ASME B18.31.2 Grade B7M Double-End Stud — Clamping Type 3-1/4 × 18 in – UNC 4 TPI – Black Oxide Manufacturer: TTBOLT SKU: TTB-ASMEB18.31.2-B7M-325X1800-UNC-4TPI-BO Add to compare list Email a friend Material specification: ASTM A193/A193M Product Type: Double-End Stud — Clamping Type Diameter: 3-1/4 Length: 18 in Thread: UNC, 4 TPI Material: Alloy Steel Grade: B7M Finish: Black Oxide Geometry reference: ASME B18.31.2 ASME B18.31.2 Grade B7M Double-End Stud — Clamping Type 3-1/4 × 18 in – UNC 4 TPI – Black Oxide is a Double-End Stud — Clamping Type manufactured and supplied by TTBolt in accordance with ASME B18.31.2.This exact catalog variant has size 3-1/4 × 18 in, thread UNC 4 TPI, material Alloy Steel, grade B7M and finish Black Oxide. It is intended for threaded connections where controlled engagement length, grade and finish are required.Technical data for this exact variantStandardASME B18.31.2Product typeDouble-End Stud — Clamping TypeSize3-1/4 × 18 inThreadUNC 4 TPIThread directionRight HandMaterialAlloy SteelGrade / property classB7MFinishBlack OxideBasic thread length7-1/2 inPlain shank length3 inMass per piece17649.197 g/pcMass per 100 pieces1764.9197 kg/100 pcSelection and ordering notesBefore ordering, confirm the required size (3-1/4 × 18 in), thread (UNC 4 TPI), grade (B7M) and finish (Black Oxide). Price calculations may use the theoretical mass shown above; final manufactured mass can vary with dimensional tolerances, chamfers, radii, coating thickness and production process. Technical drawing & data Download technical PDF Technical data sheet TTBoltIndustrial Fasteners Engineering Data Sheet DocumentTechnical Data Sheet StandardASMEB18.31.2 GradeB7M Issued2026-10-04 فارسی English استادبولت دوسر رزوه — نوع کلمپینگ ASME B18.31.2 گرید B7M سایز 3-1/4 × 18 اینچ، رزوه UNC 4 TPI، سیاه‌کاری 3-1/4 x 18 in | B7M | پوشش Black Oxide جدول ابعادی پارامترنماد حداقلحداکثر / اسمی واحد قطر اسمیd-3.25in گام رزوهn-4TPI قطر بدنهds3.2233.25in طولl-18in مشخصات محصول رزوه3-1/4 4 TPI UNC جهت رزوهراست‌گرد گریدB7M پوششBlack Oxide متریالAlloy Steel فرم رزوهUnified 60 deg یادداشت‌های فنی 1. تمام ابعاد بر حسب اینچ هستند مگر آنکه خلاف آن ذکر شده باشد. 2. تصاویر محصول از مدل Master در SolidWorks و با همان پارامترهای این ردیف تولید می‌شوند. 3. مقادیر حداقل و حداکثر از جدول ابعادی ASMEB18.31.2 گرفته شده‌اند؛ جایی که استاندارد تلرانس تعریف نکرده، تنها مقدار اسمی درج شده است. 4. وزن‌های درج‌شده در فروشگاه نظری‌اند و برای برآورد قیمت کاربرد دارند. شماره قطعهTTB-ASMEB18.31.2-B7M-325X1800-UNC-4TPI-BO Double-End Stud — Clamping Type - ASMEB18.31.2 3-1/4 x 18 in | B7M | Black Oxide Finish DIMENSION TABLE ParameterSymbol MinMax / Nominal Unit Nominal diameterd-3.25in Threads per inchn-4TPI Body diameterds3.2233.25in Lengthl-18in PRODUCT DATA Thread3-1/4 4 TPI UNC Thread directionRight hand GradeB7M FinishBlack Oxide MaterialAlloy Steel Thread formUnified 60 deg TECHNICAL NOTES 1. All dimensions are in inches unless stated otherwise. 2. Product views are generated from the SolidWorks master using the parameters of this row. 3. Minimum and maximum values are taken from the ASMEB18.31.2 dimension table; where the standard defines no tolerance, only the nominal value is shown. 4. Catalog weights are theoretical and intended for price estimation. Part numberTTB-ASMEB18.31.2-B7M-325X1800-UNC-4TPI-BO Products specifications Attribute name Attribute value Standard ASME B18.31.2 Material Specification ASTM A193/A193M-26 Common Requirements ASTM A962/A962M Geometry Reference ASME B18.31.2 Product Type Double-End Stud — Clamping Type Material Alloy Steel Property Class B7M Finish Black Oxide Property Class / Grade B7M Unit System in Market Status Common Estimated Weight 17649.197 g/pc Thread Thread Type UNC Thread Pitch 4 TPI Thread Direction Right Hand Dimensions Diameter 3-1/4 Length 18 in
