{"product_id":"atb-m3000c-step-box-c-frame-mounting-kit-steel-bolt-on","title":"ATB M3000C Step Box C-Frame Mounting Kit, Steel Bolt-On","description":"\u003cp\u003eThe ATB M3000C is the bolt-on kit for mounting an ATB SB step box and steps to a C-frame truck. Four 1\/2\" x 2\" Grade 8 bolts pass through the back of the box and the frame rail, with rubber strips between box and frame. The steel parts carry a zinc epoxy primer and a baked powder topcoat.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat's Included:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eFour 1\/2\" x 2\" Grade 8 bolts\u003c\/li\u003e\n\u003cli\u003eFour 1\/2\" flat washers\u003c\/li\u003e\n\u003cli\u003eFour 1\/2\" lock nuts\u003c\/li\u003e\n\u003cli\u003eTwo 3\" x 12\" rubber strips\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eBolt-On C-Frame Kit\u003c\/strong\u003e\u003cbr\u003eThe M3000C bolts an ATB SB step box to a C-frame truck through the back of the box, using the box's internal mounting brackets.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003ePrimer and Powder Coat\u003c\/strong\u003e\u003cbr\u003eThe steel parts carry a zinc epoxy primer under a baked MR powder topcoat.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eGrade 8 Bolts\u003c\/strong\u003e\u003cbr\u003eFour 1\/2\" x 2\" Grade 8 bolts with 1\/2\" flat washers and lock nuts hold the box to the frame.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eRubber Strips\u003c\/strong\u003e\u003cbr\u003eTwo 3\" x 12\" rubber strips go between the box and the frame.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eLoad Rating\u003c\/strong\u003e\u003cbr\u003eATB's product page lists the kit for step box and steps installs up to 300 lbs.; its 2026 catalog and install sheet rate it at 150 lbs. max of cargo, and above that ATB points to its M2000 or M2100 L-brackets.\u003c\/p\u003e\n\u003ch3\u003eFitment \u0026amp; Compatibility\u003c\/h3\u003e\u003cdiv style=\"background:#faf7f7;border-left:4px solid #ba232a;border-radius:0 8px 8px 0;padding:14px 16px;margin:12px 0;\"\u003e\n\u003cp style=\"margin:0 0 6px;\"\u003eHow to choose: the M3000C bolts through the frame web and needs four 9\/16\" holes in the frame. If you would rather not drill the frame, ATB's M3000H and M3001H hook kits hang the box instead.\u003c\/p\u003e\n\u003cp style=\"margin:0 0 6px;\"\u003eFor more than 150 lbs. of cargo, ATB recommends its M2000 or M2100 L-brackets.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cp\u003e\u003cb\u003eFits:\u003c\/b\u003e ATB SB step boxes on C-frame trucks (bolt-through mount)\u003c\/p\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eBrand:\u003c\/b\u003e ATB\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003ePart Number:\u003c\/b\u003e M3000C\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eType:\u003c\/b\u003e Step box C-frame mounting kit\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eMaterial:\u003c\/b\u003e Steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eFinish:\u003c\/b\u003e Zinc epoxy primer, black MR powder topcoat\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eBolt size:\u003c\/b\u003e 1\/2\"\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eWeight:\u003c\/b\u003e 2 lbs.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eMade in:\u003c\/b\u003e USA\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eInstallation\u003c\/h3\u003e\n\u003cp\u003e\u003cb\u003eTime:\u003c\/b\u003e About 1.5 hours · \u003cb\u003eWhat's involved:\u003c\/b\u003e You drill four 9\/16\" holes in the back of the step box and four in the truck frame, then bolt through with rubber strips between. · \u003cb\u003eTools:\u003c\/b\u003e 3\/4\" ratchet wrench; 3\/4\" wrench; Tape measure; Drill with 9\/16\" or 11\/16\" bit; Utility knife; Blocks\u003c\/p\u003e\n\u003cp\u003eHere's the short version. Follow ATB's install sheet (below) for your truck's exact positions and hardware.\u003c\/p\u003e\n\u003col\u003e\n\u003cli\u003eCheck all parts against the parts list and make sure there is room to mount the box.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eSet the step box on the frame to confirm it fits there.\u003c\/b\u003e The box is not predrilled because frame hole patterns vary.\u003c\/li\u003e\n\u003cli\u003eRemove the box and drill four 9\/16\" holes in the back of the box, laid out as on ATB's M3000C drawing.\u003c\/li\u003e\n\u003cli\u003ePut the box back, mark the holes onto the frame, then remove the box and drill four 9\/16\" holes in the frame (follow the truck maker's frame-drilling guidance).\u003c\/li\u003e\n\u003cli\u003eApply the 3\" rubber strip to the box, cut the bolt holes in it with a utility knife and set the box back on the frame.