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.co.uk sells all lengths of UNF 7/8", hex bolts in self colour at the best internet prices with free, first class.
Orders placed before 2pm are usually dispatched same day (Mon-Fri).
Please make your size and pack quantity selection from the drop down menus at the top of the page.
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.
Our set screws are available in the following materials:
(Note: not all sizes are available in all materials/ finishes)
|
Material/ Finish |
Appearance |
Level of Corrosion Resistance |
Typical Application |
|
High Tensile Steel |
Self-Colour (black with no surface treatment) |
Low, without further surface treatment |
- No exposure to moisture - Often Greased/ Oiled |
|
High Tensile Steel - Zinc |
Bright Shine – Blue to Yellow |
Internal |
- Low exposure to moisture |
|
High Tensile Steel -Galvanised |
Textured, several dull, grey tones |
External |
- Constant Weathering - Chemical exposure - Frequent Wear |
|
A2 Stainless Steel |
Dull Shine |
External |
- Intermittent weathering - Hygiene |
|
A4 Stainless Steel |
Dull Shine |
External |
- Constant Weathering - Chemical exposure - Frequent Wear |
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.
Please choose from the following for technical and/ or sales enquiries.
- Fill out the website enquiry form
- Click on the CHAT icon on the website
- Call: 01242 522244
- Email: sam@fixaball.co.uk
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