{"v":"2.0","page_type":"product","title":"Hamilton","breadcrumbs":[{"label":"Home","href":"/python/html6/index.html"},{"label":"Brands","href":"/python/html6/menu_brand_index/menu_brand_index_brands_87101ba214.html"},{"label":"Hamilton","href":"/python/html6/menu_brand_products/1000/72000/menu_brand_products_Hamilton_1_e68c6b5f5c.html"},{"label":"S-7521-SPRT-4SL","href":null}],"content":{"product":{"mpn":"S-7521-SPRT-4SL","manufacturer":"Hamilton","brand":"Hamilton","brand_url":"/python/html6/menu_brand_products/1000/72000/menu_brand_products_Hamilton_1_e68c6b5f5c.html","title":"Hamilton","description":"","attributes":[{"name":"Brand name","values":[{"value":"Hamilton","url":"/python/html6/menu_attr_pair/1000/202000000/202296000/menu_attr_pair_Brandname_Hamilton_1_5f8cd45a7c.html"}],"name_url":"/python/html6/menu_attr_pair/1000/202000000/202296000/menu_attr_pair_Brandname_Hamilton_1_5f8cd45a7c.html"},{"name":"Manufacturer name","values":[{"value":"Hamilton","url":"/python/html6/menu_attr_pair/1000/185000000/185328000/menu_attr_pair_Manufacturername_Hamilton_1_cd1e24d2a8.html"}],"name_url":"/python/html6/menu_attr_pair/1000/185000000/185328000/menu_attr_pair_Manufacturername_Hamilton_1_cd1e24d2a8.html"},{"name":"Manufacturer","values":[{"value":"Hamilton","url":"/python/html6/menu_attr_pair/1000/45000000/45445000/menu_attr_pair_Manufacturer_Hamilton_1_63a9845d1a.html"}],"name_url":"/python/html6/menu_attr_pair/1000/45000000/45445000/menu_attr_pair_Manufacturer_Hamilton_1_63a9845d1a.html"},{"name":"DimensionUnit","values":[{"value":"inch","url":"/python/html6/menu_attr_pair/1000/10000000/10300000/menu_attr_pair_DimensionUnit_inch_1_f16129611b.html"}],"name_url":"/python/html6/menu_attr_pair/1000/10000000/10300000/menu_attr_pair_DimensionUnit_inch_1_f16129611b.html"},{"name":"GraingerSku","values":[{"value":"S-7521-SPRT-4SL","url":"/python/html6/menu_attr_pair/1000/184000000/184748000/menu_attr_pair_GraingerSku_S7521SPRT4SL_1_4827451e6b.html"}],"name_url":"/python/html6/menu_attr_pair/1000/184000000/184748000/menu_attr_pair_GraingerSku_S7521SPRT4SL_1_4827451e6b.html"},{"name":"Extra Product Name","values":[{"value":"Hamilton","url":"/python/html6/menu_attr_pair/1000/100000000/100797000/menu_attr_pair_ExtraProductName_Hamilton_1_647f143581.html"}],"name_url":"/python/html6/menu_attr_pair/1000/100000000/100797000/menu_attr_pair_ExtraProductName_Hamilton_1_647f143581.html"},{"name":"UnitOfMeasure","values":[{"value":"EA","url":"/python/html6/menu_attr_pair/1000/176000000/176420000/menu_attr_pair_UnitOfMeasure_EA_1_f926bb2044.html"}],"name_url":"/python/html6/menu_attr_pair/1000/176000000/176420000/menu_attr_pair_UnitOfMeasure_EA_1_f926bb2044.html"},{"name":"Weight","values":[{"value":"106","url":"/python/html6/menu_attr_pair/1000/199000000/199005000/menu_attr_pair_Weight_106_1_9652d6031d.html"}],"name_url":"/python/html6/menu_attr_pair/1000/199000000/199005000/menu_attr_pair_Weight_106_1_9652d6031d.html"},{"name":"WeightUnit","values":[{"value":"lbs","url":"/python/html6