# Hydraulic Quick Connect Hose Coupling, Socket, ST Series, Brass, Coupling Size 1/2 in, Male, Max. Working Pressure @ 70 F 2,200 psi, Max. Flow Rate 45.42 lpm

**Manufacturer:** Parker  
**MPN:** `BST-4M`

The Parker BST-4M is a non-valved hydraulic quick coupler with a 1/2 inch body and 1/2 inch NPT male port connection. It features a brass construction and is designed for use with Parker Series ST quick connect nipples in systems where media isolation is not required. The coupler is rated for a maximum pressure of 2200 PSI and is suitable for manual sleeve operation.

## Specifications

| Attribute | Value |
| --- | --- |
| Brand name | Parker |
| Manufacturer name | Parker |
| Manufacturer | Parker |
| CategoryId | 5403 |
| CategoryIdL1 | 32 |
| CategoryIdL2 | 10615 |
| CategoryIdL3 | 5403 |
| CategoryL1 | Power Transmission |
| CategoryL2 | Hydraulic Cylinders & Equipment |
| CategoryL3 | Hydraulic Hoses & Fittings |
| CategoryL4 | Hydraulic Quick Couplers |
| DimensionUnit | inch |
| GTIN | None |
| GraingerSku | 31A959 |
| UPC | None |
| UnitOfMeasure | EA |
| Weight | 0.35 |
| WeightUnit | lbs |
| cali_prop65_orglabel | False |
| cali_prop65_whtlabel | False |
| countryOfOrigin | US |
| height | 2 |
| jsonUrlData | 924526ffbdad25e5923b |
| length | 1.3 |
| moq | 1 |
| MPN | BST-4M |
| multiple | 1 |
| qtyInStock | 213 |
| qtyInStockOverride | -2 |
| SKU | G4666821 |
| snippet | Hydraulic Quick Connect Hose Coupling, Socket, ST Series, Brass, Coupling Size 1/2 in, Male, Max. Working Pressure @ 70 F 2,200 psi, Max. Flow Rate 45.42 lpm |
| tierMinQty1 | 1 |
| tierPrice1 | 34.05 |
| url | https://www.zoro.com/parker-hydraulic-quick-connect-hose-coupling-brass-body-sleeve-lock-12-14-thread-size-st-series-bst-4m/i/G4666821/ |
| width | 1.3 |
| Coupler Thread Size | 1/2"-14 |
| Coupler Body Size | 1/2" |
| Thread Size | 1/2"-14 |
| Length | 1-61/64" |
| Overall Length | 1 15/16 in |
| Max Outside Dia | 1 19/64 in |
| Coupling Size | 1/2 in |
| Item | Hydraulic Quick Connect Hose Coupling |
| Quick Coupler Type | Hydraulic Coupler Body |
| Coupler Interchange Type | ST |
| Connection Type | NPTF |
| Coupler Flow Rate | 12.0 gpm |
| Max Pressure | 2200 psi |
| Coupler Body Material | Brass |
| Sleeve Material | Brass |
| Coupler Finish | Plain |
| Series | ST |
| Body Material | Brass |
| Coupling Locking Type | Sleeve |
| Parker Interchange | BST-4M |
| For Use With | Parker ST Series |
| Seal Material | Nitrile |
| Includes | Sleeve Lock |
| Coupler Connection Type | FNPT |

## Distributor availability

| Distributor | SKU | Price (USD) | Qty | Stock | MOQ |
| --- | --- | --- | --- | --- | --- |
| Zoro | G4666821 | 34.05 | 1 | 213 | 1 |
| Grainger | 31A959 |  |  | None | 1 |
| FinditParts | 11014166 |  |  | None | 1 |
| Raptor Supplies | AC4XUN | 43.9230285 | 1 | None | 1 |
| AmazonTP | B078K6ZV98 | 65.34 | 1 | None | 1 |
| AmazonTP | B00BKADIM6 | 29.89 | 1 | None | 1 |
| Misumi USA | BST-4M |  |  | None | 1 |
| simsupply.com | ZO-G4666821 | 46.27 | 1 | 57 | 1 |
| MRO Stop | 644021561 | 22.74 | 1 | None | 1 |
| Airline Hydraulics | PARKER BST-4M | 30.03 | 1 | None | 1 |

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Structured data: `/python/html6/product/500/187500000/187904500/part_--BST4M---Parker--46699cd8fe.json`  
Search API: https://www.dataalchemy.com/api/  
MCP server: https://www.dataalchemy.com/mcp