# Socket Bit, Insert Length 1 5/8 in, Replaceable Insert No, Metric, Tip Size 4 mm, Tip Style Hex, Overall Length 2 23/32 in, Drive Size 3/8 in, Socket Depth Standard, Alloy Steel

**Manufacturer:** Proto  
**MPN:** `J4990-4M-TT`

The Proto J4990-4M-TT is a Tether-Ready 3/8-Inch Hex Bit Socket with a 4mm size. It is a 3/8-inch hex bit socket designed with a tether-ready feature, allowing for secure attachment to a tether. The specifications for this product are as follows: it has a 4mm size and is manufactured by Proto.

## Specifications

| Attribute | Value |
| --- | --- |
| Brand name | Proto |
| Manufacturer name | Proto |
| Manufacturer | Proto, Stanley |
| CategoryId | 11956 |
| CategoryIdL1 | 10 |
| CategoryIdL2 | 4423 |
| CategoryIdL3 | 11956 |
| CategoryL1 | Tools & Machining |
| CategoryL2 | Hand Tools |
| CategoryL3 | Sockets & Ratchets |
| CategoryL4 | Bit Sockets |
| DimensionUnit | inch |
| GTIN | 662679117719 |
| GraingerSku | 24AJ54 |
| UPC | 662679117719 |
| UnitOfMeasure | EA |
| Weight | 0.11, 0.01, 0.3499999999999999 |
| WeightUnit | lbs |
| cali_prop65_orglabel | False |
| cali_prop65_whtlabel | False |
| countryOfOrigin | US |
| height | 0.5 |
| jsonUrlData | 924526ffbdad25e5923b |
| length | 2.7 |
| moq | 1 |
| MPN | J4990-4M-TT |
| multiple | 1 |
| qtyInStock | 1 |
| qtyInStockOverride | 1 |
| qtySource | qtyInStockOverride |
| SKU | G6588443 |
| snippet | Socket Bit, Insert Length 1 5/8 in, Replaceable Insert No, Metric, Tip Size 4 mm, Tip Style Hex, Overall Length 2 23/32 in, Drive Size 3/8 in, Socket Depth Standard, Alloy Steel |
| tierMinQty1 | 1 |
| tierPrice1 | 22.65 |
| url | https://www.zoro.com/proto-4-mm-tip-socket-bit-metric-38-in-drive-j4990-4m-tt/i/G6588443/ |
| width | 0.5 |
| EAN | 662679117719 |
| Part Number | J4990-4M-TT |
| Model | J4990-4M-TT |
| Product Group | Home Improvement |
| Drive Size | 3/8 in |
| Overall Length | 2 23/32 in |
| Size | 4mm, One Size |
| Tip Size | 4 mm |
| Socket Depth | Standard |
| Insert Length | 1 5/8 in |
| Socket Type | Hex Bit |
| SAE or Metric | Metric |
| Number of Points | 6 |
| Measurement Type | Metric |
| Material | Alloy Steel, Blend |
| Item | Socket Bit |
| Finish | Chrome |
| Category Type | Socket Bits |
| Bit Style | Hex |
| Drive Type | Square |
| Impact Rated | No |
| Insulated | No |
| Replaceable Insert | No |
| Tip Style | Hex |

## Distributor availability

| Distributor | SKU | Price (USD) | Qty | Stock | MOQ |
| --- | --- | --- | --- | --- | --- |
| Zoro | G6588443 | 22.65 | 1 | 1 | 1 |
| Grainger | 24AJ54 |  |  | None | 1 |
| ToolUp.com | PROTO J4990-4M-TT | 26.79 | 1 | None | 1 |
| motionindustries.com | 05818274 | 28.06 | 1 | None | 1 |
| Raptor Supplies | AF8AGV | 45.6884415 | 1 | None | 1 |
| AmazonSC | B00H1NFZAE | 33.84 | 1 | None | 1 |
| Applied Industrial | 110641683 |  |  | None | 1 |
| bscsource.com | J49904MTT | 29.69 | 1 | None | 1 |
| Guardian | 62800982 | 36.67 | 1 | None | 1 |
| grainger.ca | PRT49904MTT | 41.71932888 | 1 | None | 1 |
| stellarindustrial.com | PROTO 4990-4M-TT |  |  | None | 1 |
| Turner Supply | 267911771 |  |  | None | 1 |
| homeessentialsdirect.com | J4990-4M-TT | 23.43 | 1 | None | 1 |
| National Supply Network | 62800982 | 30.61 | 1 | None | 1 |
| imsbolt.com | J4990-4M-TT | 42.51 | 1 | None | 1 |

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Structured data: `/python/html6/product/500/242500000/242810000/part_--J49904MTT---Proto--76e1bb5dc6.json`  
Search API: https://www.dataalchemy.com/api/  
MCP server: https://www.dataalchemy.com/mcp