/menu_attr_pair/1000/60000000/60642000/menu_attr_pair_WeightUnit_lbs_1_dce479c2aa.html"}],"name_url":"/python/html6/menu_attr_pair/1000/60000000/60642000/menu_attr_pair_WeightUnit_lbs_1_dce479c2aa.html"},{"name":"cali_prop65_orglabel","values":[{"value":"False","url":"/python/html6/menu_attr_pair/1000/208000000/208722000/menu_attr_pair_caliprop65orglabel_False_1_60e58a876a.html"}],"name_url":"/python/html6/menu_attr_pair/1000/208000000/208722000/menu_attr_pair_caliprop65orglabel_False_1_60e58a876a.html"},{"name":"cali_prop65_whtlabel","values":[{"value":"False","url":"/python/html6/menu_attr_pair/1000/28000000/28565000/menu_attr_pair_caliprop65whtlabel_False_1_02fc99d251.html"}],"name_url":"/python/html6/menu_attr_pair/1000/28000000/28565000/menu_attr_pair_caliprop65whtlabel_False_1_02fc99d251.html"},{"name":"countryOfOrigin","values":[{"value":"US","url":"/python/html6/menu_attr_pair/1000/100000000/100875000/menu_attr_pair_countryOfOrigin_US_1_37c5174dcd.html"}],"name_url":"/python/html6/menu_attr_pair/1000/100000000/100875000/menu_attr_pair_countryOfOrigin_US_1_37c5174dcd.html"},{"name":"extendedLead","values":[{"value":"20","url":"/python/html6/menu_attr_pair/1000/155000000/155757000/menu_attr_pair_extendedLead_20_1_5c33e1b204.html"}],"name_url":"/python/html6/menu_attr_pair/1000/155000000/155757000/menu_attr_pair_extendedLead_20_1_5c33e1b204.html"},{"name":"extendedQty","values":[{"value":"-2","url":"/python/html6/menu_attr_pair/1000/223000000/223037000/menu_attr_pair_extendedQty_2_1_a3f9614586.html"}],"name_url":"/python/html6/menu_attr_pair/1000/223000000/223037000/menu_attr_pair_extendedQty_2_1_a3f9614586.html"},{"name":"height","values":[{"value":"1","url":"/python/html6/menu_attr_pair/1000/24000000/24391000/menu_attr_pair_height_1_1_81742ec654.html"}],"name_url":"/python/html6/menu_attr_pair/1000/24000000/24391000/menu_attr_pair_height_1_1_81742ec654.html"},{"name":"jsonUrlData","values":[{"value":"924526ffbdad25e5923b","url":"/python/html6/menu_attr_pair/1000/175000000/175382000/menu_attr_pair_jsonUrlData_924526ffbdad25e5923b_1_0a1fe0260a.html"}],"name_url":"/python/html6/menu_attr_pair/1000/175000000/175382000/menu_attr_pair_jsonUrlData_924526ffbdad25e5923b_1_0a1fe0260a.html"},{"name":"length","values":[{"value":"1","url":"/python/html6/menu_attr_pair/1000/35000000/35518000/menu_attr_pair_length_1_1_821df9a39b.html"}],"name_url":"/python/html6/menu_attr_pair/1000/35000000/35518000/menu_attr_pair_length_1_1_821df9a39b.html"},{"name":"moq","values":[{"value":"1","url":"/python/html6/menu_attr_pair/1000/164000000/164262000/menu_attr_pair_moq_1_1_29ca727a89.html"}],"name_url":"/python/html6/menu_attr_pair/1000/164000000/164262000/menu_attr_pair_moq_1_1_29ca727a89.html"},{"name":"MPN","values":[{"value":"S-7521-SPRT-4SL","url":"/python/html6/menu_attr_pair/1000/100000000/100060000/menu_attr_pair_MPN_S7521SPRT4SL_1_8bdbd6a55a.html"}],"name_url":"/python/html6/menu_attr_pair/1000/100000000/100060000/menu_attr_pair_MPN_S7521SPRT4SL_1_8bdbd6a55a.html"},{"name":"multiple","values":[{"value":"1","url":"/python/html6/menu_attr_pair/1000/257000000/257999000/menu_attr_pair_multiple_1_1_2f60c1bab8.html"}],"name_url":"/python/html6/menu_attr_pair/1000/257000000/257999000/menu_attr_pair_multiple_1_1_2f60c1bab8.html"},{"name":"qtyInStock","values":[{"value":"0","url":"/python/html6/menu_attr_pair/1000/119000000/119332000/menu_attr_pair_qtyInStock_0_1_38510c9e21.html"}],"name_url":"/python/html6/menu_attr_pair/1000/119000000/119332000/menu_attr_pair_qtyInStock_0_1_38510c9e21.html"},{"name":"qtyInStockOverride","values":[{"value":"Drop Ship","url":"/python/html6/menu_attr_pair/1000/184000000/184534000/menu_attr_pair_qtyInStockOverride_DropShip_1_d4b475040e.html"}],"name_url":"/python/html6/menu_attr_pair/1000/184000000/184534000/menu_attr_pair_qtyInStockOverride_DropShip_1_d4b475040e.html"},{"name":"SKU","values":[{"value":"G3711222","url":"/python/html6/menu_attr_pair/1000/22000000/22449000/menu_attr_pair_SKU_G3711222_1_dc7024fb6d.html"}],"name_url":"/python/html6/menu_attr_pair/1000/22000000/22449000/menu_attr_pair_SKU_G3711222_1_dc7024fb6d.html"},{"name":"tierMinQty1","values":[{"value":"1","url":"/python/html6/menu_attr_pair/1000/226000000/226987000/menu_attr_pair_tierMinQty1_1_1_974840705d.html"}],"name_url":"/python/html6/menu_attr_pair/1000/226000000/226987000/menu_attr_pair_tierMinQty1_1_1_974840705d.html"},{"name":"tierPrice1","values":[{"value":"1455.04","url":"/python/html6/menu_attr_pair/1000/257000000/257505000/menu_attr_pair_tierPrice1_145504_1_90b130d3d2.html"}],"name_url":"/python/html6/menu_attr_pair/1000/257000000/257505000/menu_attr_pair_tierPrice1_145504_1_90b130d3d2.html"},{"name":"url","values":[{"value":"https://www.zoro.com/hamilton-ground-support-swivel-caster-21-heavy-duty-solid-pneumatic-tire-swivel-lock-s-7521-sprt-4sl/i/G3711222/","url":"/python/html6/menu_attr_pair/1000/239000000/239583000/menu_attr_pair_url_httpswwwzorocomhamiltongroundsupportswivel_1_59d1873a70.html"}],"name_url":"/python/html6/menu_attr_pair/1000/239000000/239583000/menu_attr_pair_url_httpswwwzorocomhamiltongroundsupportswivel_1_59d1873a70.html"},{"name":"width","values":[{"value":"1","url":"/python/html6/menu_attr_pair/1000/255000000/255324000/menu_attr_pair_width_1_1_bf37f24e69.html"}],"name_url":"/python/html6/menu_attr_pair/1000/255000000/255324000/menu_attr_pair_width_1_1_bf37f24e69.html"},{"name":"Caster Wheel Shape","values":[{"value":"Standard","url":"/python/html6/menu_attr_pair/1000/104000000/104134000/menu_attr_pair_CasterWheelShape_Standard_1_8c4274407f.html"}],"name_url":"/python/html6/menu_attr_pair/1000/104000000/104134000/menu_attr_pair_CasterWheelShape_Standard_1_8c4274407f.html"},{"name":"Caster Wheel/Tread Material","values":[{"value":"Solid Pneumatic","url":"/python/html6/menu_attr_pair/1000/215000000/215620000/menu_attr_pair_CasterWheelTreadMaterial_SolidPneumatic_1_5874927772.html"}],"name_url":"/python/html6/menu_attr_pair/1000/215000000/215620000/menu_attr_pair_CasterWheelTreadMaterial_SolidPneumatic_1_5874927772.html"},{"name":"Load