Keyed-Lok Machine Screws | Customized Machine Screws | Custom Machine Security Screws and Bits

KEYED-LOK Custom Key, High Security Screws Button (Flat) Machine Screws 18-8 Stainless Steel

Keyed-Lok® machine screws are custom manufactured of stainless or alloy steel to meet the demanding requirements for high security applications. Our button head styles are designed with a 20% larger head giving Keyed-Lok® 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 Keyed-lok® screws the most economical, tamperproof, high security screws 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

K02

4/40

.1120

.213

.201

.070

.055

K04

6/32

.1380

.262

.250

.085

.070

K06

8/32

.1640

.312

.298

.105

.085

K25

10/24

.1900

.361

.347

.120

.095

K25

12/24

.211

.440

.375

.160

.120

K25

1/4-20

.2500

.437

.419

.160

.130

K25

5/16-18

.3125

.547

.527

.190

.160

K31

3/8-16

.375

.656

.636

.225

.195

K31

1/2-13

.5000

.875

.851

.300

.260

K50

5/8-11

.6250

1.000

.970

.360

.320

K62

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

K02

4/40

.1120

.218

.255

.083

K04

6/32

.1380

.263

.307

.097

K06

8/32

.1640

.311

.359

.112

K25

10/24

.1900

.359

.411

.127

K25

12/24

.211

.405

.425

.155

K25

1/4-20

.2500

.480

.531

.161

K25

5/16-18

.3125

.600

.656

.198

K31

3/8-16

.375

.720

.781

.234

K31

1/2-13

.5000

.872

.938

.251

K50

5/8-11

.6250

1.112

1.188

.324

K62

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