{"id":13321,"date":"2026-07-30T11:06:35","date_gmt":"2026-07-30T09:06:35","guid":{"rendered":"https:\/\/lubeteam.it\/prodotto\/stauff-heavy-series-safety-locking-plate-type-sip-sipd\/"},"modified":"2026-08-07T10:09:28","modified_gmt":"2026-08-07T08:09:28","slug":"stauff-heavy-series-safety-locking-plate-type-sip-sipd","status":"publish","type":"product","link":"https:\/\/lubeteam.it\/en\/product\/stauff-heavy-series-safety-locking-plate-type-sip-sipd\/","title":{"rendered":"STAUFF Heavy Series Safety Locking Plate Type SIP \/ SIPD"},"content":{"rendered":"

Role and Function in the Hydraulic System<\/h3>\n

The STAUFF Heavy Series Safety Locking Plate Type SIP \/ SIPD<\/strong> is a critical component within fastening systems belonging to the renowned Heavy Twin Series. Specifically designed and dimensioned for use with STAUFF Groups 4S-D and 5S-D, this plate provides an advanced locking solution for industrial pipework and hydraulic systems subject to high pressures. Its primary function is to reinforce the anchoring system, acting as a safety device against vibrations and dynamic loads. Maintaining the correct preload is essential in hydraulic applications, and integrating this component helps prevent unexpected movement within the installation.<\/p>\n

Compatibility and Associated Fastening Systems<\/h3>\n

From an installation perspective, the STAUFF Heavy Series Safety Locking Plate Type SIP \/ SIPD works in complete synergy with other types of hardware dedicated to the Heavy Twin Series. Specifically, it acts as a locking device to prevent the loosening of Type AS Hexagon Head Bolts. Where required by the system specifications, Type SI Safety Lock Washers may alternatively be used to perform the same retention function. Compatible Type AS bolts comply with strict international standards such as DIN 931\/933 or ANSI\/ASME B18.2.1. Bolt dimensions vary according to the operating group: configurations such as M10x60 are used for STAUFF Group 4S (DIN 2), while M10x70 is used for STAUFF Group 5S (DIN 3). It is important to note that these dimensions apply exclusively when the system is used in combination with the Type DPAD Cover Plate.<\/p>\n

Construction Materials, Finishes and Resistance<\/h3>\n

Durability and resistance to corrosive agents depend on the selected construction material. Components associated with the STAUFF Heavy Series Safety Locking Plate Type SIP \/ SIPD family are available in various metallic versions, classified by specific codes:<\/p>\n

    \n
  • W1<\/strong>: Manufactured from Carbon Steel, supplied uncoated.<\/li>\n
  • W3<\/strong>: Manufactured from Zinc\/Nickel-Plated Carbon Steel. This variant is also the standard finish option for the North American market.<\/li>\n
  • W4<\/strong>: Manufactured from V2A Stainless Steel, corresponding to grades 1.4301 \/ 1.4305 (AISI 304 \/ 303).<\/li>\n
  • W5<\/strong>: Manufactured from V4A Stainless Steel, corresponding to grades 1.4401 \/ 1.4571 (AISI 316 \/ 316 Ti), ideal for the most aggressive environments.<\/li>\n<\/ul>\n

    For specific installation requirements, alternative materials and surface finishes not included among the standard options can be requested directly from STAUFF.<\/p>\n

    Threads, Dimensions and Interface Standards<\/h3>\n

    Every threaded component intended for use with the Heavy Twin Series and Groups 4S-D \/ 5S-D is manufactured to a high degree of mechanical precision. The fastening hardware is available with either ISO Metric Thread or Unified Coarse Thread (UNC), as detailed in the dimensional tables. For example, UNC options include variants such as 3\/8-16 UNC x 2-1\/4 for Group 4S and 3\/8-16 UNC x 2-3\/4 for Group 5S. Correct selection of the thread type and associated bolt dimensions ensures that the STAUFF Heavy Series Safety Locking Plate Type SIP \/ SIPD<\/strong> can perform its mechanical retention function without the risk of fatigue failure, thereby ensuring the operational safety of the entire hydraulic system.<\/p>\n