Rating","values":[{"value":"2800","url":"/python/html6/menu_attr_pair/1000/253000000/253764000/menu_attr_pair_LoadRating_2800_1_fdf1285619.html"}],"name_url":"/python/html6/menu_attr_pair/1000/253000000/253764000/menu_attr_pair_LoadRating_2800_1_fdf1285619.html"},{"name":"Number of Wheels","values":[{"value":"1","url":"/python/html6/menu_attr_pair/1000/12000000/12512000/menu_attr_pair_NumberofWheels_1_1_19afa097aa.html"}],"name_url":"/python/html6/menu_attr_pair/1000/12000000/12512000/menu_attr_pair_NumberofWheels_1_1_19afa097aa.html"},{"name":"Wheel Dia","values":[{"value":"21","url":"/python/html6/menu_attr_pair/1000/100000000/100329000/menu_attr_pair_WheelDia_21_1_2b50eb9e02.html"}],"name_url":"/python/html6/menu_attr_pair/1000/100000000/100329000/menu_attr_pair_WheelDia_21_1_2b50eb9e02.html"},{"name":"Wheel Width","values":[{"value":"6.9","url":"/python/html6/menu_attr_pair/1000/43000000/43934000/menu_attr_pair_WheelWidth_69_1_6191687d2b.html"}],"name_url":"/python/html6/menu_attr_pair/1000/43000000/43934000/menu_attr_pair_WheelWidth_69_1_6191687d2b.html"},{"name":"Inside Bolt Hole Spacing","values":[{"value":"7 x 7","url":"/python/html6/menu_attr_pair/1000/130000000/130277000/menu_attr_pair_InsideBoltHoleSpacing_7x7_1_7dfda12bfb.html"}],"name_url":"/python/html6/menu_attr_pair/1000/130000000/130277000/menu_attr_pair_InsideBoltHoleSpacing_7x7_1_7dfda12bfb.html"},{"name":"Core Color","values":[{"value":"Black","url":"/python/html6/menu_attr_pair/1000/225000000/225596000/menu_attr_pair_CoreColor_Black_1_1dc81fe126.html"}],"name_url":"/python/html6/menu_attr_pair/1000/225000000/225596000/menu_attr_pair_CoreColor_Black_1_1dc81fe126.html"},{"name":"Caster Temp Range","values":[{"value":"-30 to 120 deg(F)","url":"/python/html6/menu_attr_pair/1000/48000000/48555000/menu_attr_pair_CasterTempRange_30to120degF_1_16ccfc3ef5.html"}],"name_url":"/python/html6/menu_attr_pair/1000/48000000/48555000/menu_attr_pair_CasterTempRange_30to120degF_1_16ccfc3ef5.html"},{"name":"Thread Guards","values":[{"value":"No","url":"/python/html6/menu_attr_pair/1000/172000000/172678000/menu_attr_pair_ThreadGuards_No_1_4cc03bceec.html"}],"name_url":"/python/html6/menu_attr_pair/1000/172000000/172678000/menu_attr_pair_ThreadGuards_No_1_4cc03bceec.html"},{"name":"Mounting Bolt Dia","values":[{"value":"0.625","url":"/python/html6/menu_attr_pair/1000/100000000/100373000/menu_attr_pair_MountingBoltDia_0625_1_3341490878.html"}],"name_url":"/python/html6/menu_attr_pair/1000/100000000/100373000/menu_attr_pair_MountingBoltDia_0625_1_3341490878.html"},{"name":"Caster Core Material","values":[{"value":"Steel","url":"/python/html6/menu_attr_pair/1000/107000000/107721000/menu_attr_pair_CasterCoreMaterial_Steel_1_aa80685428.html"}],"name_url":"/python/html6/menu_attr_pair/1000/107000000/107721000/menu_attr_pair_CasterCoreMaterial_Steel_1_aa80685428.html"},{"name":"Plate Size","values":[{"value":"8 1/2 x 8 