Steel Rules with Inch Gradua tions 1-144" All rules furnished with Starrett satin chrome finish, except where noted.Additional sizes and variations available by special order. Rules include • Full-Flexible • Semi-Flexible • Spring-Tempered • Heavy Spring-Tempered H604R-6 with Reversible Hook Steel Rules Key to Starrett Rule Numbering System Prefixes C Satin Chrome Finish DH Double Hook H Single Hook Suffixes E End Graduations K With Pocket Clip N Narrow-Type Rule R Quick-Reading S Semi-Flexible T Tapered End 1-4" Spring-Tempered Steel Rules with Inch Graduations Cat. No. EDP Length Width x Thickness Graduations Feature Remarks C604R-1* 56464 1" 1/2 x 3/64" 4R – 8ths, 16ths, Quick-Reading 32nds, 64ths C604R-2* 56465 2" C604R-3* 56466 3" 9/16 x 3/64" 4R – 8ths, 16ths, Quick-Reading 32nds, 64ths C604R-4* 56467 4" 5/8 x 3/64" 4R – 8ths, 16ths, Quick-Reading 32nds, 64ths 6" Full-Flexible Steel Rules with Inch Graduations Cat. No. EDP Length Width xThickness Graduations Feature Remarks C303R-6* 51334 6" 1/2 x 1/64" 3R – Quick-Reading 10ths, Aircraft Quick-Reading 50ths, 32nds and 64ths C304R-6* 66008 6" 1/2 x 1/64" 4R – 8ths, 16ths, Quick-Reading 32nds and 64ths C305R-6* 51347 6" 1/2 x 1/64" 5R – Quick-Reading 10ths, Aircraft Quick-Reading 100ths, 32nds and 64ths C305R-6 W/SLC* 66880 With Standard Letter of Certification† C306R-6* 51352 6" 1/2 x 1/64" 6R – One Side Only – Quick-Reading 10ths (.10) Top Edge; Aircraft Quick-Reading 50ths (.02) Bottom Edge C309R-6* 51357 6" 1/2 x 1/64" 9R – 16ths and Quick-Reading 32nds on One Side; Quick-Reading 64ths on Reverse Side C310R-6* 51368 6" 1/2 x 1/64" 10R – Quick-Reading 32nds, 64ths on One Side Only C310K-6* 56701 6" 1/2 x 1/64" 10 – 32nds and 64ths on One Side Only With Pocket Clip C310T-6* 56700 6" 1/2 x 1/64" 10 – 32nds One Side; 64ths on Reverse Side With Tapered End C316R-6* 51374 6" 1/2 x 1/64" 16R – Quick-Reading 32nds, 64ths, Aircraft Quick-Reading 50ths and 100ths 1309R-6* 53204 6" 1/2 x 1/64" 9R – 16ths and Quick-Reading 32nds on One Side; Quick-Reading 64ths on Reverse Side Stainless Steel 6" Semi-Flexible Steel Rules with Inch Graduations Cat. No. EDP Length Width xThickness Graduations Feature Remarks C303SR-6* 51335 6" 3/4 x 1/50" 3R – Quick-Reading 10ths, Aircraft Quick-Reading 50ths, 32nds and 64ths C304SRE-6* 51343 6" 3/4 x 1/50" 4R – 8ths, 16ths, Quick-Reading 32nds and 64ths; End Graduations in 32nds Both Ends, One Side End Graduations † Includes redemption card for Standard Letter of Certification (SLC). *Indicates rules with single row of inch figures (all rules under 1" width).Rules without asterisk have double row of inch figures,and each edge represents the bottom edge reading left to right (rules 1" and wider). 288 P recision R ules , S traight E dges , P arallels