UNF, 7/8" x 3", Hex Bolt, High Tensile/ 8.8, Self Colour, DIN 931. 4 pack.

UNF, 7/8" x 3", Hex Bolt, High Tensile (S/ 8.8), Self-Colour.

Fixaball sells all lengths of UNF 7/8", hex bolts in self colour at the best internet prices 

Orders placed before 2pm are usually dispatched same day (Mon-Fri).

Standard, Free Delivery is Royal Mail, 2nd Class (2-5 days, most likely 2 days). For a faster delivery time, select 1st class or courier at checkout. Packs weighing under 250grams are upgraded to 1st class as much as possible,

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Set Screw, Hex Head is similar to a hex head, bolt and can be used in a similar way. The difference is that a set is fully threaded and a bolt is not. A bolt has a part-plain shank that will reduce damage to a hole where you will expect movement and vibrations. A set might be used to fix something to a permanent position and has better flexibility with fastening with its’ longer threaded area.

Material Properties

 UNIFIED THREAD STANDARDS 

The basic American standards for fastening screw threads as agreed upon by standard bodies of Canada, the United Kingdom, and the United States. They are a complete and integrated system of threads for fastening purposes. Their outstanding characteristic is general interchangeability of threads achieved through the standardization of thread form, diameter-pitch combinations, and limits of size

Unified National Coarse (UNC) is a thread form with a 60 degree flank angle rounded roots and flat crests. For a given diameter it has a larger thread pitch than an equivalent diameter UNF thread. The unified thread is based on inch sizes and was first standardised in 1948 unifying the Whitworth and American standard thread forms.

Unified National Fine (UNF) is a thread form with a 60 degree flank angle rounded roots and flat crests. For a given diameter it has a smaller thread pitch than an equivalent diameter UNC thread.

Unified National Extra Fine (UNEF)  is a Unified thread form with a very fine (small) pitch that are typically used on instruments and parts requiring a fine adjustment.

Unified National (UN) is a thread form with a rounded root contour, applies only to external threads. (The UN thread form has a flat, or optionally, a rounded root contour.) The majority of fasteners with a Unified thread form (UNC, UNF) have a rounded root contour i.e. are UNR threads.