products

Home / Products / Bolts / Hexagon Head Bolts / BS 1768:1963 Inch Series Hex Head Drilled Shank Bolt

BS 1768:1963 Inch Series Hex Head Drilled Shank Bolt

BS 1768:1963 Inch Series Hex Head Drilled Shank Bolt belongs to the inch-series fastener system. The drilled shank allows use with split pins, lock wire, or other mechanical locking methods where additional locking confirmation is required.

The refined specification supports dimensional consistency and good assembly feel, while the hex head allows quick service with common tools. It is suitable for legacy inch-series equipment, older machinery maintenance, engineering vehicles, transmission joints, and export spare parts.

Procurement should confirm inch thread form, drilled-hole location, grip length, and matching nut size. Material and corrosion-protection options can be selected according to inventory needs or project environment to reduce replacement and maintenance risk.

Contact Us
PREV：GOST 7796 (-3):1970 Type 3 Hex Head Drilled Head Bolt NEXT：ASME B18.2.6:2019 High Strength Tension Control Hex Head Bolt

Dimensions: inch

Thread size d

1/4

5/16

3/8

7/16

1/2

(9/16)

5/8

3/4

PP

UNC

20

18

16

14

13

12

11

10

UNF

28

24

24

20

20

18

18

16

ds

Max.

0.25

0.3125

0.375

0.4375

0.5

0.5625

0.625

0.75

Min.

0.2465

0.309

0.3715

0.4335

0.496

0.5585

0.619

0.744

s

Max.

0.4375

0.5

0.5625

0.625

0.75

0.8125

0.9375

1.125

Min.

0.4305

0.493

0.5545

0.617

0.742

0.8045

0.9295

1.115

e

Max.

0.505

0.577

0.65

0.722

0.866

0.938

1.083

1.3

da

Max.

0.421

0.483

0.545

0.605

0.73

0.792

0.918

1.1

Min.

0.411

0.473

0.535

0.595

0.72

0.782

0.908

1.09

k

Max.

0.163

0.211

0.243

0.291

0.323

0.371

0.403

0.483

Min.

0.153

0.201

0.233

0.281

0.313

0.361

0.393

0.463

r

Max.

0.025

0.025

0.025

0.025

0.025

0.045

0.045

0.045

Min.

0.015

0.015

0.015

0.015

0.015

0.02

0.02

0.02

d1

Max.

0.084

0.1

0.117

0.117

0.152

0.152

0.184

0.184

Min.

0.079

0.095

0.112

0.112

0.146

0.146

0.177

0.177

 

Thread size d

7/8

1

1-1/8

1-1/4

(1-3/8)

1-1/2

1-3/4

2

PP

UNC

9

8

7

7

6

6

5

2004/1/2

UNF

14

12

-

-

-

-

-

-

ds

Max.

0.875

1

1.125

1.25

1.375

1.5

1.75

2

Min.

0.867

0.992

1.117

1.242

1.365

1.49

1.74

1.99

s

Max.

1.3125

1.5

1.6875

1.875

2.0625

2.25

2.625

3

Min.

1.3005

1.488

1.6575

1.83

2.0175

2.205

2.565

2.94

e

Max.

1.515

1.732

1.948

2.165

2.382

2.598

3.031

3.464

da

Max.

1.285

1.473

1.641

1.813

2.001

2.188

2.543

2.918

Min.

1.275

1.463

1.625

1.797

1.985

2.172

2.527

2.902

k

Max.

0.563

0.627

0.718

0.813

0.878

0.974

1.134

1.263

Min.

0.543

0.597

0.678

0.773

0.838

0.934

1.074

1.203

r

Max.

0.065

0.095

0.095

0.095

0.095

0.095

0.095

0.095

Min.

0.04

0.06

0.06

0.06

0.06

0.06

0.06

0.06

d1

Max.

0.184

0.222

0.222

0.254

0.254

0.29

0.353

0.353

Min.

0.177

0.213

0.213

0.244

0.244

0.28

0.343

0.343

① Bolts with cotter pins are only available on special order. Purchasers should indicate Dimension Lh in their inquiries and orders.

OUR PRODUCTS

Related Products

Better Fastener Industry Co., Ltd.

ABOUT US

Hangzhou Better Fastener
Technology Limited

Better Fastener is a professional fastener enterprise specializing in the manufacturing of steel washers, stainless steel washers, spring washers and sealingwashers. Founded in 2001 as a washer factory, the company expanded into a comprehensive enterprise integrating washers, nuts, bolts, spring nuts and other fastener products in 2010.

The company positions itself as a provider of comprehensive one-stop services for customers, relying on technological R&D, industrial investment and trade distribution.

With an experienced professional team and a sound sales network, Better Fastener has achieved excellent sales performance in both domestic and foreign markets,and has grown into one of the competitive manufacturers and suppliers in China's industrial fastener industry.

Better Fastener is committed to becoming a trusted fastener supplier for customers with reliable product quality, reasonable prices and on-time delivery

OUR CERTIFICATE

Certificate Of Honour

  • Certificate
  • Certificate
  • Certificate
  • Certificate
  • Certificate
  • Certificate

NEWS

Latest News

  • What is a Screw?

    A screw is a fastening tool that utilizes the principle of an inclined spiral plane to join or secure objects together. Its core structure consists of a cylindrical body with continuous threads (like spiral ridges), typically featuring a head at one end for convenient rotation. When turned, the rotational motion is con...

    READ MORE +
  • What is a Nuts?

    Now that we've covered bolts, their "perfect partner" — the nut — is much easier to understand. Simply put, a nut is a small metal block or disc with a round hole in the center and internal threads on the wall of that hole. Its core function is to work with an externally threaded bolt to clamp two or more components to...

    READ MORE +
  • What is a Washers?

    Simply put, a washer is a thin, disc-shaped ring with a central hole, typically made of metal (such as carbon steel, stainless steel, or copper) or non-metallic materials (such as rubber, plastic, or asbestos). It is placed between the head of a bolt/nut and the surface of the workpiece, or at the junction between the ...

    READ MORE +
  • What is a Bolt?

    Simply put, a bolt is a cylindrical fastener with external threads. It works with a matching nut or is screwed directly into a threaded hole of the mating part to firmly hold two or more components together. To put it intuitively, think of it as a "metal nail." However, unlike a nail that is driven in with a hammer, a ...

    READ MORE +
X Facebook
Products News