Key Rex - Machine Screws | Custom Key Rex - Machine Screws

KEY-REX Custom Key High Security Screws Button (Flat) Machine Screws 18-8 Stainless Steel

Key-Rex™ machine screws are custom manufactured of stainless steel to meet the demanding requirements for high security applications. Our button head styles are designed with a 20% larger head giving Key-Rex™ a lower profile and making it more tamperproof. Power bits are available allowing economical and easy installation. The custom-designed keyway is specific to each user.

These combined features make KEY-REX™ screws the most economical, tamperproof, high security screw available.

Button Head Machine Screws

NOM. Screw Size

Screw Diameter

Head Diameter

Head Height

Drive Size

UNC.

REF.

MAX

MIN

MAX

MIN

REF.

2/56

.086

.164

.154

.060

.042

R02

4/40

.1120

.213

.201

.070

.055

R04

6/32

.1380

.262

.250

.085

.070

R06

8/32

.1640

.312

.298

.105

.085

R25

10/24

.1900

.361

.347

.120

.095

R25

12/24

.211

.440

.375

.160

.120

R25

1/4-20

.2500

.437

.419

.160

.130

R25

5/16-18

.3125

.547

.527

.190

.160

R31

3/8-16

.375

.656

.636

.225

.195

R31

1/2-13

.5000

.875

.851

.300

.260

R50

5/8-11

.6250

1.000

.970

.360

.320

R62

Flat Head Machine Screws

NOM. Screw Size

Screw Diameter

Head Diameter

Head Height

Drive Size

UNC

REF.

MIN

MAX

REF.

2/56

.086

.197

.168

.064

R02

4/40

.1120

.218

.255

.083

R04

6/32

.1380

.263

.307

.097

R06

8/32

.1640

.311

.359

.112

R25

10/24

.1900

.359

.411

.127

R25

12/24

.211

.405

.425

.155

R25

1/4-20

.2500

.480

.531

.161

R25

5/16-18

.3125

.600

.656

.198

R31

3/8-16

.375

.720

.781

.234

R31

1/2-13

.5000

.872

.938

.251

R50

5/8-11

.6250

1.112

1.188

.324

R62

We sell only to institutions and commercial accounts only. For small quantities go to www.mcmaster.com