1/2","url":"/python/html6/menu_attr_pair/1000/65000000/65230000/menu_attr_pair_PlateSize_812x812_1_ab7180b0be.html"}],"name_url":"/python/html6/menu_attr_pair/1000/65000000/65230000/menu_attr_pair_PlateSize_812x812_1_ab7180b0be.html"},{"name":"Caster Swivel Lock Type","values":[{"value":"4-Position","url":"/python/html6/menu_attr_pair/1000/104000000/104517000/menu_attr_pair_CasterSwivelLockType_4Position_1_c0920c4077.html"}],"name_url":"/python/html6/menu_attr_pair/1000/104000000/104517000/menu_attr_pair_CasterSwivelLockType_4Position_1_c0920c4077.html"},{"name":"Caster Product Group","values":[{"value":"Swivel Caster","url":"/python/html6/menu_attr_pair/1000/159000000/159495000/menu_attr_pair_CasterProductGroup_SwivelCaster_1_b65ac19cb8.html"}],"name_url":"/python/html6/menu_attr_pair/1000/159000000/159495000/menu_attr_pair_CasterProductGroup_SwivelCaster_1_b65ac19cb8.html"},{"name":"Item","values":[{"value":"Swivel Caster","url":"/python/html6/menu_attr_pair/1000/25000000/25505000/menu_attr_pair_Item_SwivelCaster_1_0c72354fcc.html"}],"name_url":"/python/html6/menu_attr_pair/1000/25000000/25505000/menu_attr_pair_Item_SwivelCaster_1_0c72354fcc.html"},{"name":"Non-Marking","values":[{"value":"No","url":"/python/html6/menu_attr_pair/1000/92000000/92115000/menu_attr_pair_NonMarking_No_1_53d0bb1774.html"}],"name_url":"/python/html6/menu_attr_pair/1000/92000000/92115000/menu_attr_pair_NonMarking_No_1_53d0bb1774.html"},{"name":"Frame Finish","values":[{"value":"Powder Coat","url":"/python/html6/menu_attr_pair/1000/136000000/136717000/menu_attr_pair_FrameFinish_PowderCoat_1_523a5ab924.html"}],"name_url":"/python/html6/menu_attr_pair/1000/136000000/136717000/menu_attr_pair_FrameFinish_PowderCoat_1_523a5ab924.html"},{"name":"Standards","values":[{"value":"ICWM","url":"/python/html6/menu_attr_pair/1000/214000000/214227000/menu_attr_pair_Standards_ICWM_1_c08d42553b.html"}],"name_url":"/python/html6/menu_attr_pair/1000/214000000/214227000/menu_attr_pair_Standards_ICWM_1_c08d42553b.html"},{"name":"Caster Plate Hole Pattern","values":[{"value":"D","url":"/python/html6/menu_attr_pair/1000/170000000/170101000/menu_attr_pair_CasterPlateHolePattern_D_1_fca8e41906.html"}],"name_url":"/python/html6/menu_attr_pair/1000/170000000/170101000/menu_attr_pair_CasterPlateHolePattern_D_1_fca8e41906.html"},{"name":"Caster Wheel Bearings","values":[{"value":"Tapered","url":"/python/html6/menu_attr_pair/1000/241000000/241814000/menu_attr_pair_CasterWheelBearings_Tapered_1_5e8a783722.html"}],"name_url":"/python/html6/menu_attr_pair/1000/241000000/241814000/menu_attr_pair_CasterWheelBearings_Tapered_1_5e8a783722.html"},{"name":"Replacement Wheel","values":[{"value":"W-2160-SPRT-1-1/4","url":"/python/html6/menu_attr_pair/1000/265000000/265427000/menu_attr_pair_ReplacementWheel_W2160SPRT114_1_887377a7f4.html"}],"name_url":"/python/html6/menu_attr_pair/1000/265000000/265427000/menu_attr_pair_ReplacementWheel_W2160SPRT114_1_887377a7f4.html"},{"name":"Caster Frame Material","values":[{"value":"Forged