Description
UNC 3/4″ (10 T.P.I.), Coarse Pitch, High Tensile (Grade ‘S’/ 10.9), Self Colour. Allen (hex) Socket, Countersunk Head, Allen Screw/ Bolt, ISO 10642, B18.3, BS 2470
Fixaballsellsall lengths of 3/4″, UNC, countersunk socket screw bolts.
Countersunk Head, Allen/ Hexagon SocketScrew/ Bolts
A countersunk head is designed so that the head sits flush on the fastened material’s surface. The hexagonal socket in the head is used to tighten and loosen the fastener with an allen/ hex key/ wrench. The length of a countersunk fastener is always from tip to the top. Countersunk socket fasteners are a bolt if they have a partially threaded shank (part plain shank) and are a set screw if they are fully threaded. The shank appears in the longer lengths. Please contact us if the shank length is crucial.
How to measure a countersunkfixing/ fastener
The length of a countersunk fixing/ fastener is always from tip to the top.
High Tensile 10.9 Grade Steel.
Available Finish: Plain/ Black/ Self Colour
Orders placed before 2pm are dispatchedsame 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.
Please make your Number of Items in Pack’,’Length’and Quantity(of packs) selection from the drop down menus.
UNC, 3/4″ Allen Socket, CountersunkScrew/ Bolt lengths available:
FT – Fully Threaded
PT – Partially Threaded
| 3/4″-10×1″,(FT) SOCKET COUNTERSUNK HEAD SCREWS UNC ALLOY SELF COLOUR |
| 3/4″-10×1 1/4″,(FT) SOCKET COUNTERSUNK HEAD SCREWS UNC ALLOY SELF COLOUR |
| 3/4″-10×1 1/2″,(FT) SOCKET COUNTERSUNK HEAD SCREWS UNC ALLOY SELF COLOUR |
| 3/4″-10×1 3/4″,(FT) SOCKET COUNTERSUNK HEAD SCREWS UNC ALLOY SELF COLOUR |
| 3/4″-10×2″,(FT) SOCKET COUNTERSUNK HEAD SCREWS UNC ALLOY SELF COLOUR |
| 3/4″-10×2 1/4″,(FT) SOCKET COUNTERSUNK HEAD SCREWS UNC ALLOY SELF COLOUR |
| 3/4″-10×2 1/2″,(FT) SOCKET COUNTERSUNK HEAD SCREWS UNC ALLOY SELF COLOUR |
| 3/4″-10×3″,(FT) SOCKET COUNTERSUNK HEAD SCREWS UNC ALLOY SELF COLOUR |
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Fixaball Specialist Fixings and Fasteners UNC/UNF Countersunk Socket Screw/ Bolt Diameters and T.P.I.’s Conforming toISO 10642, B18.3, BS 2470 |
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Thread Pitch (Threads Per Inch/ T.P.I.) |
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|
Diameter |
UNC |
UNF |
|
No. 4 |
40 |
48 |
|
No. 5 |
40 |
44 |
|
No. 6 |
32 |
40 |
|
No. 8 |
32 |
36 |
|
No. 10 |
24 |
32 |
|
20 |
28 |
|
|
5/16 |
18 |
24 |
|
3/8 |
16 |
24 |
|
7/16 |
14 |
20 |
|
13 |
20 |
|
|
5/8 |
11 |
18 |
|
10 |
16 |
|
|
7/8 |
9 |
14 |
|
1 |
8 |
12 |
|
1.1/4 |
7 |
12 |
|
1.1/2 |
6 |
12 |
Self Colour, High Tensile 8.8 Material Properties
|
Material/ Finish |
Appearance |
Level of Corrosion Resistance |
Typical Application |
|
High Tensile Steel (10.9) |
Self-Colour (black) |
Low, without further surface treatment |
No exposure to moisture Often Greased/ Oiled |
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 (UN)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.
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.
Image is for illustrative purposes only.
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