The Seat,valve, cataloged under National Stock Number 4820-00-702-0271, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Ontic Engineering & Manufacturing, Inc Dba Ontic Us. Government technical data includes 10 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-00-702-0271 |
| Primary Part Number | 01-13282 |
| Item Name | Seat,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Ontic Engineering & Manufacturing, Inc Dba Ontic Us |
| Status | ACTIVE |
| Flange Seat to Disk End Height | 0.125 INCHES NOMINAL IN |
| Flange Diameter | 1.115 INCHES NOMINAL IN |
| Body Outside Diameter | 0.939 INCHES NOMINAL IN |
| Hardness Rating | 45.0 ROCKWELL C MINIMUM AND 50.0 ROCKWELL C MAXIMUM OVERALL |
| Body Stepped Inside Diameter | 0.626 INCHES NOMINAL FIRST STEP IN |
| Body Stepped Inside Diameter | 0.752 INCHES NOMINAL THIRD STEP IN |
| Body Stepped Inside Diameter | 0.812 INCHES NOMINAL SECOND STEP IN |
| Material | STEEL OVERALL |
| Seat Angle in Deg | 60.000 NOMINAL |
| Seating Surface Shape | ANGULAR |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL Q — CCL Item — Commerce Control List |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 01-13282 PRIMARY | Ontic Engineering & Manufacturing, Inc Dba Ontic Us (USA) |
| Reference | Meaning |
|---|---|
| 01-13282 | 5/9 Secondary reference Donallco Inc |
| 01-13282 | 5/9 Secondary reference U.S. Government activity |
NSN 4820-00-702-0271 is a Seat,valve, manufactured by Ontic Engineering & Manufacturing, Inc Dba Ontic Us, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-00-702-0271 has 1 manufacturer part number on file: 01-13282 (Ontic Engineering & Manufacturing, Inc Dba Ontic Us).
Key specifications for 01-13282: Flange Seat to Disk End Height: 0.125 INCHES NOMINAL IN; Flange Diameter: 1.115 INCHES NOMINAL IN; Overall Height: 1.683 INCHES NOMINAL IN; Body Outside Diameter: 0.939 INCHES NOMINAL IN. 10 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.
NSN 4820-00-702-0271 has DEMIL Code Q. Demilitarization may be required before disposal or transfer to non-military entities.
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.