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UNC 1/4 Socket Cap Screw A2 304 Stainless Steel DIN912

UNC 1/4 Socket Cap Screw A2 304 Stainless Steel DIN912

£3.31
£3.31
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About this product :

UNC 1/4" (20 T.P.I.), Coarse Pitch, A2/ 304 Stainless Steel, Allen/ Hexagon Socket, Cap Head, Allen Bolt, DIN 912, ISO 4762, BS 2470

Fixaballsells all lengths of 1/4" UNC, socket cap screws/ bolts.

What is a socket cap screw/ bolt?

The, ‘Socket Cap Screw/ Allen Bolt,’ term is used to describe a enerthat 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 ener 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 eners’ head. Here, you can use a hexagon key (Allen Key) to tighten and loosen the ener. 'Cap' refers to the cylindrical shaped head.

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

Standard, is Royal Mail, 2nd Class (2-5 days, most likely 2 days). For a er delivery time, select 1st class or courier at checkout.

Please make your'No. of Items in Pack', 'Length'and'Quantity'of packs, selection from the drop down menus.

UNC, 1/4" A2/ 304 Stainless Steel, Allen Socket, Cap Head Screw/ Bolt lengths available:

(FT- Fully Threaded,PT- Partially Threaded)

Size Description
1/4"-20x1/4",(FT)
1/4"-20x1/2",(FT)
1/4"-20x5/8",(FT)
1/4"-20x3/4",(FT)
1/4"-20x7/8",(FT)
1/4"-20x1",(FT)
1/4"-20x1 1/4",(PT)
1/4"-20x1 3/4",(PT)
1/4"-20x2",(PT)
1/4"-20x2 1/4",(PT)
1/4"-20x2 1/2",(PT)
1/4"-20x3",(PT)
1/4"-20x3 1/2",(PT)
1/4"-20x4",(PT)
1/4"-20x6",(PT)

Material:A2/ 304 Stainless Steel

Material/ Finish

Appearance

Level of Corrosion Resistance

Typical Application

Self Colour A2/ 304 Stainless Steel

Dull Shine, Grey

High

- External Weathering not prone to chemical exposure e.g. salt water

UNIFIED THREAD STANDARDS

The basic American standards for ening 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 ening 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 eners 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.


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| Updated: 15th July 2025

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