紅栓 D 形卸扣達到聯邦規范RR-C-271D IVB 型號 A 級 2 類的性能要求（訂約方要求的供貨除外）。
Screw pin chain shackles meet the performance requirements of Federal Specification RR-C-271D, Type IVB, Grade A, Class 2, except for those provisions required of the contractor. For additional information, see page 391.
• 承重能力為 1/3 至 55 公噸。
• 鍛件 - 經過調質處理，配有紅色合金栓。
• 每個卸扣上都顯示工作負荷極限，永久不掉。
• 熱浸鍍鋅或天然色。
• 額定疲勞強度。
• 可針對指定標準（如 ABS、DNV、Lloyds）對卸扣進行安全試驗并提供證書或進行其他認證。如果訂購時提出要求，可提供收費的安全試驗和認證服務。
• 卸扣經過調質處理，可在攝氏零下 20 度的情況下達到 DNV 規定的 42焦耳的抗沖擊性能要求。
• 1/2t - 25t 尺寸型號符合 EN13889:2003 性能要求
• Crosby 產品達到甚至超出所有 ASME B30.26 要求，包括標識、柔韌度、設計系數、試驗負荷以及溫度要求。重要的是， Crosby產品達到 ASME B30.26 未涉及到的有關疲勞壽命、抗沖擊性能以及材料追蹤能力在內的其他關鍵性能要求。
• 紅栓® 是 Crosby 原廠產品的質量標志。
• Capacities 1/3 thru 55 metric tons.
• Forged - Quenched and Tempered, with alloy pins.
• Working Load Limit permanently shown on every shackle.
• Hot Dip galvanized or Self Colored.
• Fatigue rated.
• Shackles 25t and larger are RFID EQUIPPED.
• Shackles can be furnished proof tested with certificates to designated standards, such as ABS,
DNV, Lloyds, or other certification. Charges for proof testing and certification available when requested at the time of order.
• Shackles are Quenched and Tempered and can meet DNV impact requirements of 42 joules at -20 C.
• Crosby products meet or exceed all requirements of ASME B30.26 including identification, ductility, design factor, proof load and temperature requirements. Importantly, Crosby products meet other critical performance requirements including fatigue life, impact properties and material traceability, not addressed by ASME B30.26.
• Look for the Red Pin® . . . the mark of genuine Crosby quality.
• Type Approval and certification in accordance with ABS 2006 Steel Vessel Rules 1-1-17.7, and ABS Guide for Certification of Cranes.