\u003c\/li\u003e\n\u003cli\u003eInsert the bolts with washers, put a flat washer under each lock nut and tighten all nuts securely.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003ch3\u003eResources\u003c\/h3\u003e\u003cul\u003e\u003cli\u003e\n\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0805\/4784\/0244\/files\/atb-sb-step-installation-instructions.pdf?v=1793725753\" target=\"_blank\" rel=\"noopener\"\u003eATB ATB-SB-STEP installation sheet (PDF)\u003c\/a\u003e, ATB's own step-by-step guide.\u003c\/li\u003e\u003c\/ul\u003e\n\u003ch3\u003eWarranty, Shipping \u0026amp; Returns\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eWarranty.\u003c\/strong\u003e ATB covers its standard truck boxes with a 60-month (5-year) limited warranty for the original purchaser; it is not transferable.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eFor a warranty claim, contact us with your order number and photos and we will work it through with ATB.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eShipping.\u003c\/strong\u003e Ships by freight from the ATB factory in Blanchard, ND; lift-gate delivery available.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eAlaska, Hawaii and Canada: contact us for a freight quote before you order.\u003c\/li\u003e\n\u003cli\u003eWe email your tracking details as soon as it ships.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eInspect on delivery.\u003c\/strong\u003e Check the box when the freight arrives, before the driver leaves: look over the lids, doors, corners and welds for dents, scratches or shipping damage. Note any damage on the delivery receipt and send us photos. Check it as soon as it arrives.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eLook for crushed ends, punctures or tears in the carton.\u003c\/li\u003e\n\u003cli\u003eIf something looks wrong, take photos of the box and the parts (and if a driver asks you to sign, note the damage on the receipt).\u003c\/li\u003e\n\u003cli\u003eOpen the box and check the parts against the parts list before you install.\u003c\/li\u003e\n\u003cli\u003eEmail \u003ca href=\"mailto:support@prestigetruck.com\"\u003esupport@prestigetruck.com\u003c\/a\u003e right away with your order number, a short note and photos. We send a replacement or a full refund at no cost to you.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003e30-day returns.\u003c\/strong\u003e Return it within 30 days of delivery, unused, in the original packaging, with proof of purchase.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eEmail \u003ca href=\"mailto:support@prestigetruck.com\"\u003esupport@prestigetruck.com\u003c\/a\u003e with your order number. We reply within 1-2 business days with instructions.\u003c\/li\u003e\n\u003cli\u003eDamaged, defective or wrong item: we send a prepaid label or arrange a pickup.\u003c\/li\u003e\n\u003cli\u003eChanged your mind: you pay return shipping. No restocking fee.\u003c\/li\u003e\n\u003cli\u003eRefunds go back to your original payment method within 7 business days of approval. See our \u003ca href=\"https:\/\/prestigetruck.com\/policies\/refund-policy\"\u003ereturns policy\u003c\/a\u003e.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eAbout ATB\u003c\/h3\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:24px;align-items:flex-start;margin:6px 0 4px;\"\u003e\n\u003cdiv style=\"flex:0 0 150px;max-width:150px;border:2px solid #14161a;padding:12px 8px;text-align:center;font:700 22px\/1 Rajdhani,'Arial Narrow',sans-serif;color:#b3121f;\"\u003eATB\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 340px;min-width:240px;\"\u003e\u003cp\u003eAmerican Truckboxes (ATB) builds aluminum and steel truck boxes, tanks and storage in Blanchard, North Dakota, and has done so for more than 25 years, by its own account. Its range covers pickup crossover, side-mount, chest and drawer boxes, service-truck boxes and packs, fuel tanks, and heavy-truck and trailer boxes.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background:#faf7f7;border-left:4px solid #b3121f;border-radius:0 8px 8px 0;padding:14px 16px;margin:16px 0 0;\"\u003e\u003cp style=\"margin:0;\"\u003e\u003cstrong\u003eAuthorized ATB dealer.\u003c\/strong\u003e Prestige Truck is an authorized ATB dealer: every box on this page is built by ATB to the part number shown.\u003c\/p\u003e\u003c\/div\u003e","brand":"American Truckboxes","offers":[{"title":"Default Title","offer_id":68033866629364,"sku":"M3000C","price":23.25,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0805\/4784\/0244\/files\/atb-tb39143-tb-product-37099.jpg?v=1793728239","url":"https:\/\/prestigetruck.com\/products\/atb-m3000c-step-box-c-frame-mounting-kit-steel-bolt-on","provider":"Prestige Truck","version":"1.0","type":"link"}