Delivery Time:30 days
Certification:ISO 9001

Carbon Steel Robertson Square Drive Flat Head Screws Silver Zinc Plated 4.8 X 63 mm

Square drive or Robertson@ drive screw with flat head sharp point and wood threads for application on wooden parts .

Robertson square screws has a 90 degree or 120 degree head and blank angle is up to 45 degree for cutting material as quickly as possible .

Thread diameter	4.8
Thread length	42
Head height	5.5
Head diameter	10
Head drive	Square / robertson
Pitch	1.59
Full length	63

Note : all dimensions are millimeters

Carbon steel robertson square screw is quenched and tempered to ensure enough strength during installation and improve efficiency .

Material code	1018
Tensile strengh	539
Case hardness	HV500
Core hardness	HV400
Density	7.85
Yiled strength	495
Ductility	33.5
Property class	6.8

Finishing for Robertson square screw

Finishing	Blue zinc
Standard	RoHS ( 2002/95-EC )
Thickness	3 um
Color	Silver

Features for Robertson square screw

1 . Perfect flexibility and not easy to be deformed

2 . High tensile strength with fast cutting performance

3 . Effective drilling

4 . Harden material with strict dimensions

5 . Over threaded length for locking

Application

Robertson square screws are often used to secure wooden pieces or plastic parts that in industry .

RFQs

Q What material for robertson square screw ?

A Carbon steel and stainless steel

Q What finishing for Robertson square screw ?

A Popular finishing including zinc ,nickel ,tin ,chrome ,oxide and paint

Q How to ensure Robertson square screws are not broken or deformed during installation ?

A All Robertson square screws are quenched and tempered , the hardness is up to HRC 50, this is easy to be capable of request from wooden parts .