Fixaball UNC 1/2" Socket Screw Countersunk High Tensile 10.9 DIN7991

For flush-fitting fastening applications, this Fixaball UNC 1/2 inch socket countersunk screw bolt features a coarse 13 T. P. I. thread and a self colour finish. Manufactured in high tensile Grade 12.9 steel, it conforms to ISO 10642, B18.3 and BS 2470.

Available in a range of lengths, shorter sizes are fully threaded and longer sizes are partially threaded. Countersunk fastener length is measured from the tip to the top.

Available options

• 1/2"-13 x 3/4" - fully threaded
• 1/2"-13 x 1" - fully threaded
• 1/2"-13 x 1 1/4" - fully threaded
• 1/2"-13 x 1 1/2" - fully threaded
• 1/2"-13 x 1 3/4" - fully threaded
• 1/2"-13 x 2" - fully threaded
• 1/2"-13 x 2 1/4" - fully threaded
• 1/2"-13 x 2 1/2" - partially threaded
• 1/2"-13 x 3" - partially threaded
• 1/2"-13 x 3 1/2" - partially threaded
• 1/2"-13 x 4" - partially threaded

Key features

• Diameter: 1/2"
• Thread pitch: 13 T. P. I. UNC coarse pitch
• Material and finish: high tensile steel Grade 12.9, self colour
• Head type: Allen socket countersunk head
• Standards: ISO 10642, B18.3, BS 2470

Specifications

• UNC thread form
• Unified National Coarse thread with 60 degree flank angle, rounded roots and flat crests
• For 1/2 diameter, UNC is 13 T. P. I. and UNF is 20 T. P. I.
• Corrosion resistance: low, without further surface treatment
• Typical application conditions: no exposure to moisture; often greased or oiled

Sizing

• 1/2"-13 x 3/4"
• 1/2"-13 x 1"
• 1/2"-13 x 1 1/4"
• 1/2"-13 x 1 1/2"
• 1/2"-13 x 1 3/4"
• 1/2"-13 x 2"
• 1/2"-13 x 2 1/4"
• 1/2"-13 x 2 1/2"
• 1/2"-13 x 3"
• 1/2"-13 x 3 1/2"
• 1/2"-13 x 4"

Rackhams Reference : LTMKL1EXUS