- Machine screws are designed for applications with a pre-tapped hole or mated to a threaded nut.
- Button head screws have a wider bearing surface and maintain a low head profile.
- A2 stainless steel is functionally equivalent to 304 grade, also known as 18-8 stainless steel.
- Stainless steel significantly improves resistance to tarnishing or corrosion.
DIMENSIONAL ATTRIBUTES- Diameter (Nominal): M4
- Thread Pitch: 0.7
- Diameter (Dimension): 4mm
- Length (Nominal): 20mm
- Thread Length (Nominal): 20mm
- Drive Recess Size: T20
- Drive Recess Width: 3.8mm
- Drive Recess Depth: 1.3mm
- Head Diameter: 7.6mm
- Head Diameter (Minimum): 7.24mm
- Head Diameter (Maximum): 7.6mm
- Head Height, Overall: 2.2mm
- Head Height, Overall (Minimum): 1.95mm
- Head Height, Overall (Maximum): 2.2mm
PRODUCT ATTRIBUTES- Category: Machine Screws
- System of Measurement: Metric
- Brand: Aspen Fasteners
- Head Style: Button Head
- Drive Style: Tamper-Resistant 6Lobe Pin Drive
- Drive Detail: Torx® Generic Alternative
- Thread Length: Full Thread
- Thread Direction: Right-Hand Thread
- Material: Stainless Steel
- Material Grade: A2 Stainless Steel
- Coating: Uncoated
- Origin: Origin Undefined
- Standards and Specifications: Art. 9121
Product UPC Code:
692559715414
- Drive Style:
- Tamper-Resistant 6Lobe Pin Drive
- Drive Detail:
- Torx(r) Generic Alternative
- Thread Length:
- Full Thread
- Thread Direction:
- Right-Hand Thread
- Shop by Material:
- Stainless Steel
- Shop by System of Measurement:
- Metric
- Order:
- Machine Thread Fasteners
- Head Height, Overall:
- 2.2mm
- Head Diameter:
- 7.6mm
- Thread Length (Nominal):
- 20mm
- Length (Nominal):
- 20mm
- Thread Pitch:
- 0.7
- Diameter (Dimension):
- 4mm
- Diameter (Nominal):
- M4
- Standards and Specifications:
- Art. 9121
- Coating:
- Uncoated
- Material Grade:
- A2 Stainless Steel
- Material:
- Stainless Steel
- Product Class:
- Externally Threaded Fasteners
- Shop by Application:
- Tamper-Resistant Security Fasteners
- Category:
- Machine Screws
- System of Measurement:
- Metric
- Brand:
- Aspen Fasteners
- Head Style:
- Button Head
- POS:
- TR077-407X20-000800
- Origin:
- Origin Undefined
- cad_3d_file_url:
- https://3d.aspenfasteners.com/assets/obj/TR077-407X20.zip
- Drive Recess Size:
- T20
- Drive Recess Width:
- 3.8mm
- Head Diameter (Minimum):
- 7.24mm
- specifications_document_url:
- https://www.aspenfasteners.com/content/2D_PDF/product70/TR077-407X20.PDF
- Head Height, Overall (Minimum):
- 1.95mm
- Drive Recess Depth:
- 1.3mm
- Head Height, Overall (Maximum):
- 2.2mm
- cad_3d_viewer_url:
- https://3d.aspenfasteners.com/viewer/?cad_model=obj/TR077-407X20
- Head Diameter (Maximum):
- 7.6mm
