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TTBolt ASMEB18.2.1

ASME B18.2.1 Grade B Hex Bolt 5/16 × 4-1/2 in – UNC 18 TPI – Plain

Manufacturer: TTBOLT
SKU: TTB-ASMEB18.2.1-B-0313X450-UNC-18TPI-PL
ASME B18.2.1 Grade B Hex Bolt
Size: 5/16 × 4-1/2 in
Thread: UNC 18 TPI
Thread length: 7/8 in
Width across flats: 1/2 in
Head height: 15/64 in
Material: Carbon Steel
Finish: Plain
Estimated mass: 48.411 g/pc

This Hex Bolt is manufactured and supplied by TTBolt in accordance with ASME B18.2.1.

This exact catalog variant has size 5/16 × 4-1/2 in, thread UNC 18 TPI, material Carbon Steel, grade B and finish Plain. It is intended for mechanically fastened joints that require the stated dimensions, thread, grade and finish.

Technical data for this exact variant

StandardASME B18.2.1
Product typeHex Bolt
Size5/16 × 4-1/2 in
ThreadUNC 18 TPI
Thread directionRight Hand
MaterialCarbon Steel
Grade / property classB
FinishPlain
Head height15/64 in
Width across flats1/2 in
Basic thread length7/8 in
Plain shank length3-5/8 in
Mass per piece48.411 g/pc
Mass per 100 pieces4.8411 kg/100 pc

Selection and ordering notes

Before ordering, confirm the required size (5/16 × 4-1/2 in), thread (UNC 18 TPI), grade (B) and finish (Plain). 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
TTBolt

Industrial Fasteners Engineering Data Sheet

Document
Technical Data Sheet
Standard
ASMEB18.2.1
Grade
B
Issued
2026-10-05

پیچ شش‌گوش ASME B18.2.1 گرید B سایز 5/16 × 4-1/2 اینچ، رزوه UNC 18 TPI، ساده

5/16 x 4.5 in | B | پوشش Plain

جدول ابعادی

پارامترنماد حداقلحداکثر / اسمی واحد
قطر اسمیd-0.3125in
گام رزوهn-18TPI
عرض آچارخورs-0.5in
ارتفاع سرk-0.235in
طولl-4.5in

مشخصات محصول

رزوه5/16 18 TPI UNC
جهت رزوهراست‌گرد
گریدB
پوششPlain
متریالCarbon 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 ASMEB18.2.1 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 قطعه
TTB-ASMEB18.2.1-B-0313X450-UNC-18TPI-PL

ASMEB18.2.1TTB-ASMEB18.2.1-B-0313X450-UNC-18TPI-PLttbolt.com

Hex Bolt - ASMEB18.2.1

5/16 x 4.5 in | B | Plain Finish

DIMENSION TABLE

ParameterSymbol MinMax / Nominal Unit
Nominal diameterd-0.3125in
Threads per inchn-18TPI
Width across flatss-0.5in
Head heightk-0.235in
Lengthl-4.5in

PRODUCT DATA

Thread5/16 18 TPI UNC
Thread directionRight hand
GradeB
FinishPlain
MaterialCarbon 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 ASMEB18.2.1 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 number
TTB-ASMEB18.2.1-B-0313X450-UNC-18TPI-PL

ASMEB18.2.1TTB-ASMEB18.2.1-B-0313X450-UNC-18TPI-PLttbolt.com

Products specifications

Attribute name Attribute value
Standard ASME B18.2.1
Product Type Hex Bolt
Thread Length 7/8 in
Width Across Flats 1/2 in
Head Height 15/64 in
Material Carbon Steel
Property Class / Grade B
Finish Plain
Unit System in
Estimated Weight 48.411 g/pc
Thread
Thread Type UNC
Thread Pitch 18 TPI
Thread Direction Right Hand
Dimensions
Diameter 5/16 in
Length 4-1/2 in