EFC International
EFC International
1940 Craigshire St. Louis,
MO 63146-4008
Phone: 1 314.434.28881
Contact: www.efc-intl.com/contact
Website: www.efc-intl.com
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BigHead® Threaded Bolts are externally threaded with perforated heads. They come in a variety of head shapes and are manufactured in both metric and UNC thread forms in numerous lengths and diameters. BigHead® Bolts are available in steel and/or stainless steel, depending on thread size and stud length.
BigHead® Round Head Bondable Threaded Bolts
Unit of Measure
1 2 

Item #

Item Name

Thread Size

Head Size

Stud Length

25BM1B15M4 N/A BigHead® Threaded M4 Square Head, Steel Bondable Bolt N/A M4 N/A 15 x 15 mm N/A 12 mm16 mm30 mm
25BM1B15M5 N/A BigHead® Threaded M5 Square Head, Steel Bondable Bolt N/A M5 N/A 15 x 15 mm N/A 12 mm16 mm20 mm25 mm30 mm
25BM1B15M8 N/A BigHead® Threaded M8 Round Head, Steel Bondable Bolt N/A M8 N/A 19 mm N/A 12 mm15 mm
25BM1B20M5 N/A BigHead® Threaded M5 Round Head, Steel Bondable Bolt N/A M5 N/A 20 mm N/A 16 mm
25BM1B20M6 N/A BigHead® Threaded M6 Round Head, Steel Bondable Bolt N/A M6 N/A 20 mm N/A 20 mm
25BM1B20M8 N/A BigHead® Threaded M8 Round Head, Steel Bondable Bolt N/A M8 N/A 20 mm N/A 25 mm
25BSM1B20M6 N/A BigHead® Threaded M6 Round Head, Stainless Steel Bondable Bolt N/A M6 N/A 20 mm N/A 40 mm
25BSM1B20M8 N/A BigHead® Threaded M8 Round Head, Stainless Steel Bondable Bolt N/A M8 N/A 20 mm N/A 25 mm
25BM1B23M4 N/A BigHead® Threaded M4 Round Head, Steel Bondable Bolt N/A M4 N/A 23 mm N/A 16 mm20 mm25 mm
25BM1B23M5 N/A BigHead® Threaded M5 Round Head, Steel Bondable Bolt N/A M5 N/A 23 mm N/A 12 mm16 mm20 mm25 mm30 mm
25BM1B23M6 N/A BigHead® Threaded M6 Round Head, Steel Bondable Bolt N/A M6 N/A 23 mm N/A 12 mm16 mm20 mm25 mm30 mm40 mm50 mm
25BM1B23M8 N/A BigHead® Threaded M8 Round Head, Steel Bondable Bolt N/A M8 N/A 23 mm N/A 15 mm30 mm35 mm60 mm
25BM1B23M10 N/A BigHead® Threaded M10 Round Head, Steel Bondable Bolt N/A M10 N/A 23 mm N/A 40 mm
25BSM1B23M4 N/A BigHead® Threaded M4 Round Head, Stainless Steel Bondable Bolt N/A M4 N/A 23 mm N/A 20 mm
25BSM1B23M5 N/A BigHead® Threaded M5 Round Head, Stainless Steel Bondable Bolt N/A M5 N/A 23 mm N/A 12 mm16 mm
25BSM1B23M6 N/A BigHead® Threaded M6 Round Head, Stainless Steel Bondable Bolt N/A M6 N/A 23 mm N/A 12 mm16 mm25 mm
25BSM1B23M8 N/A BigHead® Threaded M8 Round Head, Stainless Steel Bondable Bolt N/A M8 N/A 23 mm N/A 25 mm30 mm
25BSM1B23M10 N/A BigHead® Threaded M10 Round Head, Stainless Steel Bondable Bolt N/A M10 N/A 23 mm N/A 30 mm
25BM1B30M8 N/A BigHead® Threaded M8 Round Head, Steel Bondable Bolt N/A M8 N/A 30 mm N/A 20 mm
25BM1B30M10 N/A BigHead® Threaded M10 Round Head, Steel Bondable Bolt N/A M10 N/A 30 mm N/A 40 mm
25BSM1B30M8 N/A BigHead® Threaded M8 Round Head, Stainless Steel Bondable Bolt N/A M8 N/A 30 mm N/A 25 mm
25BSM1B30M10 N/A BigHead® Threaded M10 Round Head, Stainless Steel Bondable Bolt N/A M10 N/A 30 mm N/A 50 mm
25BM1B38M4 N/A BigHead® Threaded M4 Round Head, Steel Bondable Bolt N/A M4 N/A 38 mm N/A 25 mm
25BM1B38M5 N/A BigHead® Threaded M5 Round Head, Steel Bondable Bolt N/A M5 N/A 38 mm N/A 12 mm20 mm40 mm
25BM1B38M6 N/A BigHead® Threaded M6 Round Head, Steel Bondable Bolt N/A M6 N/A 38 mm N/A 16 mm20 mm25 mm30 mm35 mm40 mm60 mm75 mm100 mm
Unit of Measure
1 2