Product Description
Original Item: Head only, size 1
Great post on No4 bolt sizes from gunboards forum:
http://forums.gunboards.com/showthread.php?318777-No4-Bolt-Head-Survey-and-Instructions
"It seems to be generally accepted that No4 / No5 bolt heads should fall in the following range :
Size 0 = 0.620” – 0.625”
Size 1 = 0.625” – 0.630”
Size 2 = 0.630” – 0.635”
Size 3 = 0.635” – 0.640”
a) From “Parts Identification List Rifle No4 Mk1 and Mk1*” dated 1945
Bolt head 0 part number BB8584
Bolt head 1 part number BB8585
Bolt head 2 part number BB8586
Bolt head 3 part number BB8587"