# 5/16 in Tip, Socket Bit, SAE 3/8 in Drive

**Manufacturer:** Proto  
**MPN:** `J4990R-5/16`

## Specifications

| Attribute | Value |
| --- | --- |
| Brand name | Proto |
| Manufacturer name | Proto |
| Manufacturer | Proto, PROTO |
| CategoryId | 11956 |
| CategoryIdL1 | 10 |
| CategoryIdL2 | 10 |
| CategoryIdL3 | 4423 |
| CategoryIdL4 | 11956 |
| CategoryL1 | Tools & Machining |
| CategoryL2 | Hand Tools |
| CategoryL3 | Sockets & Ratchets |
| CategoryL4 | Bit Sockets |
| DimensionUnit | inch |
| GraingerSku | 56JT33 |
| Extra Product Name | 5/16 in Tip, Socket Bit, SAE 3/8 in Drive |
| UPC | 662679185886 |
| UnitOfMeasure | EA |
| Weight | 0.15 |
| WeightUnit | lbs |
| cali_prop65_orglabel | False |
| cali_prop65_whtlabel | False |
| countryOfOrigin | TW |
| height | 0.8 |
| jsonUrlData | 924526ffbdad25e5923b |
| length | 3 |
| moq | 1 |
| MPN | J4990R-5/16 |
| multiple | 1 |
| qtyInStock | 64 |
| qtyInStockOverride | -2 |
| SKU | G4388565 |
| tierMinQty1 | 1 |
| tierPrice1 | 19.36 |
| url | https://www.zoro.com/proto-516-in-tip-socket-bit-sae-38-in-drive-j4990r-516/i/G4388565/ |
| width | 2 |
| Drive Size | 3/8 in |
| Overall Length | 2 3/4 in |
| Tip Size | 5/16 in |
| Insert Length | Not Found |
| SAE or Metric | SAE |
| Number of Points | 6 |
| Measurement Type | SAE |
| Material | Alloy Steel |
| Item | Socket Bit |
| Finish | Chrome |
| Bit Style | Hex |
| Features | Anti-Slip, Bi-Directional, Precision Machined for Use on Standard or Compromised Hex Fasteners |
| Impact Rated | No |
| Standards | ANSI |
| Replaceable Insert | No |
| Tip Style | Hex |
| Insulated | No |
| ASIN | B08XNSFMKP |
| AdultProduct | False |
| Asin | B08XNSFMKP |
| Autographed | False |
| Batteries_required | False |
| Binding | Misc. |
| Brand | Proto |
| Bullet_point | Hand Tools, Made in: Taiwan, Manufacturer: Proto |

## Distributor availability

| Distributor | SKU | Price (USD) | Qty | Stock | MOQ |
| --- | --- | --- | --- | --- | --- |
| Zoro | G4388565 | 19.36 | 1 | 64 | 1 |
| Grainger | 56JT33 |  |  | None | 1 |

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Structured data: `/python/html6/product/500/500000/805500/part_--J4990R516---Proto--eeb29cb28d.json`  
Search API: https://www.dataalchemy.com/api/  
MCP server: https://www.dataalchemy.com/mcp