# Thick Washer, Flat Washer Type Standard, Material Steel, Material Grade/Class Grade 5, Finish Black Oxide, For Screw Size M30, Inside Diameter 31 mm, Outside Diameter 44 mm, Maximum Thickness 4 mm, System of Measurement Metric, Minimum Thickness 4 mm, Color Black, Inside Diameter Tolerance +/-0.010 in, Outside Diameter Tolerance +/-0.010 in, Pack Size Small Pack, Rockwell Hardness C4, Thickness Tolerance +0.40mm/-0.50mm, Package Quantity 5

**Manufacturer:** Zoro Select  
**MPN:** `Z8830`

## Specifications

| Attribute | Value |
| --- | --- |
| Brand name | Zoro Select |
| Manufacturer name | Zoro Select |
| Manufacturer | Zoro Select |
| CategoryId | 4958 |
| CategoryIdL1 | 9 |
| CategoryIdL2 | 4385 |
| CategoryIdL3 | 15199 |
| CategoryIdL4 | 4958 |
| CategoryL1 | Fasteners |
| CategoryL2 | Washers |
| CategoryL3 | General Washers |
| CategoryL4 | Flat Washers |
| DimensionUnit | inch |
| GTIN | None |
| GraingerSku | 5RE96 |
| UPC | None |
| UnitOfMeasure | PK |
| Weight | 0.24 |
| WeightUnit | lbs |
| cali_prop65_orglabel | False |
| cali_prop65_whtlabel | False |
| color | Black |
| countryOfOrigin | US |
| height | 1 |
| jsonUrlData | 924526ffbdad25e5923b |
| length | 3 |
| moq | 1 |
| MPN | Z8830 |
| multiple | 1 |
| qtyInStock | 45 |
| qtyInStockOverride | -2 |
| SKU | G3010357 |
| tierMinQty1 | 1 |
| tierPrice1 | 7.79 |
| url | https://www.zoro.com/zoro-select-flat-washer-fits-bolt-size-m30-steel-black-oxide-finish-5-pk-z8830/i/G3010357/ |
| width | 2 |
| Fits Bolt Sizes | M30 |
| Washer Outside Dia | 44 mm |
| Washer Inside Dia | 31 mm |
| Inside Dia | 31mm |
| Inside Diameter | 31 mm |
| Outside Diameter | 44 mm |
| For Screw Size | M30 |
| Inside Diameter Tolerance | +/-0.010 in |
| Outside Diameter Tolerance | +/-0.010 in |
| Item | Flat Washer |
| Material | Steel |
| Finish | Black Oxide |
| Thickness | 3.5 mm to 4.4 mm |
| Washer Standards | N/A |
| System of Measurement | Metric |
| Flat Washer Type | Thick Flat Washer |
| Rockwell Hardness | 16N80 |
| Application | Load Distributing |
| Thickness Tolerance | +0.40mm/-0.50mm |
| Type | Standard |
| Color | Black |
| Material Type | Steel |

## Distributor availability

| Distributor | SKU | Price (USD) | Qty | Stock | MOQ |
| --- | --- | --- | --- | --- | --- |
| Zoro | G3010357 | 7.79 | 1 | 45 | 1 |

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Structured data: `/python/html6/product/500/218000000/218372000/part_--Z8830---ZoroSelect--f83bc25c22.json`  
Search API: https://www.dataalchemy.com/api/  
MCP server: https://www.dataalchemy.com/mcp