UNC 3/8", Socket Screw, Cap, High Tensile/ 12.9, Self Colour, DIN 912.

UNC, 3/8" (16 T.P.I.), Coarse Pitch, High Tensile (Grade 'S'/ 12.9), Self Colour DIN 912. Allen (hex) Socket, Cap Head, Allen Bolt, ISO 4762, BS 2470 Fixaball sells lengths of 3/8", UNC, cap screw...
£2.89

UNC, 3/8" (16 T.P.I.), Coarse Pitch, High Tensile (Grade 'S'/ 12.9), Self Colour DIN 912. Allen (hex) Socket, Cap Head, Allen Bolt, ISO 4762, BS 2470

Fixaball sells lengths of 3/8", UNC, cap screw bolts.

What is a socket cap screw/ bolt?

The, ‘Socket Cap Screw/ Allen Bolt,’ term is used to describe a fastener that is either fully or partially threaded. A screw is fully threaded and a bolt is partialy threaded. Some engineers may call them screws if the person uses the shorter length range of sizes. The thread stays the same length as the fastener gets longer and the maximum length of thread is equal to 2.5 times the diameter (or thereabouts). ‘Socket,’ refers to the hexagon shaped indentation found on the top of the fasteners’ head. Here, you can use a hexagon key (Allen Key) to tighten and loosen the fastener. 'Cap' refers to the cylindrical shaped head.

 

Orders placed before 2pm are 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. 

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

UNC, 3/8" Allen Socket, Cap Head Screw/ Bolt lengths at Fixaball:

3/8"-16x3/8",(FT) SOCKET HEAD CAP SCREWS UNC S/COLOUR 1936-1960
3/8"-16x1/2",(FT) SOCKET HEAD CAP SCREWS UNC S/COLOUR 1936-1960
3/8"-16x3/4",(FT) SOCKET HEAD CAP SCREWS UNC S/COLOUR 1936-1960
3/8"-16x1",(FT) SOCKET HEAD CAP SCREWS UNC S/COLOUR 1936-1960
3/8"-16x1 1/2",(FT) SOCKET HEAD CAP SCREWS UNC S/COLOUR 1936-1960
3/8"-16x1 3/4",(PT) SOCKET HEAD CAP SCREWS UNC S/COLOUR 1936-1960
3/8"-16x2",(PT) SOCKET HEAD CAP SCREWS UNC S/COLOUR 1936-1960
3/8"-16x2 1/4",(PT) SOCKET HEAD CAP SCREWS UNC S/COLOUR 1936-1960
3/8"-16x2 1/2",(PT) SOCKET HEAD CAP SCREWS UNC S/COLOUR 1936-1960
3/8"-16x2 3/4",(PT) SOCKET HEAD CAP SCREWS UNC S/COLOUR 1936-1960
3/8"-16x3",(PT) SOCKET HEAD CAP SCREWS UNC S/COLOUR 1936-1960
3/8"-16x3 1/4",(PT) SOCKET HEAD CAP SCREWS UNC S/COLOUR 1936-1960
3/8"-16x3 1/2",(PT) SOCKET HEAD CAP SCREWS UNC S/COLOUR 1936-1960
3/8"-16x3 3/4",(PT) SOCKET HEAD CAP SCREWS UNC S/COLOUR 1936-1960
3/8"-16x4 1/4",(PT) SOCKET HEAD CAP SCREWS UNC S/COLOUR 1936-1960
3/8"-16x4 3/4",(PT) SOCKET HEAD CAP SCREWS UNC S/COLOUR 1936-1960
3/8"-16x5 1/2",(PT) SOCKET HEAD CAP SCREWS UNC S/COLOUR 1936-1960
3/8"-16x6",(PT) SOCKET HEAD CAP SCREWS UNC S/COLOUR 1936-1960
3/8"-16x6 1/2",(PT) SOCKET HEAD CAP SCREWS UNC S/COLOUR 1936-1960
3/8"-16x7",(PT) SOCKET HEAD CAP SCREWS UNC S/COLOUR 1936-1960
3/8"-16x7 1/2",(PT) SOCKET HEAD CAP SCREWS UNC S/COLOUR 1936-1960
3/8"-16x8",(PT) SOCKET HEAD CAP SCREWS UNC S/COLOUR 1936-1960
3/8"-16x9",(PT) SOCKET HEAD CAP SCREWS UNC S/COLOUR 1936-1960
3/8"-16x10",(PT) SOCKET HEAD CAP SCREWS UNC S/COLOUR 1936-1960

 

 

High Tensile – 12.9 Grade.

Available Finish: Plain/ Black/ Self Colour 

 

Fixaball – Specialist Fixings and Fasteners

UNC/ UNF Hexagon Socket Cap Screws

Conforming to ASME/ ANSI B18.3 1960 Series

 

Pitch TPI

a

ds

h

j

Diameter

UNC

UNF

Max

Max

Max

Nom

No. 4

40

48

0.18

0.11

0.11

5/16

No. 5

40

44

0.21

0.13

0.13

3/32

No. 6

32

40

0.23

0.14

0.14

3/32

No. 8

32

36

0.27

0.16

0.16

1/8

No. 10

24

32

0.31

0.19

0.19

5/32

¼

20

28

0.38

0.25

0.25

3/16

5/16

18

24

0.44

0.31

0.31

7/32

3/8

16

24

0.56

0.38

0.38

5/16

7/16

14

20

0.63

0.44

0.44

5/16

½

13

20

0.75

0.50

0.50

3/8

5/8

11

18

0.88

0.63

0.63

½

¾

10

16

1.00

0.75

0.75

9/16

7/8

9

14

1.13

0.88

0.88

9/16

1

8

12

1.31

1.00

1.00

5/8

1.1/4

7

12

1.75

1.25

1.25

¾

1.1/2

6

12

2.00

1.50

1.50

1

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.

 

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