    Summary Technical Table of the Main Features of the STAUFF Heavy Series Safety Locking Plate Type SIP \/ SIPD<\/h3>\n
    \n\n\n\n\n\n\n\n\n\n\n\n\n
    Feature<\/th>\nValue<\/th>\n<\/tr>\n<\/thead>\n
    Reference Series<\/td>\nHeavy Twin Series<\/td>\n<\/tr>\n
    Compatible STAUFF Groups<\/td>\n4S-D and 5S-D<\/td>\n<\/tr>\n
    Primary Function<\/td>\nLocking device to prevent loosening<\/td>\n<\/tr>\n
    Alternative Devices (Same Function)<\/td>\nSafety Lock Washers (Type SI)<\/td>\n<\/tr>\n
    Compatible Fastening Hardware<\/td>\nHexagon Head Bolt (Type AS) with DPAD Cover Plate<\/td>\n<\/tr>\n
    AS Bolt Standards<\/td>\nDIN 931\/933, ANSI\/ASME B18.2.1<\/td>\n<\/tr>\n
    Supported Thread Type<\/td>\nISO Metric (M10), Unified Coarse Thread (UNC)<\/td>\n<\/tr>\n
    Available Materials (Codes)<\/td>\nW1, W3, W4 (AISI 304\/303), W5 (AISI 316\/316 Ti)<\/td>\n<\/tr>\n<\/tbody>\n<\/table><\/div>\n

    Product Codes<\/h3>\n
    \n\n\n\n\n\n\n\n\n\n\n
    Model \/ Product Family<\/th>\nCompatibility Details and Specifications<\/th>\n<\/tr>\n<\/thead>\n
    SIPD<\/td>\nSafety Locking Plate for Groups 4S-D and 5S-D<\/td>\n<\/tr>\n
    SI<\/td>\nSafety Lock Washers (alternative locking washers)<\/td>\n<\/tr>\n
    AS-M10x60-W1<\/td>\nHexagon Head Bolt, M10x60, Group 4S, W1 Steel<\/td>\n<\/tr>\n
    AS-3\/8-16UNCx2-1\/4-W3<\/td>\nHexagon Head Bolt, 3\/8-16 UNC, Group 4S, W3 Steel (North America)<\/td>\n<\/tr>\n
    AS-M10x70-W1<\/td>\nHexagon Head Bolt, M10x70, Group 5S, W1 Steel<\/td>\n<\/tr>\n
    AS-3\/8-16UNCx2-3\/4-W3<\/td>\nHexagon Head Bolt, 3\/8-16 UNC, Group 5S, W3 Steel (North America)<\/td>\n<\/tr>\n<\/tbody>\n<\/table><\/div>\n","protected":false},"excerpt":{"rendered":"

    The STAUFF Heavy Series Safety Locking Plate Type SIP \/ SIPD is specifically designed for use with STAUFF Groups 4S-D and 5S-D of the Heavy Twin Series. Ideal for preventing fastening hardware from loosening in hydraulic systems, it is used in combination with Type AS hexagon head bolts or Type SI safety lock washers for optimum fastening. It ensures reliable locking and maximum system stability.
    The available product codes (reference families and fastening hardware) are: SIPD (4S-D, 5S-D), SI, AS-M10x60-W1, AS-3\/8-16UNCx2-1\/4-W3, AS-M10x70-W1, AS-3\/8-16UNCx2-3\/4-W3.<\/p>\n","protected":false},"featured_media":13062,"template":"","meta":{"_joinchat":[]},"product_brand":[],"product_cat":[101,472],"product_tag":[281],"class_list":{"0":"post-13321","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-clamps","7":"product_cat-heavy-twin-series-clamps","8":"product_tag-stauff","10":"first","11":"instock","12":"shipping-taxable","13":"product-type-simple"},"yoast_head":"\nSTAUFF Heavy Series Safety Locking Plate Type SIP \/ SIPD \u2013 LubeTeam Hydraulic<\/title>\n<meta name=\"description\" content=\"STAUFF Heavy Series Safety Locking Plate Type SIP \/ SIPD for Groups 4S-D and 5S-D. 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