The Seat,valve, cataloged under National Stock Number 4820-00-956-1413, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Steward Machine Co Inc. Government technical data includes 9 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 6 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 1 verified substitute exists in the FLIS interchangeability database. Current acquisition status: Cancelled.
| Parameter | Value |
|---|---|
| NSN | 4820-00-956-1413 |
| Primary Part Number | 587-551 |
| Item Name | Seat,valve |
| FSC / FSG | 4820 / 48 — No Item Name Available |
| Manufacturer | Steward Machine Co Inc |
| Status | CANCELLED |
| Material | STEEL BODY |
| Seating Surface Shape | ANGULAR |
| Material | COBALT ALLOY FACE |
| Material Document and Classification | MIL-R-17131,TYPE MIL-RCOCR-A MIL SPEC SINGLE MATERIAL RESPONSE FACE |
| Body Outside Diameter | 2.491 INCHES MINIMUM AND 2.492 INCHES MAXIMUM IN |
| Material Document and Classification | 17-4PH,ARMCO STEEL CORP MFR REF SINGLE MATERIAL RESPONSE BODY |
| Body Inside Diameter | 1.557 INCHES MINIMUM AND 1.567 INCHES MAXIMUM IN |
| Seat Angle in Deg | 45.000 NOMINAL |
| Seal Accommodation Type | RECESSED |
| Acquisition Status | CANCELLED |
| HAZMAT | No |
| Part Number | Manufacturer |
|---|---|
| 60-656PC551 | Hardie-Tynes Co., Inc. (USA) |
| 60-587PC551 | Hardie-Tynes Co., Inc. (USA) |
| 587-551 PRIMARY | Steward Machine Co Inc (USA) |
| 587-551 | Hardie-Tynes Co., Inc. (USA) |
| 60-606PC551 | Hardie-Tynes Co., Inc. (USA) |
| 60-649PC551 | Hardie-Tynes Co., Inc. (USA) |
NSN 4820-00-956-1413 is a Seat,valve, manufactured by Steward Machine Co Inc, classified under FSC 4820 (No Item Name Available). Status: cancelled.
NSN 4820-00-956-1413 has 6 cross-referenced part numbers: 60-656PC551 (Hardie-Tynes Co., Inc.), 60-587PC551 (Hardie-Tynes Co., Inc.), 587-551 (Steward Machine Co Inc), 587-551 (Hardie-Tynes Co., Inc.), 60-606PC551 (Hardie-Tynes Co., Inc.) and 1 more.
There is 1 known substitute for 4820-00-956-1413: 3110-00-100-0593. Verify interchangeability with system specifications before substitution.
Key specifications for 587-551: Material: STEEL BODY; Seating Surface Shape: ANGULAR; Material: COBALT ALLOY FACE; Material Document and Classification: MIL-R-17131,TYPE MIL-RCOCR-A MIL SPEC SINGLE MATERIAL RESPONSE FACE. 9 total characteristics are documented in the Federal Logistics Information System.
NSN 4820-00-956-1413 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.