Key-Rex™

KEY-REX™ is not just a tamperproof, vandal-proof, tamper-resistant screw. Bryce Fastener - Key-Rex Key-Rex™ fasteners are the world's most secure, tamper-proof screws and bolts on the market. Every set of Key-Rex™ screws and bolts are custom "keyed" for the client. Only the client has the bits to fit their custom set which are designed to be nearly impossible to remove without the bit.

Key-Rex™ shapes are created using an encryption process that builds a shape out of millions of variables and defines a unique code for each part. Customers pay for a one-time key code tool and licensing agreement.
Security Level:
Key-Rex
With Raptor™ Claw Option:
Key-Rex
Key-Rex™:
  • Is the only high-security fastener of its kind
  • Requires a perfectly manufactured companion key/bit to remove
  • The keyway is licensed, private, and unique for each user for total "lock" security
  • Repels all other security bit tips and common tools
  • Can be power driven for speed and torque
  • Is rust-proof, stainless steel or 4037CrV steel with 150,000 psi
  • Is the least expensive "lock" on the market
  • When manufactured with the optional Raptor™ claw grip, it handles 20% more torque and provides more grip than any other security bolts and screws on the market.

Here's Why We Are The World's Most Secure Fastener

 

EACH DAY WITHOUT BRYCE
IS A SECURITY GAMBLE.

Every project is different and we're experts at helping customers get the perfect solution for each one.
Note: Not for retail sales.
 
 
 
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View Key Rex™ Flier CAD on Demand
 

Specifications

Key-Rex™ Self Tapping Screws

KEY-REX™ Custom High Security Screws Button (Flat) Self Tapping Screws, 18-8 Stainless Steel

Sheet metal screws are meant for tamperproof screw applications in wood, aluminum or steel. Manufactured in stainless steel, alloy or case hardened steel, KEY-REX™ sheet metal screws have the strength required for high security applications. Head and thread styles are custom designed to fit your specific application which further increase security. The custom key code is cut on a power bit allowing KEY-REX™ screws to be power driven and economical to install.

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

Button-Head Self-Tapping Screws
Key Rex Button Head Sheet Metal Screw
NOM. Screw Size
AB Self Tapping
2-32
4-24
6-20
8-19
10-16
12-14
14-14
Screw DIA.
REF.
.086
.112
.138
.164
.190
.216
.250
Head Diameter
MAX
MIN
.086
.154
 
.213
.201
 
.262
.250
 
.312
.298
 
.361
.347
 
.396
.382
 
.437
.419
 
Head Height
MAX
MIN
.046
.038
 
.059
.051
 
.073
.063
 
.087
.077
 
.101
.091
 
.116
.101
 
.132
.122
 
Drive Size
REF.
R02
R04
R06
R10
R12
R25
R25
 
Flat-Head Self-Tapping Screws
Key Rex Flat Head Sheet Metal Screw
NOM. Screw Size
AB Self Tapping
2-32
4-24
6-20
8-18
10-16
12-14
14-14
Screw DIA.
REF.
.086
.112
.138
.164
.190
.216
.250
Head Diameter
MAX
MIN
.197
.168
 
.255
.218
 
.307
.263
 
.359
.311
 
.411
.359
 
.480
.411
 
.531
.480
 
Head Height
 
.064
.083
.097
.112
.127
.135
.161
Drive Size
REF.
R02
R04
R06
R10
R12
R25
R25
 

Key-Rex™ Machine Screws

KEY-REX™ Custom High Security Screws Button (Flat) Self-Tapping 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
Key Rex Button Head Machine Screw
NOM. Screw Size
UNC.
2-56
4-40
6-32
8-32
10-24
12-14
1/4-20
5/16-18
3/8-16
1/2-13
5/8-11
Screw DIA.
REF.
.086
.112
.138
.164
.190
.211
.250
.312
.375
.500
.625
Head Diameter
MAX
MIN
.164
.154
 
.213
.201
 
.262
.250
 
.312
.298
 
.361
.347
 
.440
.375
 
.437
.419
 
.547
.527
 
.656
.636
 
.875
.851
 
1.000
.970
 
Head Height
MAX
MIN
.060
.042
 
.070
.055
 
.085
.070
 
.105
.085
 
.120
.095
 
.160
.120
 
.160
.130
 
.190
.160
 
.225
.195
 
.300
.260
 
.360
.320
 
Drive Size
REF.
R02
R04
R06
R10
R12
R25
R25
R31
R37
R50
R62
 
Flat-Head Machine Screws
Key Rex Flat Head Machine Screw
NOM. Screw Size
UNC.
2-56
4-40
6-32
8-32
10-24
12-14
1/4-20
5/16-18
3/8-16
1/2-13
5/8-11
Screw DIA.
REF.
.086
.112
.138
.164
.190
.211
.250
.312
.375
.500
.625
Head Diameter
MAX
MIN
.197
.168
 
