ASME B18.2.1 Grade B Hex Bolt 1/4 × 2 in – UNC 20 TPI – Plain

Name: ASME B18.2.1 Grade B Hex Bolt 1/4 × 2 in – UNC 20 TPI – Plain
SKU: TTB-ASMEB18.2.1-B-025X200-UNC-20TPI-PL
Price: 123000.00 IRR
Availability: InStock

Manufacturer: TTBOLT

SKU: TTB-ASMEB18.2.1-B-025X200-UNC-20TPI-PL

ASME B18.2.1 Grade B Hex Bolt
Size: 1/4 × 2 in
Thread: UNC 20 TPI
Thread length: 3/4 in
Width across flats: 7/16 in
Head height: 3/16 in
Material: Carbon Steel
Finish: Plain
Estimated mass: 15.095 g/pc

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

This exact catalog variant has size 1/4 × 2 in, thread UNC 20 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

Standard	ASME B18.2.1
Product type	Hex Bolt
Size	1/4 × 2 in
Thread	UNC 20 TPI
Thread direction	Right Hand
Material	Carbon Steel
Grade / property class	B
Finish	Plain
Head height	3/16 in
Width across flats	7/16 in
Basic thread length	3/4 in
Plain shank length	1-1/4 in
Mass per piece	15.095 g/pc
Mass per 100 pieces	1.5095 kg/100 pc

Selection and ordering notes

Before ordering, confirm the required size (1/4 × 2 in), thread (UNC 20 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

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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 1/4 × 2 اینچ، رزوه UNC 20 TPI، ساده

1/4 x 2 in | B | پوشش Plain

جدول ابعادی

پارامتر	نماد	حداقل	حداکثر / اسمی	واحد
قطر اسمی	d	-	0.25	in
گام رزوه	n	-	20	TPI
عرض آچارخور	s	-	0.438	in
ارتفاع سر	k	-	0.188	in
طول	l	-	2	in

مشخصات محصول

رزوه1/4 20 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-025X200-UNC-20TPI-PL

Hex Bolt - ASMEB18.2.1

1/4 x 2 in | B | Plain Finish

DIMENSION TABLE

Parameter	Symbol	Min	Max / Nominal	Unit
Nominal diameter	d	-	0.25	in
Threads per inch	n	-	20	TPI
Width across flats	s	-	0.438	in
Head height	k	-	0.188	in
Length	l	-	2	in

PRODUCT DATA

Thread1/4 20 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-025X200-UNC-20TPI-PL

Products specifications

Attribute name	Attribute value
Standard	ASME B18.2.1
Product Type	Hex Bolt
Thread Length	3/4 in
Width Across Flats	7/16 in
Head Height	3/16 in
Material	Carbon Steel
Property Class / Grade	B
Finish	Plain
Unit System	in
Estimated Weight	15.095 g/pc
Thread
Thread Type	UNC
Thread Pitch	20 TPI
Thread Direction	Right Hand
Dimensions
Diameter	1/4 in
Length	2 in