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draw nail
draw nail n. 
/ˈdrɑ ˌneɪl/ †(a) (apparently) a type of nail having a small head (obsolete); (b) (Founding) a small metal spike which is driven into a pattern to help loosen it from its mould (now somewhat rare).
Brit. /ˈdrɔː neɪl/
, /ˈdrɔː neɪl/U.S. /ˈdrɔ ˌneɪl/
, /ˈdrɔ ˌneɪl//ˈdrɑ ˌneɪl/ΚΠ
1702 R. Thoresby Let. 17 June in Philos. Trans. 1704–05 (Royal Soc.) (1705) 24 1864 The Head not round..but somewhat like the modern Draw-nails.
1886 Hub 1 May 100/2 In placing the quarters in the job, be careful to use strong draw-nails in the seaming-lace of the elbows, so as to keep the lace well stretched and firm.
1901 Shop & Foundry Pract. (Colliery Engineer Co.) IV. xxxv. 3 The pattern may be loosened by rapping sidewise on the draw-nail.
1914 Motor Boating Mar. 72/2 If draw nails are placed occasionally in the edge of deck planking.., a stronger job will be obtained.
1960 R. Lister Decorative Cast Ironwork 226 Draw nail, a pointed rod for driving into a pattern to extract it from its mould after ramming. Also called draw spike.
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