diff --git a/src/components/stocks/BendingLotForm.tsx b/src/components/stocks/BendingLotForm.tsx
index 9de185ad..86637542 100644
--- a/src/components/stocks/BendingLotForm.tsx
+++ b/src/components/stocks/BendingLotForm.tsx
@@ -244,7 +244,7 @@ export function BendingLotForm({ initialData, isEditMode = false }: BendingLotFo
     if (initialData?.bendingLot) {
       const bl = initialData.bendingLot;
       return {
-        regDate: getInitialForm().regDate,
+        regDate: initialData.regDate || getInitialForm().regDate,
         prodCode: bl.prodCode || '',
         specCode: bl.specCode || '',
         lengthCode: bl.lengthCode || '',
@@ -375,22 +375,22 @@ export function BendingLotForm({ initialData, isEditMode = false }: BendingLotFo
   );
 
   // 저장
-  const handleSave = useCallback(async () => {
+  const handleSave = useCallback(async (): Promise<{ success: boolean; error: string }> => {
     if (!form.prodCode) {
       toast.error('품목명을 선택하세요.');
-      return;
+      return { success: false, error: '' };
     }
     if (!form.specCode) {
       toast.error('종류를 선택하세요.');
-      return;
+      return { success: false, error: '' };
     }
     if (!form.lengthCode) {
       toast.error('모양&길이를 선택하세요.');
-      return;
+      return { success: false, error: '' };
     }
     if (form.quantity < 1) {
       toast.error('수량을 입력하세요.');
-      return;
+      return { success: false, error: '' };
     }
 
     setIsSaving(true);
@@ -404,11 +404,11 @@ export function BendingLotForm({ initialData, isEditMode = false }: BendingLotFo
       );
       if (lotResult.__authError) {
         toast.error('인증이 만료되었습니다.');
-        return;
+        return { success: false, error: '' };
       }
       if (!lotResult.success || !lotResult.data) {
         toast.error(lotResult.error || 'LOT 번호 생성에 실패했습니다.');
-        return;
+        return { success: false, error: '' };
       }
 
       const lotData = lotResult.data;
@@ -420,6 +420,7 @@ export function BendingLotForm({ initialData, isEditMode = false }: BendingLotFo
 
       const saveParams = {
         memo: form.memo,
+        regDate: form.regDate,
         targetStockQty: form.quantity,
         bendingLot: {
           lot_number: lotData.lot_number,
@@ -446,11 +447,10 @@ export function BendingLotForm({ initialData, isEditMode = false }: BendingLotFo
 
       if (saveResult.__authError) {
         toast.error('인증이 만료되었습니다.');
-        return;
+        return { success: false, error: '' };
       }
       if (!saveResult.success) {
-        toast.error(saveResult.error || '저장에 실패했습니다.');
-        return;
+        return { success: false, error: saveResult.error || '저장에 실패했습니다.' };
       }
 
       toast.success(isEditMode ? '절곡품 재고생산이 수정되었습니다.' : '절곡품 재고생산이 등록되었습니다.');
@@ -459,6 +459,7 @@ export function BendingLotForm({ initialData, isEditMode = false }: BendingLotFo
       } else {
         router.push(basePath);
       }
+      return { success: true, error: '' };
     } finally {
       setIsSaving(false);
     }
diff --git a/src/components/stocks/StockProductionDetail.tsx b/src/components/stocks/StockProductionDetail.tsx
index 6e1d405d..d19d9763 100644
--- a/src/components/stocks/StockProductionDetail.tsx
+++ b/src/components/stocks/StockProductionDetail.tsx
@@ -141,7 +141,7 @@ export function StockProductionDetail({ orderId }: StockProductionDetailProps) {
               </div>
               <div className="space-y-2">
                 <Label>등록일</Label>
-                <Input value={data.createdAt} disabled />
+                <Input value={data.regDate} disabled />
               </div>
               <div className="space-y-2">
                 <Label>수량</Label>
diff --git a/src/components/stocks/StockProductionList.tsx b/src/components/stocks/StockProductionList.tsx
index 070533b6..48907c72 100644
--- a/src/components/stocks/StockProductionList.tsx
+++ b/src/components/stocks/StockProductionList.tsx
@@ -134,7 +134,7 @@ export function StockProductionList() {
 
       return matchesSearch && matchesFilter;
     })
-    .sort((a, b) => new Date(b.createdAt).getTime() - new Date(a.createdAt).getTime());
+    .sort((a, b) => new Date(b.regDate).getTime() - new Date(a.regDate).getTime());
 
