Hobson WRH9P037 3/8" H9 Impact Imperial Flat Washer, 43-49 HRC, Plain

This page lists 9 items of the Hobson H9 impact imperial flat washer (plain): 3/8" to 1-1/2".

The supplier lists these as H9 impact flat washers with a hardness range given in HRC, the Rockwell C scale. The supplier information does not explain the H9 name.

The supplier lists a hardness of 43-49 HRC (manufacturer-stated).

Pack quantity varies by size and is shown for each item in the table.

Where this product is used

• Under the nut or bolt head of a bolted joint where a hardened flat washer is specified
• Spreading the clamping load of a bolt over a larger area

Features

• 9 items: 3/8" to 1-1/2"
• Plain
• Hardness 43-49 HRC (manufacturer-stated)
• Pack quantity shown for each item

Common specifications

Key specifications

Selecting the right option

Washer size is the bolt size in inches; check it against the bolt you are using. The supplier information gives no outside diameter or thickness for these items, so check the dimensions with Hobson if they matter for your joint. Plain washers are uncoated, so they suit fittings that are protected another way.

Related products

Related washers: Hobson H9 Impact Washer, 43-49 HRC, Zinc Yellow Passivate, 1/4" to 1-1/2", Hobson Imperial Flat Round Sampson Washer, 38-45HRC, Plain, 1/4" to 3" and Hobson Imperial Flat Round Sampson Washer, 38-45HRC, Xylan Blue, 1/2" to 1-1/2".