# Proto

**Manufacturer:** Proto  
**MPN:** `J5259B`

## Specifications

| Attribute | Value |
| --- | --- |
| Brand name | Proto |
| Manufacturer name | Proto |
| Manufacturer | Proto, Stanley Proto |
| DimensionUnit | inch |
| GraingerSku | 5F428 |
| Extra Product Name | Proto |
| UPC | 662679290375 |
| UnitOfMeasure | EA |
| Weight | 0.1, 0.02, 0.022046001186074866 |
| WeightUnit | lbs |
| cali_prop65_orglabel | False |
| cali_prop65_whtlabel | False |
| countryOfOrigin | US |
| height | 0.6 |
| jsonUrlData | 924526ffbdad25e5923b |
| length | 1.8 |
| moq | 1 |
| MPN | J5259B |
| multiple | 1 |
| qtyInStock | 117 |
| qtyInStockOverride | -2 |
| SKU | G7620426 |
| tierMinQty1 | 1 |
| tierPrice1 | 5.06 |
| url | https://www.zoro.com/proto-socket-extension-38-in-dr-1-34-in-l-j5259b/i/G7620426/ |
| width | 0.6 |
| EAN | 662679290375 |
| Part Number | J5259B |
| Model | J5259B |
| Product Group | Home Improvement |
| Drive Size | 3/8" |
| SAE or Metric | SAE |
| Overall Length | 1 3/4 in |
| Finish | Black Oxide |
| Number of Pieces | 1 |
| Item | Locking Extension |
| For Use With | 3/8" Drive Sockets |
| Standards | ASME B107.110-2012, SAE AS4283C |
| Output Drive Size | 3/8 in |
| Number of Points | 4 |
| Output Drive Type | Male Square |
| Locking | No |
| Drive Type | Female Square |
| Input Drive Gender | Female |
| Insulated | No |
| Input Drive Shape | Square |
| Output Drive Gender | Male |
| Output Drive Shape | Square |
| Socket Extension Type | Standard |
| Input Drive Size | 3/8 in |
| Non-Sparking | No |
| Country of Origin (subject to change) | United States |
| ASIN | B001HWEB78 |
| AdultProduct | False |
| Asin | B001HWEB78 |
| Autographed | False |
| Batteries_required | False |
| Binding | Tools & Home Improvement |
| Brand | Proto, Stanley-Proto |
| Bullet_point | 3/8-inch Drive size, Black Oxide finish, Made of heat-treated alloy steel, Standard Extensions |

## Distributor availability

| Distributor | SKU | Price (USD) | Qty | Stock | MOQ |
| --- | --- | --- | --- | --- | --- |
| Zoro | G7620426 | 5.06 | 1 | 117 | 1 |
| Grainger | 5F428 |  |  | None | 1 |
| ToolUp.com | PROTO J5259B | 5.44 | 1 | None | 1 |
| motionindustries.com | 01167130 | 7.07 | 1 | None | 1 |
| Raptor Supplies | AE3REM | 11.955645 | 1 | None | 1 |
| Applied Industrial | 105839138 |  |  | None | 1 |
| bscsource.com | J5259B | 7.79 | 1 | None | 1 |
| National Supply Network | B945396 |  |  | None | 1 |
| sustainablesupply.com | C2807579 | 8.33 | 1 | None | 1 |
| Guardian | 02290906 | 9.37 | 1 | None | 1 |
| stellarindustrial.com | PROTO 5259B |  |  | None | 1 |
| Turner Supply | 267929037 |  |  | None | 1 |
| grainger.ca | PRT5259B | 11.62015406 | 1 | None | 1 |
| National Supply Network | 02290906 | 8.83 | 1 | None | 1 |
| imsbolt.com | J5259B | 10.73 | 1 | None | 1 |
| directools.com | J5259B | 5.23 | 1 | None | 1 |

---
Structured data: `/python/html6/product/500/9500000/9593000/part_--J5259B---Proto--0e6c31320e.json`  
Search API: https://www.dataalchemy.com/api/  
MCP server: https://www.dataalchemy.com/mcp