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CRESCENT MANUFACTURING
 

BETA AND BETA-PRO MINIATURE SELF-THREADING SCREWS

Crescent Manufacturing has developed a fastener with back tapered threads and a specially developed point angle that reduces the torque requirement and provides ease of installation. Beta and Beta-Pro fasteners are miniature thread forming screws that can be substituted for your more expensive licensed trilobular parts. Beta for plastics and Beta-Pro for metals.

The effectiveness of Beta and Beta-Pro fasteners is created by the contact pressure between the wall of the hole and the thread of the fastener. Beta design increases the strength of the fastener and decreases the contact area, providing a very efficient method if thread forming with #0 thru #4 size screws.
Beta and Beta-Pro fasteners are offered in sizes #0 thru #4 (M1.4-M3) in length up to 1-7/8" (48mm). They can be manufactured in the material of your choosing, including 302ss, 400 series stainless, low carbon steel, alloy steels or brass. All are available in any of the standard head styles and drives or send us a drawing for something manufactured to your requirements.

Crescent will manufacture as few as 1000 pieces or into the millions, per your requirements. Miniature fasteners are our area of expertise and Beta and Beta-Pro are just two more reasons why we are the fastener manufacturer for you!

Beta = Type "B" recommended hole size

0-48

Approx. .046

1-42

Approx. .059

2-32

Approx. .072

3-28

Approx. .084

4-24

Approx. .096

Beta = Type "F" recommended hole size

2-56

Approx. .076

2-64

Approx. .077

3-48

Approx. .087

3-56

Approx. .089

4-40

Approx. .097

4-48

Approx. .100

BETA TENSILE STRENGTH

BETA-PRO TENSILE STRENGTH
THREAD
SIZE
STRESS
AREA (in 2)
TENSILE
STRENGTH (lbs)
#0

0.0012

200

#1

0.0020

350

#2

0.0031

550

#3

0.0041

750

#4

0.0054

1000

Screw Size

Stress Area
(in 2 )

Tensile Strength (lbs)

Coarse

Fine

Coarse

Fine

Coarse

Fine

---

#0-80

---

0.00180

---

300

#1-64

#1-72

0.00263

0.00278

500

525

#2-56

#2-64

0.00370

0.00394

700

750

#3-48

#3-56

0.00487

0.00523

900

1000

#4-40

#4-48

0.00604

0.00661

1150

1200

 
 


Check our Parts In Inventory or Contact Crescent Manufacturing.