PICTURES ARE REPRESENTATIVE OF ITEM, BUT ARE NOT OF THE ACTUAL ITEM. Product dimensions, finish, head markings, thread length, stamping shape or forging shape, etc., may differ from picture. Products are guaranteed to meet the specifications to which they are manufactured. Specifications allow for tolerances in dimension and shape, which can vary from lot to lot.

5/16-18 x 3 1/4 Coarse Thread Socket Head Cap Screw - USA Alloy Steel Black Oxide

Price Per Piece: $2.6979

Part #:: 0000-216979
Minimum Purchase:: 50 pieces

PRODUCT SPECIFICATIONS (Part # 0000-216979)
Fastener Type:	Socket Head Cap Screw - USA
Size Description:	5/16-18 x 3 1/4
Diameter/Nominal Size:	5/16"
Length:	3 1/4"
Wrench Size/Across Flats:	1/4"
Head Diameter:	0.457-0.469"
Head Height:	0.306-0.312"
Thread Pitch:	18
Thread Pitch Type:	Coarse
Thread Direction:	Right
System of Measurement:	Inch
Grade:	170 KSI Alloy Steel (Grade 9)
Material:	Alloy Steel
Finish:	Black Oxide
Head Type:	Cylindrical
Drive Type:	Internal Hex
Average Piece Weight:	0.0766000 lbs.
Country of Manufacture:	United States

The socket screws category contains several different types of fasteners with one thing in common: an internal hex (allen) drive.

Socket head cap screws are used in fastening or clamping components together, die castings, and machine assemblies, among other uses.

Socket flat head cap screws are used in applications where countersinking is desired. Used when a flush finish is required for either safety or appearance requirements.

Socket button head cap screws are used when appearance is a factor, and clamping material is too thin to countersink the screw. Examples are end panels, display shelving, and carts.

Socket shoulder screws are used in many tool and die applications as well as stationary guides, pulley shafts, moving shafts, or pivots.

Socket low head cap screws are used in applications where not enough clearance is available for a standard socket head cap screw.

Set screws are used to fasten shaft collars, gears, and knobs on shafts or where frequent adjustments are involved.

Socket screws are available in a variety of materials, such as high-strength alloy steel, and different stainless steel alloys, and others.