technologies and Services Llc (USA) |
| M21 | Uniflite Inc (USA) |
| 2125A PRIMARY | Industrial Technologies and Services Llc (USA) |
| 008469 | Uniflite Inc (USA) |
| 2125A | Whiting W H Co (USA) |
| 008469-9 | Sea Cure Technology, Inc (USA) |
| 008469-9 | Uniflite Inc (USA) |
| 266ITEM2 | Naval Inventory Control Point Mechanicsburg (USA) |
NSN 4820-00-937-5914 is a Valve,check, manufactured by Industrial Technologies and Services Llc, classified under FSC 4820 (No Item Name Available). Status: cancelled.
NSN 4820-00-937-5914 has 8 cross-referenced part numbers: 21537 (Industrial Technologies and Services Llc), M21 (Uniflite Inc), 2125A (Industrial Technologies and Services Llc), 008469 (Uniflite Inc), 2125A (Whiting W H Co) and 3 more.
There are 12 known substitutes for 4820-00-937-5914: 4440-00-008-4864, 1450-00-137-6221, 5330-00-253-5905 and 9 more. Verify interchangeability with system specifications before substitution.
Key specifications for 21537: Bolt Circle Nominal Diameter: 5.937 INCHES SECOND END IN; Valve Operation Method: AUTOMATIC; Mounting Position: VERTICAL; Connection Type: FLANGE SECOND END. 19 total characteristics are documented in the Federal Logistics Information System.
NSN 4820-00-937-5914 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.