# Extension 1/2M-3/8F

**Manufacturer:** Apex  
**MPN:** `EX-503`

The Apex EX-503 is a part manufactured by Master Power. It has a minimum order quantity of 1 unit. The manufacturer's part number is EX-503.

## Specifications

| Attribute | Value |
| --- | --- |
| Brand name | Apex |
| Manufacturer name | Apex |
| Manufacturer | Apex, APEX |
| CategoryId | 11952 |
| CategoryIdL1 | 10 |
| CategoryIdL2 | 4423 |
| CategoryIdL3 | 11952 |
| CategoryL1 | Tools & Machining |
| CategoryL2 | Hand Tools |
| CategoryL3 | Sockets & Ratchets |
| CategoryL4 | Socket Extensions |
| DimensionUnit | inch |
| GraingerSku | 33N715 |
| UPC | None |
| UnitOfMeasure | EA |
| Weight | 0.12, 1.00 |
| WeightUnit | lbs |
| cali_prop65_orglabel | False |
| cali_prop65_whtlabel | False |
| countryOfOrigin | US |
| height | 1 |
| jsonUrlData | 924526ffbdad25e5923b |
| length | 1.5 |
| moq | 1 |
| MPN | EX-503 |
| multiple | 1 |
| qtyInStock | 0 |
| qtyInStockOverride | Drop Ship |
| SKU | G0587721 |
| snippet | Extension 1/2M-3/8F |
| tierMinQty1 | 1 |
| tierPrice1 | 21.39 |
| url | https://www.zoro.com/apex-extension-12m-38f-ex-503/i/G0587721/ |
| width | 1 |
| Part Number | EX-503 |
| Product Group | BISS |
| Output Drive Size | 3/8" F x 1/2" M |
| SAE or Metric | SAE |
| Item | Adapter |
| Output Drive Type | Square |
| Number of Points | 4, 4 |
| Package Quantity | 1 |
| ASIN | B00C3IB380 |
| Amount | 31.99, 32.99, 36.99 |
| Asin | B0025PLH14, B00C3IB380 |
| Binding | Misc. |
| Brand | APEX, APEX LEGENDS, Apex |
| Case | 1 |
| Cat | Industrial & Scientific, Tools & Home Improvement |
| CatId | 16310091, 228013 |
| CatTree | 16310091, 16310161, 228013 |
| CurrencyCode | USD |
| Feature | <b>Price For:</b> Each <b>Country of Origin (subject to change)</b>: United States |
| Height | 1.00, 50 |
| IsDeadAsin | True |
| Label | APEX, Apex |
| Length | 1.50 |
| Man | APEX, Apex |
| Model | EX-503 |
| NumberOfItems | 1 |

## Distributor availability

| Distributor | SKU | Price (USD) | Qty | Stock | MOQ |
| --- | --- | --- | --- | --- | --- |
| Zoro | G0587721 | 21.39 | 1 | None | 1 |
| toolfetch.com | 071-EX-503 | 31.07 | 1 | None | 1 |
| bscsource.com | EX503 | 23.09 | 1 | None | 1 |
| Guardian | 06699128 |  |  | None | 1 |
| Pemro | APX-2459 | 21.96 | 1 | None | 1 |
| National Supply Network | 06699128 | 27.95 | 1 | None | 1 |
| imsbolt.com | EX-503 | 26.74 | 1 | None | 1 |
| National Supply Network | 6699128 | 31.44 | 1 | None | 1 |

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Structured data: `/python/html6/product/500/204000000/204028500/part_--EX503---Apex--117e22f337.json`  
Search API: https://www.dataalchemy.com/api/  
MCP server: https://www.dataalchemy.com/mcp