UNF 7/16", Socket Screw, Countersunk, High Tensile 10.9, DIN 7991

UNF 7/16", Socket Screw, Countersunk, High Tensile 10.9, DIN 7991 UNF, 7/16" (20 T.P.I.), Fine Pitch, High Tensile (Grade 10.9), Self Colour. Allen (hex) Socket, Countersunk Head, Allen Screw/ Bolt, ISO 10642, B18.3, BS...
£4.31

UNF 7/16", Socket Screw, Countersunk, High Tensile 10.9, DIN 7991

UNF, 7/16" (20 T.P.I.), Fine Pitch, High Tensile (Grade 10.9), Self Colour. Allen (hex) Socket, Countersunk Head, Allen Screw/ Bolt, ISO 10642, B18.3, BS 2470

Fixaball sells all lengths of 7/16", UNF, countersunk socket screw bolts at the best internet prices with free delivery (Royal Mail 2nd Class). Postage upgrades available at checkout.

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

Please make your ‘Number of Items in Pack', 'Length' and ‘Quantity’ (of packs) selections from the drop down menus.

UNF, 7/16" Allen Socket, Countersunk Screw/ Bolt lengths at Fixaball:

 FT - Fully Threaded

PT - Partially Threaded

7/16"-20x3/4",(FT) SOCKET COUNTERSUNK HEAD SCREWS UNF ALLOY SELF COLOUR
7/16"-20x1",(FT) SOCKET COUNTERSUNK HEAD SCREWS UNF ALLOY SELF COLOUR
7/16"-20x1 1/4",(FT) SOCKET COUNTERSUNK HEAD SCREWS UNF ALLOY SELF COLOUR
7/16"-20x1 3/4",(FT) SOCKET COUNTERSUNK HEAD SCREWS UNF ALLOY SELF COLOUR
7/16"-20x2",(FT) SOCKET COUNTERSUNK HEAD SCREWS UNF ALLOY SELF COLOUR
7/16"-20x2 1/2",(PT) SOCKET COUNTERSUNK HEAD SCREWS UNF ALLOY SELF COLOUR

 

Countersunk Head, Allen/ Hexagon Socket Screw/ 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.

High Tensile – 10.9 Grade.

Available Finish: Plain/ Black/ Self Colour 

Fixaball – Specialist Fixings and Fasteners

UNC/ UNF Countersunk Socket Screw/ Bolt Diameters and T.P.I.'s

Conforming to ISO 10642, B18.3, BS 2470

 

Thread Pitch (Threads Per Inch/ T.P.I.)

Diameter

UNC

UNF

No. 4

40

48

No. 5

40

44

No. 6

32

40

No. 8

32

36

No. 10

24

32

¼

20

28

5/16

18

24

3/8

16

24

7/16

14

20

½

13

20

5/8

11

18

¾

10

16

7/8

9

14

1

8

12

1.1/4

7

12

1.1/2

6

12

 

 

Self Colour, High Tensile 10.9 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 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) 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.

Image is for illustrative purposes only.