The Stone,sharpening, cataloged under National Stock Number 5345-00-253-4401, is classified within Federal Supply Class 5345 (Disks and Stones, Abrasive) of the Hardware and Abrasives group. The manufacturer of record is Saint-Gobain Abrasives Inc. Government technical data includes 3 specifications, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 4 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5345-00-253-4401 |
| Primary Part Number | FF644 |
| Item Name | Stone,sharpening |
| FSC / FSG | 5345 / 53 — Disks and Stones, Abrasive |
| Manufacturer | Saint-Gobain Abrasives Inc |
| Status | ACTIVE |
| Overall Diameter | 0.500 INCHES NOMINAL IN |
| Small End Diameter | 0.250 INCHES NOMINAL IN |
| Stone Style | SHARPENING |
| 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 |
|---|---|
| FF644 PRIMARY | Saint-Gobain Abrasives Inc (USA) |
| A240F0 PRIMARY | Tyrolit Wickman Inc (USA) |
| 334A | Ohmite Holding, L.l.c. (USA) |
| Reference | Meaning |
|---|---|
| SS-S-736 | 5/9 Secondary reference U.S. Government activity |
| FF644 | 5/9 Secondary reference Ohmite Holding, L.l.c. |
| 334A | 5/9 Secondary reference Cesiwid Inc |
| SS-S-736 TY3CLA1 | 5/9 Secondary reference U.S. Government activity |
| FF644 | 5/9 Secondary reference Norton Co Coated Abrasive Div |
NSN 5345-00-253-4401 is a Stone,sharpening, manufactured by Saint-Gobain Abrasives Inc, classified under FSC 5345, Disks and Stones, Abrasive. Status: active.
NSN 5345-00-253-4401 has 3 manufacturer part numbers on file: FF644 (Saint-Gobain Abrasives Inc), A240F0 (Tyrolit Wickman Inc), 334A (Ohmite Holding, L.l.c.).
4 possible matches (shared part number, not a government interchangeability claim): 6240-00-284-0413, 6625-00-799-8539, 6625-00-871-8012. Verify interchangeability with system specifications before substitution.
Key specifications for FF644: Overall Diameter: 0.500 INCHES NOMINAL IN; Overall Length: 4.000 INCHES NOMINAL IN; Small End Diameter: 0.250 INCHES NOMINAL IN; Stone Style: SHARPENING. 3 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.