.218
.255
 
.263
.307
 
.311
.359
 
.359
.411
 
.405
.425
 
.480
.531
 
.600
.656
 
.720
.781
 
.872
.938
 
1.112
.970
 
Head Height
 
.064
.083
.097
.112
.127
.155
.161
.198
.234
.251
.324
 
Drive Size
REF.
R02
R04
R06
R10
R12
R25
R25
R31
R37
R50
R62
 

Key-Rex™ Metric Machine Screws

KEY-REX™ Custom High Security Screws Button (Flat) Self Tapping Screws, 18-8 Stainless Steel

Button-Head Metric Machine Screws
Key Rex Button Head Machine Screw
NOM. Screw Size
 
M2x0.4*
M2.5x0.45*
M3x0.5
M4x0.7
M5x0.8
M6x1.0
M8x1.25
M10x1.5
M12x1.75
M16x2
Screw DIA.
REF.
.077
.097
.118
.157
.196
.236
.315
.393
.472
.630
Head Diameter MM
MAX
MIN
4.4
4.0
 
4.8
4.3
 
5.7
5.4
 
7.6
7.24
 
9.5
9.14
 
10.5
10.07
 
14.0
13.57
 
17.5
17.07
 
21.0
20.48
 
28.0
27.48
 
Head Height MM
MAX
MIN
1.4
1.0
 
1.5
1.3
 
1.65
1.43
 
2.20
1.95
 
2.75
2.5
 
3.3
3.0
 
4.4
4.05
 
5.5
5.2
 
6.6
6.24
 
8.80
8.44
 
Drive Size
REF.
R02
R04
R06
R10
R12
R25
R31
R37
R50
R62
 
Flat-Head Metric Machine Screws
Key Rex Flat Head Metric MachineScrew
NOM. Screw Size
UNC
M2x0.4*
M2.5x0.45*
M3x0.5
M4x0.7
M5x0.8
M6x1.0
M8x1.25
M10x1.5
M12x1.75
M16x2
Screw DIA.
REF.
.077
.097
.118
.157
.196
.236
.315
.393
.472
.630
Head Diameter MM
MAX
MIN
4.3
3.6
 
5.9
4.7
 
6.72
5.35
 
8.00
7.00
 
11.2
9.75
 
13.5
11.7
 
17.92
15.62
 
22.4
19.5
 
27
23.4
 
34
23
 
Head Height MM
MAX
1.4
1.85
1.88
2.2
3.1
3.8
4.96
6.2
7.44
8.8
 
Drive Size
REF.
R02
R04
R06
R10
R12
R25
R31
R37
R50
R62
 

Key-Rex™ Micro Self-Tapping Screws

KEY-REX™ Custom High Security Screws Button (Flat) Self Tapping Screws, 18-8 Stainless Steel

Micro self-tapping metal screws are ideally suited for tamper proof plastic applications. Standard micro selftapping screws usually come in a blunt point style and sometimes in a plastics thread. Key-Rex® however, is available in stainless or alloy steel for toughness and designed to meet the requirements of your specific application. Since each screw is individualized, the head diameter is also often customized to add extra security. With the low minimums, and custom features, Key-Rex® Micro self tapping screws are the most economical, high security, tamperproof screws in the industry.

Key-Rex™ Micro Machine Screws

KEY-REX™ Custom High Security Screws Button (Flat) Self-Tapping Screws, 18-8 Stainless Steel

Micro machine screws are tamperproof screws that are very small in diameter and ideal for small instruments or electronics that require high security. KEY-REX® screws are manufactured out of stainless or alloy steel for the toughness required in high security applications. Since each KEY-REX® socket is custom designed, it is easy to custom other features such as head diameter and threads to fulfill specific high security needs. Micro tamper-resistant screws (in any style) are not usually stock items and must be special ordered. KEY-REX® screws do not require big minimums for special orders, and thus are the most economical as well as the most secure tamperproof fasteners available.

Key-Rex™ Drivers

1/4 Hex - 1GBR02 - $20.00

1/4 Hex - 1GBR04 - $20.00

1/4 Hex - 1GBR10 - $14.00

1/4 Hex - 1GBR12 - $14.00

1/4 Hex - 1GBR25S - $14.00

1/4 Hex - 1GBR25 - $14.00

5/16 Hex - 1GBR31 - $20.00

5/16 Hex - 1GBR37 - $20.00

1/2 Hex - 1GBR50 - $30.00

1/2 Hex - 1GBR62 - $30.00