1/2” UNC (5/8”) x 4 1/4”, Socket Shoulder Screw, Self-Colour, Grade 12.9, ANSI B18.3

1/2” Socket Shoulder Screw

High-strength engineering screw manufactured to ensure thread and shaft consistency. A self-colour shoulder screw with a shouldered section that functions as a dowel, pivot, or axle, allowing movement around it.

Conforming to ANSI B18.3 standards and manufactured from self-colour, grade 12.9 high tensile steel. Also known as a shoulder bolt and consisting of a socket cap head, an enlarged unthreaded ground shoulder section, and a threaded lower section.

A versatile machine screw ideally suited for heavy duty applications. Supplied with a hex socket which allows fastening with an Allen key / hex drive sees them widely used.

Shoulder Screw Specification:

• Shoulder Length (SL): 4 1/4”
• Shoulder Diameter (SD): 5/8”
• Thread Length (TL): 0.750”
• Thread Diameter (TD): 1/2”
• Thread Pitch: 13
• Head Width (H): Max 0.875” - Min 0.853”
• Head Height (HH): Max 0.375” - Min 0.365”
• Drive Type (DT): Socket 5/16” (0.312")
• Material: Self-Colour, Grade 12.9 steel
• Conformity: ANSI B18.3

These screws are used across many sectors and part of an extensive range of socket machine screws available in stock at Fusion Fixings, all with bulk purchase discounts.

Why choose Fusion Fixings?

With over 40 years of experience in the construction and fixings industry at Fusion Fixings, our aim is to bring you a range of quality, reliable fixings at great prices. With quantities starting from just one to as many as you like, with bulk price offers across a large number of our products.

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