# O1 Tool Steel Rectangular Bar, Material Tool Steel, Material Grade O1, Thickness 0.25 in, Thickness Tolerance +/-0.001 in, Overall Length 18 in, Overall Width 1 in, Fabrication Hot Rolled, Heat Treatable Yes, Heat Treatment Oil Hardened, Mechanical Finish Precision Ground, Yield Strength 55,000 psi, Tensile Strength 95,000 psi, Brinell Hardness 177 to 212, Rockwell Hardness C18, Standards AISI O-1, ASTM A681-08, FEDERAL QQT 570 REV C, SAE J437, UNS T31501, Includes Material Certificate Yes

**Manufacturer:** Zoro Select  
**MPN:** `O11418`

## Specifications

| Attribute | Value |
| --- | --- |
| Brand name | Zoro Select |
| Manufacturer name | Zoro Select |
| Manufacturer | Zoro Select |
| CategoryId | 10414 |
| CategoryIdL1 | 37 |
| CategoryIdL2 | 9066 |
| CategoryIdL3 | 10414 |
| CategoryL1 | Raw Materials |
| CategoryL2 | Stainless Steel |
| CategoryL3 | Steel Stock |
| DimensionUnit | inch |
| GTIN | None |
| GraingerSku | 33J185 |
| UPC | None |
| UnitOfMeasure | EA |
| Weight | 1.3 |
| WeightUnit | lbs |
| cali_prop65_message | WARNING: Cancer - www.P65Warnings.ca.gov |
| cali_prop65_orglabel | False |
| cali_prop65_warnmsgscenario | 5 |
| cali_prop65_whtlabel | True |
| countryOfOrigin | DE |
| height | 0.3 |
| jsonUrlData | 924526ffbdad25e5923b |
| length | 19 |
| moq | 1 |
| MPN | O11418 |
| multiple | 1 |
| qtyInStock | 11 |
| qtyInStockOverride | -2 |
| SKU | G4558215 |
| tierMinQty1 | 1 |
| tierPrice1 | 32.39 |
| url | https://www.zoro.com/zoro-select-oil-hard-flat-stock-o1-1-in-wx18-in-l-o11418/i/G4558215/ |
| width | 2 |
| Length | 18 in |
| Width | 1 in |
| Length Tolerance | +0.125 in/0.250 in |
| Width Tolerance | +0.005 in/-0.000 in |
| Nominal Size (WxL) | 1 in x 18 in |
| Overall Length | 18 in |
| Overall Width | 1 in |
| Item | O1 Tool Steel Rectangular Bar |
| Material | Steel |
| Thickness | 1/4 in |
| Hardness Scale | 177 to 212 BHN |
| Finish | RMS 45 Max |
| Grade | O1 |
| Standards | UNS T31501, SAE J-437, ASTM A-681-07, FEDERAL QQT-570 REV C |
| Thickness Tolerance | +/-0.001 in |
| Product Type | Oil Hard Flat Stock |
| Heat Treatable | Yes |
| Yield Strength | 55,000 psi |
| Includes Material Certificate | Yes |
| System of Measurement | Inch |
| Mechanical Finish | Precision Ground |
| Tolerance Rating | Standard |
| Material Grade | O1 |
| Heat Treatment | Oil Hardened |

## Distributor availability

| Distributor | SKU | Price (USD) | Qty | Stock | MOQ |
| --- | --- | --- | --- | --- | --- |
| Zoro | G4558215 | 32.39 | 1 | 11 | 1 |
| AmazonSC | B01LXVKWSV | 36.06 | 1 | None | 1 |

---
Structured data: `/python/html6/product/500/9000000/9057000/part_--O11418---ZoroSelect--f72e3cd293.json`  
Search API: https://www.dataalchemy.com/api/  
MCP server: https://www.dataalchemy.com/mcp