Steel","url":"/python/html6/menu_attr_pair/1000/75000000/75557000/menu_attr_pair_CasterFrameMaterial_ForgedSteel_1_bab37b33ba.html"}],"name_url":"/python/html6/menu_attr_pair/1000/75000000/75557000/menu_attr_pair_CasterFrameMaterial_ForgedSteel_1_bab37b33ba.html"},{"name":"Wheel/Tread Hardness Rating","values":[{"value":"Soft","url":"/python/html6/menu_attr_pair/1000/69000000/69856000/menu_attr_pair_WheelTreadHardnessRating_Soft_1_35d05d141c.html"}],"name_url":"/python/html6/menu_attr_pair/1000/69000000/69856000/menu_attr_pair_WheelTreadHardnessRating_Soft_1_35d05d141c.html"},{"name":"Number of Mounting Holes","values":[{"value":"4","url":"/python/html6/menu_attr_pair/1000/27000000/27899000/menu_attr_pair_NumberofMountingHoles_4_1_3048c55a2a.html"}],"name_url":"/python/html6/menu_attr_pair/1000/27000000/27899000/menu_attr_pair_NumberofMountingHoles_4_1_3048c55a2a.html"},{"name":"Mounting Height","values":[{"value":"24.5","url":"/python/html6/menu_attr_pair/1000/132000000/132763000/menu_attr_pair_MountingHeight_245_1_fa12a1a9e7.html"}],"name_url":"/python/html6/menu_attr_pair/1000/132000000/132763000/menu_attr_pair_MountingHeight_245_1_fa12a1a9e7.html"},{"name":"Wheel/Tread Color","values":[{"value":"Black","url":"/python/html6/menu_attr_pair/1000/237000000/237520000/menu_attr_pair_WheelTreadColor_Black_1_6d7635be32.html"}],"name_url":"/python/html6/menu_attr_pair/1000/237000000/237520000/menu_attr_pair_WheelTreadColor_Black_1_6d7635be32.html"},{"name":"Country of Origin (subject to change)","values":[{"value":"United States","url":"/python/html6/menu_attr_pair/1000/137000000/137132000/menu_attr_pair_CountryofOriginsubjecttochange_UnitedStates_1_a335bd87ef.html"}],"name_url":"/python/html6/menu_attr_pair/1000/137000000/137132000/menu_attr_pair_CountryofOriginsubjecttochange_UnitedStates_1_a335bd87ef.html"}],"images":[],"distributors":[{"name":"Zoro","sku":"G3711222","url":"https://www.zoro.com/hamilton-ground-support-swivel-caster-21-heavy-duty-solid-pneumatic-tire-swivel-lock-s-7521-sprt-4sl/i/G3711222/","pricing":[{"quantity":1,"price_usd":1455.04}],"stock":{"available":false,"quantity":null,"lead_time_days":null},"moq":1,"multiple":1,"image":"https://www.dataalchemy.com/python/getu/1312d194-8a97-4385-a84f-21ce86b2a3d1"},{"name":"Zoro","sku":"G9088088","url":"https://www.zoro.com/hamilton-swivel-caster-wsolid-pneumatic-tire-s-7521-sprt-4sl/i/G9088088/","pricing":[{"quantity":1,"price_usd":991.2}],"stock":{"available":false,"quantity":null,"lead_time_days":null},"moq":1,"multiple":1,"image":"https://www.dataalchemy.com/python/getu/1312d194-8a97-4385-a84f-21ce86b2a3d1"}],"amazon":{"available":false,"products":[]},"metadata":{"generated_date":"2026-09-16","last_updated":"2026-09-16","data_sources":["Zoro"],"completeness":0.75,"version":"1.2"}}},"pagination":null,"nav":{"home":"/python/html6/index.html","brands":"/python/html6/menu_brand_index/menu_brand_index_brands_87101ba214.html","parts":"/python/html6/menu_part_index/menu_part_index_parts_909e6bf0ca.html","attributes":"/python/html6/menu_attr_index/menu_attr_index_attributes_d7f67a250d.html"}}