The Diaphragm,valve,flat, cataloged under National Stock Number 4820-01-188-1355, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Griswold Industries Dba Cla-Val Co. Government technical data includes 8 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 2 commercial cross-references from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 3 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-188-1355 |
| Primary Part Number | C1951H 1 1-4IN |
| Item Name | Diaphragm,valve,flat |
| FSC / FSG | 4820 / 48 — No Item Name Available |
| Manufacturer | Griswold Industries Dba Cla-Val Co |
| Status | ACTIVE |
| Style Designator | FLAT |
| Material | RUBBER CHLOROPRENE CLASS CR |
| Bolt Hole Quantity | 9 |
| Bolt Circle Diameter | 4.719 INCHES NOMINAL IN |
| Material Thickness | 0.050 INCHES NOMINAL IN |
| Outside Diameter | 5.022 INCHES NOMINAL IN |
| Hole Diameter | 0.312 INCHES NOMINAL IN |
| Center Hole Diameter | 0.563 INCHES NOMINAL IN |
| Acquisition Status | ACTIVE |
| HAZMAT | No |
| Part Number | Manufacturer |
|---|---|
| C1951H 1 1-4IN PRIMARY | Griswold Industries Dba Cla-Val Co (USA) |
| C1951 | Griswold Industries Dba Cla-Val Co (USA) |
NSN 4820-01-188-1355 is a Diaphragm,valve,flat, manufactured by Griswold Industries Dba Cla-Val Co, classified under FSC 4820 (No Item Name Available). Status: active.
NSN 4820-01-188-1355 has 2 cross-referenced part numbers: C1951H 1 1-4IN (Griswold Industries Dba Cla-Val Co), C1951 (Griswold Industries Dba Cla-Val Co).
There are 3 known substitutes for 4820-01-188-1355: 4820-00-306-1213, 4470-00-419-0674, 4820-01-560-7380. Verify interchangeability with system specifications before substitution.
Key specifications for C1951H 1 1-4IN: Style Designator: FLAT; Material: RUBBER CHLOROPRENE CLASS CR; Bolt Hole Quantity: 9; Bolt Circle Diameter: 4.719 INCHES NOMINAL IN. 8 total characteristics are documented in the Federal Logistics Information System.