The Seat,valve, cataloged under National Stock Number 4810-00-511-1360, is classified within Federal Supply Class 4810 (Valves, Powered) of the Valves group. The manufacturer of record is Tactair Fluid Controls Inc. Government technical data includes 13 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4810-00-511-1360 |
| Primary Part Number | 640-2-11 |
| Item Name | Seat,valve |
| FSC / FSG | 4810 / 48 — Valves, Powered |
| Manufacturer | Tactair Fluid Controls Inc |
| Status | ACTIVE |
| Flange Seat to Disk End Height | 0.273 INCHES MINIMUM AND 0.315 INCHES MAXIMUM IN |
| Flange Diameter | 0.749 INCHES MINIMUM AND 0.750 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | MIL-S-5002 MIL SPEC ALL TREATMENT RESPONSES OVERALL |
| Body Outside Diameter | 0.571 INCHES MINIMUM AND 0.573 INCHES MAXIMUM IN |
| Seal Accommodation Type | GROOVED |
| Hardness Rating | 43.0 ROCKWELL C MINIMUM AND 47.0 ROCKWELL C MAXIMUM OVERALL |
| Material Document and Classification | QQ-S-763 TYPE 440C FED SPEC SINGLE MATERIAL RESPONSE OR MIL-S-853 CLASS 6 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Body Inside Diameter | 0.375 INCHES MINIMUM AND 0.376 INCHES MAXIMUM IN |
| Surface Treatment | PASSIVATE OVERALL |
| Under Flange Height | 0.402 INCHES MINIMUM AND 0.444 INCHES MAXIMUM IN |
| Test Data Document | 81349-MIL-I-6868 SPECIFICATION (INCLUDES ENGINEERING TYPE BULLETINS, BROCHURES,ETC., THAT REFLECT SPECIFICATION TYPE DATA IN SPECIFICATION FORMAT; EXCLUDES COMMERCIAL CATALOGS, INDUSTRY DIRECTORIES, AND SIMILAR TRADE PUBLICATIONS, REFLECTING GENERAL TYPE DATA ON CERTAIN ENVIRONMENTAL AND PERFORMANCE REQUIREMENTS AND TEST CONDITIONS THAT ARE SHOWN AS "TYPICAL", "AVERAGE", "NOMINAL", ETC.). |
| Material | STEEL CORROSION RESISTING OVERALL |
| Seating Surface Shape | ANGULAR |
| 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 |
|---|---|
| 640-2-11 PRIMARY | Tactair Fluid Controls Inc (USA) |
| Reference | Meaning |
|---|---|
| 640-2-11 | 3/9 Design control — primary reference Tactair Fluid Controls Inc Phoenix Controls Div |
NSN 4810-00-511-1360 is a Seat,valve, manufactured by Tactair Fluid Controls Inc, classified under FSC 4810, Valves, Powered. Status: active.
NSN 4810-00-511-1360 has 1 manufacturer part number on file: 640-2-11 (Tactair Fluid Controls Inc).
Key specifications for 640-2-11: Flange Seat to Disk End Height: 0.273 INCHES MINIMUM AND 0.315 INCHES MAXIMUM IN; Flange Diameter: 0.749 INCHES MINIMUM AND 0.750 INCHES MAXIMUM IN; Surface Treatment Document and Classification: MIL-S-5002 MIL SPEC ALL TREATMENT RESPONSES OVERALL; Body Outside Diameter: 0.571 INCHES MINIMUM AND 0.573 INCHES MAXIMUM IN. 13 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.