   // 핸들러
   const handleView = (order: StockOrder) => {
@@ -212,7 +212,7 @@ export function StockProductionList() {
     { key: "lotNumber", label: "로트번호", className: "px-2", copyable: true },
     { key: "itemSummary", label: "품목", className: "px-2", sortable: true, copyable: true },
     { key: "quantity", label: "수량", className: "px-2 text-center", sortable: true },
-    { key: "createdAt", label: "등록일", className: "px-2", sortable: true, copyable: true },
+    { key: "regDate", label: "등록일", className: "px-2", sortable: true, copyable: true },
     { key: "status", label: "상태", className: "px-2 text-center", sortable: true },
     { key: "memo", label: "비고", className: "px-2", copyable: true },
   ], []);
@@ -249,7 +249,7 @@ export function StockProductionList() {
         </TableCell>
         <TableCell>{order.itemSummary || "-"}</TableCell>
         <TableCell className="text-center">{order.quantity || "-"}</TableCell>
-        <TableCell>{order.createdAt || "-"}</TableCell>
+        <TableCell>{order.regDate || "-"}</TableCell>
         <TableCell className="text-center">{getStatusBadge(order.status)}</TableCell>
         <TableCell className="max-w-[150px] truncate">{order.memo || "-"}</TableCell>
       </TableRow>
@@ -286,7 +286,7 @@ export function StockProductionList() {
         infoGrid={
           <div className="grid grid-cols-2 gap-x-4 gap-y-3">
             <InfoField label="수량" value={`${order.quantity}`} />
-            <InfoField label="등록일" value={order.createdAt || "-"} />
+            <InfoField label="등록일" value={order.regDate || "-"} />
             <InfoField label="로트번호" value={order.bendingLot?.lotNumber || "-"} />
             <InfoField label="품목 수" value={`${order.itemCount}개`} />
           </div>
@@ -373,7 +373,7 @@ export function StockProductionList() {
       endDate,
       onStartDateChange: setStartDate,
       onEndDateChange: setEndDate,
-      dateField: "createdAt",
+      dateField: "regDate",
     },
 
     itemsPerPage,
diff --git a/src/components/stocks/actions.ts b/src/components/stocks/actions.ts
index d93ebf9a..9fd9097c 100644
--- a/src/components/stocks/actions.ts
+++ b/src/components/stocks/actions.ts
@@ -97,6 +97,7 @@ export interface StockOrder {
   manager: string;
   itemCount: number;
   itemSummary: string;
+  regDate: string;
   createdAt: string;
   items: StockOrderItem[];
   bendingLot?: {
@@ -202,6 +203,7 @@ function transformApiToFrontend(apiData: ApiStockOrder): StockOrder {
     manager: apiData.options?.manager_name || '',
     itemCount: items.length,
     itemSummary: firstItemName ? `${firstItemName}${extraCount}` : '-',
+    regDate: apiData.options?.reg_date || formatDate(apiData.created_at),
     createdAt: formatDate(apiData.created_at),
     items,
     bendingLot: bendingLotData ? {
@@ -245,7 +247,7 @@ function transformFrontendToApi(data: StockOrderFormData): Record<string, unknow
     // STOCK 전용: 불필요 필드 명시적 null
     client_id: null,
     client_name: null,
-    site_name: null, // API 자동 설정 '재고생산'
+    site_name: '재고생산', // API 자동 설정 '재고생산'
     delivery_date: null,
     delivery_method_code: null,
     discount_rate: 0,
@@ -677,6 +679,7 @@ export async function generateBendingLot(
  */
 export async function createBendingStockOrder(params: {
   memo?: string;
+  regDate?: string;
   targetStockQty: number;
   bendingLot: BendingLotFormData;
   item: {
@@ -700,6 +703,7 @@ export async function createBendingStockOrder(params: {
     options: {
       production_reason: '절곡품 재고생산',
       target_stock_qty: params.targetStockQty || null,
+      reg_date: params.regDate || null,
       bending_lot: {
         lot_number: params.bendingLot.lot_number,
         prod_code: params.bendingLot.prod_code,
@@ -712,7 +716,7 @@ export async function createBendingStockOrder(params: {
     },
     client_id: null,
     client_name: null,
-    site_name: null,
+    site_name: '재고생산',
     delivery_date: null,
     delivery_method_code: null,
     discount_rate: 0,
@@ -752,6 +756,7 @@ export async function createBendingStockOrder(params: {
  */
 export async function updateBendingStockOrder(id: string, params: {
   memo?: string;
+  regDate?: string;
   targetStockQty: number;
   bendingLot: BendingLotFormData;
   item: {
@@ -775,6 +780,7 @@ export async function updateBendingStockOrder(id: string, params: {
     options: {
       production_reason: '절곡품 재고생산',
       target_stock_qty: params.targetStockQty || null,
+      reg_date: params.regDate || null,
       bending_lot: {
         lot_number: params.bendingLot.lot_number,
         prod_code: params.bendingLot.prod_code,
@@ -787,7 +793,7 @@ export async function updateBendingStockOrder(id: string, params: {
     },
     client_id: null,
     client_name: null,
-    site_name: null,
+    site_name: '재고생산',
     delivery_date: null,
     delivery_method_code: null,
     discount_rate: 0,