# Proto

**Manufacturer:** Proto  
**MPN:** `J378`

## Specifications

| Attribute | Value |
| --- | --- |
| Brand name | Proto |
| Manufacturer name | Proto |
| Manufacturer | Proto, Stanley Proto |
| DimensionUnit | inch |
| GraingerSku | 3R325 |
| Extra Product Name | Proto |
| UPC | 662679031718 |
| UnitOfMeasure | EA |
| Weight | 0.4, 0.48, 0.55 |
| WeightUnit | lbs |
| cali_prop65_message | WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov |
| cali_prop65_orglabel | True |
| cali_prop65_warnmsgscenario | 7 |
| cali_prop65_whtlabel | True |
| countryOfOrigin | US |
| height | 0.8 |
| jsonUrlData | 924526ffbdad25e5923b |
| length | 9.3 |
| moq | 1 |
| MPN | J378 |
| multiple | 1 |
| qtyInStock | 67 |
| qtyInStockOverride | -2 |
| SKU | G7571471 |
| tierMinQty1 | 1 |
| tierPrice1 | 34.99 |
| url | https://www.zoro.com/proto-retaining-ring-pliers-0090in-tip-45-deg-j378/i/G7571471/ |
| width | 2.7 |
| EAN | 640024963945 |
| Part Number | J378 |
| Model | J378 |
| Product Group | Home Improvement |
| Features | Use With Either External or Internal Retaining Rings, Converts From Internal to External or Vice Versa, When Pivot Screw is Moved to Adjacent Tapped Hole |
| Material | Carbon Steel, Blend |
| Overall Length | 9 in |
| Plier Item | Retaining Ring Pliers - Convertible |
| Number of Pieces | 1 |
| Plier Product Group | Pliers |
| Handle Color | Red |
| Tip Dia | 0.09 in |
| For Shaft Dia | 1-1/2 in to 1-3/4 in |
| For Bore Dia | 1-13/16 in to 3 in |
| Item | Retaining Ring Plier |
| Standards | ASME B107.500-2010 |
| Spring Return | No |
| Tip Type | Fixed |
| Handle Design | Cushion Grip |
| Tip Angle | 45 Degrees |
| Plier Style | Convertible |
| For Shaft Diameter Range | 1 1/2 in to 3 1/2 in |
| Grip Style | Standard Cushion |
| For Ring Type | External, Internal |
| Tip Diameter | 0.09 in |
| Overall Length Range | 9 - 11 in |
| For Minimum Bore Diameter | 1 13/16 in |
| For Use With | Retaining Rings |
| Handle Style | Cushion Grip |
| For Maximum Shaft Diameter | 3 1/2 in |
| Jaw Opening Type | Manual |
| Conversion Mechanism | Pivot Screw |

## Distributor availability

| Distributor | SKU | Price (USD) | Qty | Stock | MOQ |
| --- | --- | --- | --- | --- | --- |
| Zoro | G7571471 | 34.99 | 1 | 67 | 1 |
| Grainger | 3R325 |  |  | None | 1 |
| ToolUp.com | PROTO J378 | 34.13 | 1 | None | 1 |
| Resourceful Supply | J378 | 21.28 | 1 | 1 | 1 |
| wylaco.com | J378 |  |  | None | 1 |
| motionindustries.com | 01153678 | 34.96 | 1 | None | 1 |
| Raptor Supplies | AD2KVX | 65.141505 | 1 | None | 1 |
| Applied Industrial | 105852464 |  |  | None | 1 |
| bscsource.com | 08100133 | 44.19 | 1 | None | 1 |
| National Supply Network | B320942 |  |  | None | 1 |
| sustainablesupply.com | C1290373 | 48.06 | 1 | None | 1 |
| Guardian | 08100133 | 55.19 | 1 | None | 1 |
| Circle C Supply | PTO02314 | 31.0 | 1 | None | 1 |
| kscdirect.com | BLA J378 |  |  | None | 1 |
| stellarindustrial.com | PROTO 378 |  |  | None | 1 |
| directools.com | J378 | 32.18 | 1 | None | 1 |
| Turner Supply | 267903171 |  |  | None | 1 |
| grainger.ca | PRT378 | 58.26770568 | 1 | None | 1 |
| bhid.com | PROTO J378 | 43.668 | 1 | None | 1 |
| toolshackweb.com | PRO378 | 38.41 | 1 | None | 1 |
| National Supply Network | 08100133 | 48.8 | 1 | None | 1 |

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Structured data: `/python/html6/product/500/158000000/158261500/part_--J378---Proto--64c282a9c6.json`  
Search API: https://www.dataalchemy.com/api/  
MCP server: https://www.dataalchemy.com/mcp