diff --git a/app/Services/OrderService.php b/app/Services/OrderService.php
index 919395db..8d71fe81 100644
--- a/app/Services/OrderService.php
+++ b/app/Services/OrderService.php
@@ -1614,6 +1614,13 @@ public function createProductionOrder(int $orderId, array $data)
                                 $orderOptions['target_stock_qty'] ?? $order->quantity ?? 1
                             );
                             if ($stockBendingInfo) {
+                                // STOCK 부품 필터 정보 추가
+                                $stockBendingInfo['stockPartFilter'] = collect($items)->map(function ($item) {
+                                    return [
+                                        'itemName' => $item->item_name,
+                                        'partKey' => \App\Services\WorkOrderService::parseStockPartKeyStatic($item->item_name),
+                                    ];
+                                })->values()->toArray();
                                 $workOrderOptions = array_merge($workOrderOptions ?? [], ['bending_info' => $stockBendingInfo]);
                             }
                         }
@@ -2258,6 +2265,7 @@ private static function buildStockBendingInfoFromLot(array $bendingLot, int $qua
             'productCode' => $productCode,
             'finishMaterial' => $finishMaterial,
             'common' => ['type' => $guideType],
+            'isStockProduction' => true,
         ];
 
         // 가이드레일 (R=벽면, S=측면)
diff --git a/app/Services/WorkOrderService.php b/app/Services/WorkOrderService.php
index 7f0806a5..6847ebe1 100644
--- a/app/Services/WorkOrderService.php
+++ b/app/Services/WorkOrderService.php
@@ -216,6 +216,17 @@ private function fillStockBendingInfo(WorkOrder $workOrder): void
             );
 
         if ($stockBendingInfo) {
+            // work_order_items에서 부품명 추출하여 필터 정보 추가
+            $items = $workOrder->items ?? collect();
+            if ($items->isNotEmpty()) {
+                $stockBendingInfo['stockPartFilter'] = $items->map(function ($item) {
+                    return [
+                        'itemName' => $item->item_name,
+                        'partKey' => self::parseStockPartKey($item->item_name),
+                    ];
+                })->values()->toArray();
+            }
+
             $opts = $workOrder->options ?? [];
             $opts['bending_info'] = $stockBendingInfo;
             $workOrder->options = $opts;
@@ -223,6 +234,44 @@ private function fillStockBendingInfo(WorkOrder $workOrder): void
         }
     }
 
+    /**
+     * STOCK 품목명에서 부품 키 추출
+     *
+     * "가이드레일(측면) 본체(철재) 2438mm" → "본체"
+     * "가이드레일(측면) C형 1219mm" → "C형"
+     */
+    public static function parseStockPartKeyStatic(string $itemName): string
+    {
+        return self::parseStockPartKey($itemName);
+    }
+
+    private static function parseStockPartKey(string $itemName): string
+    {
+        // "본체", "C형", "D형", "마감재", "별도마감", "BASE" 등 추출
+        $patterns = [
+            '/본체/' => '본체',
+            '/C형/' => 'C형',
+            '/D형/' => 'D형',
+            '/별도마감/' => '별도마감',
+            '/마감재/' => '마감재',
+            '/BASE/i' => 'BASE',
+            '/하단마감/' => '하단마감재',
+            '/전면판/' => '전면판',
+            '/밑면판/' => '밑면판',
+            '/점검구/' => '점검구',
+            '/연기차단/' => '연기차단재',
+            '/케이스/' => '케이스',
+        ];
+
+        foreach ($patterns as $pattern => $key) {
+            if (preg_match($pattern, $itemName)) {
+                return $key;
+            }
+        }
+
+        return $itemName;
+    }
+
     /**
      * 목록 결과에서 STOCK 작업지시의 누락된 bending_info를 보충 후 DB 영구 저장
      */