Hobson BHG8PC1500450 1-1/2" x 4-1/2" UNC Hex Bolt, Grade 8, Plain

This page lists 104 Hobson UNC hex bolt items in grade 8, plain finish: sizes 1/4" to 2", with lengths from 3/4" to 15". Each item is shown with its Hobson part number, size, length and the pack quantity the supplier states.

Hobson lists grade 8 as high tensile, and its class and grade chart pairs imperial grade 8 with metric class 10.9 (manufacturer-stated).

The Hobson acronym list defines UNC as Unified National Coarse Thread and TPI as threads per inch (manufacturer-stated). The threads per inch shown are from the Hobson thread table, for the sizes it lists.

For the items it lists, the Hobson High Tensile Stock List, April 2011 gives the heading Grade 8 AS2465 (manufacturer-stated). Items not in that list show no standard.

The stock list also gives a pack weight for the items it lists (manufacturer-stated). Pack weights are shown only where the stock list pack quantity matches the supplier pack quantity.

Proof load and minimum tensile strength come from the Hobson head-marking guide for the class or grade and size range (manufacturer-stated): sizes the table does not cover show no figure.

Spanner sizes (A/F) are from the Hobson spanner selection chart (manufacturer-stated).

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

Items marked Each are sold singly; the supplier gives no pack quantity for them.

Where this product is used

• Used with a matching nut, or screwed into a tapped hole, to join or fix parts
• Hex head tightened with a spanner or socket
• Choose length and thread form to suit the parts being joined

Features

• 15 sizes: 1/4" to 2"
• Grade 8, Plain finish
• Lengths from 3/4" to 15"
• Pack quantity and part number for every item
• Proof load and minimum tensile strength by size, from the Hobson guide (manufacturer-stated)
• Spanner size (A/F) by size, from the Hobson spanner chart (manufacturer-stated)

Common specifications

Thread, strength and spanner size by diameter

Values in this table are from the Hobson thread table, strength guide and spanner chart, and apply to the size and class or grade shown (manufacturer-stated). A dash means the Hobson sources give no figure for that size.

Key specifications

Selecting the right option

Choose the thread form first: the nut must match the bolt in thread form, diameter and pitch. Sizes are nominal diameters in inches; compare the threads per inch in the table with your nut. Length is measured from under the head to the end of the bolt. Strength figures are the class or grade minimums from the Hobson head-marking table, so treat them as the minimum for the class or grade and not a test result for the item (manufacturer-stated). For a bolt and nut set: see Hobson UNC Hex Bolt and Nut, Grade 8, Plain, 5/16" to 1-1/2" x 3/4" to 10".

Related products

Related hex bolts: Hobson UNC Hex Bolt, Grade 8, Plain, 1/4" to 2" x 3/4" to 15", List A, Hobson UNC Hex Bolt and Nut, Grade 8, Plain, 5/16" to 1-1/2" x 3/4" to 10" and Hobson UNC Hex Bolt, Grade 5, Plain, 1/4" to 7/16" x 3/4" to 6".