Description
UNF 5/16″, Cap Head, Socket Screw/ Allen Bolt, High Tensile (12.9) BS 2470, BZP Zinc Plated
Fixaball sells all lengths of BZP zinc, 5/16″ UNF hexagon/ allen cap screws.
What is a socket cap screw/ bolt?
The Socket Cap Screw/ Allen Bolt, term is used to describe a fastenerthat 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 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‘No. of Items in Pack’, ‘Length’and‘Quantity’of packs, selection from the drop down menus.
5/16″, UNF hexagon/ allen cap screw lengths available
FT – Fully Threaded
PT – Partially Threaded
| Description |
| 5/16″-24×3/4″,(FT) SOCKET HEAD CAP SCREW UNF 1960 ZINC-BAKE CR+3 |
| 5/16″-24×1″,(FT) SOCKET HEAD CAP SCREW UNF 1960 ZINC-BAKE CR+3 |
| 5/16″-24×1 1/4″,(FT) SOCKET HEAD CAP SCREW UNF 1960 ZINC-BAKE CR+3 |
| 5/16″-24×1 1/2″,(FT) SOCKET HEAD CAP SCREW UNF 1960 ZINC-BAKE CR+3 |
| 5/16″-24×1 3/4″,(PT) SOCKET HEAD CAP SCREW UNF 1960 ZINC-BAKE CR+3 |
| 5/16″-24×2″,(PT) SOCKET HEAD CAP SCREW UNF 1960 ZINC-BAKE CR+3 |
| 5/16″-24×2 1/4″,(PT) SOCKET HEAD CAP SCREW UNF 1960 ZINC-BAKE CR+3 |
| 5/16″-24×2 1/2″,(PT) SOCKET HEAD CAP SCREW UNF 1960 ZINC-BAKE CR+3 |
|
Fixaball Specialist Fixings and Fasteners UNC/ UNF Socket Cap Screws Conforming to ASME/ ANSI B18.3 1960 Series All measurements in Inches |
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Pitch TPI |
Head Diameter |
Shank Diameter |
Head Height |
Hex Key Size |
||
|
Diameter |
UNC |
UNF |
Max |
Max |
Max |
Nom |
|
5/16 |
18 |
24 |
0.44 |
0.31 |
0.31 |
7/32 |
High Tensile 12.9 Grade.
Finish: BZP Zinc Cr3 Plated.
|
Material/ Finish |
Appearance |
Level of Corrosion Resistance |
Typical Application |
|
High Tensile Steel – Zinc |
Bright Shine Blue to Yellow |
Internal |
Low exposure to moisture |
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 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.
Image is for illustrative purposes only
