Hi Craig

Looking in the period spares lists (1940 contract C6126)

Carrier securing bolt B751/11
Carrier securing bolt nut EB113/1
Upright stay top bolt K132A/11
Upright stay top bolt nut M263/11

From the 1939 civy spares list

B751 1/4" x 4/6 1/4"
EB113 1/4"
K132A 1/4" x 1/2"
M263 1/4"

/1 Cadmium
/11 Khaki Green (No.3 Gas Proof)

email (option): robmiller11(a)yahoo.co.uk

Thank you both: that's really helpful.

Onwards!....