Round Head Bolts Price - ASTM F436 F436M Hardened Steel Washers – Dingshen Metalworks

Round Head Bolts Price - ASTM F436 F436M Hardened Steel Washers – Dingshen Metalworks

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ASTM F436 F436M Hardened Steel Washers Hardened Circular, Clipped Circular, and Extra-Thick Washers, Beveled Washers Metric Size: M12-M100  Inch Size: 1/4”-4” Material Grade: Through hardened washers shall have a hardness of 38 to 45 HRC, except when zinc-coated by the hot-dip process, in which case they shall have a hardness of 26 to 45 HRC. Metric washers are suitable for use with fasteners covered in Specifications A 325M, A 490M, A 563M and with fasteners of Specification F 568 property c...


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Round Head Bolts Price - ASTM F436 F436M Hardened Steel Washers – Dingshen Metalworks Detail:

ASTM F436 F436M Hardened Steel Washers

Hardened Circular, Clipped Circular, and Extra-Thick Washers, Beveled Washers

Metric Size: M12-M100 

Inch Size: 1/4”-4”

Material Grade: Through hardened washers shall have a hardness of 38 to 45 HRC, except when zinc-coated by the hot-dip process, in which case they shall have a hardness of 26 to 45 HRC.

Metric washers are suitable for use with fasteners covered in Specifications A 325M, A 490M, A 563M and with fasteners of Specification F 568 property classes 8.8 and higher.

Inch washers are suitable for use with fasteners covered in Specifications A325, A 354, A 449, and A 490.

Finish: Black Oxide, Zinc Plated, Hot Dip Galvanized, Dacromet, and so on

Packing: Bulk about 25 kgs each carton, 36 cartons each pallet

Advantage: High Quality and Strict Quality Control, Competitive price,

Timely delivery; Technical support, Supply Test Reports

Please feel free to contact us for more details.


Product detail pictures:

Round Head Bolts Price - ASTM F436 F436M Hardened Steel Washers – Dingshen Metalworks detail pictures

Round Head Bolts Price - ASTM F436 F436M Hardened Steel Washers – Dingshen Metalworks detail pictures

Round Head Bolts Price - ASTM F436 F436M Hardened Steel Washers – Dingshen Metalworks detail pictures

Round Head Bolts Price - ASTM F436 F436M Hardened Steel Washers – Dingshen Metalworks detail pictures

Round Head Bolts Price - ASTM F436 F436M Hardened Steel Washers – Dingshen Metalworks detail pictures


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    The LoaDisc is an economical low profile reaction washer with an inner thread segment that is placed underneath a standard heavy hex nut. It provides controlled surface friction that enhances bolt load accuracy. Using this simple washer removes frictional losses due to flange surface condition while it eliminates side loading and bending losses due to external reaction points.

    The HYTORC machine and driver is equipped with an inner and outer socket. The nut is dry-lubed to reduce the usual frictional scatter. The inner socket turns the nut while the outer socket locks onto the LoaDisc underneath the nut. This allows safe, hands-free operation in any position (including inverted) and a reliable facial friction of the nut is assured.

    Action and reaction become coaxial. The usual friction-causing side load is eliminated.

    A threaded segment in the inside of the LoaDisc creates a counter nut effect with the nut thread. It stops the bolt from turning with the nut! Further turning of the nut creates an axial bolt elongation which pulls along the threaded segment in the inside of the washer.

    The counter nut effect remains intact throughout the assembled state of the fastener… so that despite the use of a low-friction, dry lubricant, inadvertent nut loosening even under vibration is eliminated!

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