The Pilot,valve Seat Refacing, cataloged under National Stock Number 4910-01-353-3101, is classified within Federal Supply Class 4910 (Motor Vehicle Maintenance and Repair Shop Specialized Equipment) of the Maintenance and Repair Shop Equipment group. The manufacturer of record is Sioux Tools Inc. Government technical data includes 6 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 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4910-01-353-3101 |
| Primary Part Number | T345 |
| Item Name | Pilot,valve Seat Refacing |
| FSC / FSG | 4910 / 49 — Motor Vehicle Maintenance and Repair Shop Specialized Equipment |
| Manufacturer | Sioux Tools Inc |
| Status | ACTIVE |
| Design Type | SOLID |
| Upper End Diameter | 0.563 INCHES NOMINAL IN |
| Lower End Length | 3.563 INCHES NOMINAL IN |
| Style Designator | ROUND |
| Size | 0.3438 INCHES MINIMUM AND 0.3458 INCHES MAXIMUM IN |
| Upper End Length | 4.000 INCHES NOMINAL IN |
| 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 |
|---|---|
| T345 PRIMARY | Sioux Tools Inc (USA) |
NSN 4910-01-353-3101 is a Pilot,valve Seat Refacing, manufactured by Sioux Tools Inc, classified under FSC 4910, Motor Vehicle Maintenance and Repair Shop Specialized Equipment. Status: active.
NSN 4910-01-353-3101 has 1 manufacturer part number on file: T345 (Sioux Tools Inc).
1 possible match (shared part number, not a government interchangeability claim): 6515-01-506-8786. Verify interchangeability with system specifications before substitution.
Key specifications for T345: Design Type: SOLID; Upper End Diameter: 0.563 INCHES NOMINAL IN; Lower End Length: 3.563 INCHES NOMINAL IN; Style Designator: ROUND. 6 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.