ENGINEERING DRAWING STANDARDS MANUAL - NASA

1 GSFC X-673-64-1F. ENGINEERING DRAWING . STANDARDS MANUAL . August 1994. ICS AND SPA. C. UT. E. A. AD. N. AERO. M. INISTRA. O NAL. TIO. TI. N. NA. U. S. A. X-673-64-1F. Supersedes GSFC X-673-64-1E/July 1991. ENGINEERING DRAWING . STANDARDS MANUAL . Mechanical ENGINEERING Branch Goddard Space Flight Center Greenbelt, Maryland August 1994. AND SPA. TICS C. U. E. A. AD. AL AERON. M. INISTRA. ON. TIO. TI. N. NA. U. S. A. National Aeronautics and Space Administration Goddard Space Flight Center Greenbelt, Maryland 20771. 1994. DESCRIPTION OF REVISION. T h i s r e v i s i o n , w h i c h s u p e r s e d e s t h e G o d d ar d S p a c e F l i g h t C e n t e r ( G S F C ) S t a n d a r d X - 6 7 3 - 6 4 - 1 E , E n g in e e r in g D r a win g S ta n d a r d s M a n u a l, is in te n d e d to u p d a te a n d r e f le c t th e la te s t f o r ma ts a n d s ta n d a r d s a d o p te d b y G S F C.

2 T h e f o llo w in g is a s u mma r y o f th e p r in c ip a l c h a n g e s a n d imp r o v e me n ts in c o r p o r a te d in this issue: a. A d d itio n o f Co mp o s ite Ma te r ia l D r a w in g d e f in itio n . b . C h a n g in g o f t h e s i g n a t u r e t o a p r i n t e d n a me i n T i t l e b lo c k s . c. N e w e x a mp l e o f t h e M e t r i c D r a w i n g s f o r ma t a n d t o l e r a n c e p r e s e n t a t i o n . d . I mp r o v e d p l a c e me n t o f v i e w s o n T y p e s o f D r a w i n g s s a mp l e s t o p r e v e n t u n n e c e s s a r y r e w o r k o f d r a w in g s a t a la te r d a te.

3 E. N e w E n g in e e r i n g O r d e r ( E O ) f o r ms a d d e d ; o ld E O f o r ms w i l l b e p h a s e d o u t. f. A d d itio n a l n o te s o n v a r io u s to p ic s a d d e d to N o te E x a mp le s s e c tio n . g . D e le tio n o f mic r o f ilmin g r e q u ir e me n ts f o r d r a w in g f o r ma t. h . F lo w c h a r t f o r f lig h t p r o j e c ts r e d e f in e d . iii iv PREFACE. T h e G S F C E n g in e e r in g D r a win g S ta n d a r d s M a n u a l i s t h e o f f i c i a l s o u r c e f o r t h e r e q u ir e me n ts a n d in te r p r e ta tio n s to b e u s e d in th e d e v e lo p me n t a n d p r e s e n ta tio n o f e n g in e e r in g d r a w in g s a n d r e la te d d o c u me n ta tio n f o r th e G S F C.

4 T h e M e c h a n i c a l E n g i n e e r i n g B r a n c h , M e c h a n i c a l S y s t e ms D iv is io n , h a s b e e n d e le g a te d t h e r e s p o n s i b i l i t y f o r i n t e r p r e t a t i o n , p e r i o d ic u p d a t e s , a n d d i s t r ib u t i o n o f t h e G S F C. E n g in e e r in g D r a win g S ta n d a r d s M a n u a l. A ll E n g in e e r in g D ir e c to r a te d e s ig n o r g a n iz a tio n s a n d th e ir c o n tr a c to r s s h a ll a d h e r e to th e r e q u ir e me n ts o f th is ma n u a l w h e n p r e p a r in g G S F C e n g in e e r in g d o c u me n ta tio n f o r f lig h t h a r d w a r e a n d g r o u n d s u p p o r t s ys te ms.

5 Co mme n ts o r in q u ir ie s c o n c e r n in g th is ma n u a l s h o u ld b e d ir e c te d to th e Me c h a n ic a l E n g in e e r in g Br a n c h , Co d e 7 2 2 . D r . A lla n S h e r ma n D ir e c to r o f E n g in e e r in g v vi ENGINEERING DRAWING STANDARDS MANUAL vii TABLE OF CONTENTS. INTRODUCTION .. 1. 1. DRAWING ELEMENTS .. 3. DRAWING Sizes .. 3. Multisheet drawings .. 3. Zoning .. 4. 1 . 4 . T i t l e B l o c k an d R e v i s i o n B l o c k .. 4. 1 . 5 . D r a w i n g F o r ma t .. 1 0. 2. NOMENCLATURE .. 11. DRAWING Title .. 11. Abbreviations .. 12. List of Material.

6 14. 2 . 3 . 1 . R e q u i r e me n t s o n t h e B o d y o f t h e D r a w i n g .. 1 4. 2 . 3 . 2 . R e q u i r e me n t s i n t h e L i s t o f M a t e r i a l .. 1 4. Notes on drawings .. 15. 2 . 4 . 1 . S e c u r i t y C l a s s i f i c at i o n .. 1 5. Note 15. 2 . 4 . 3 . N u mb e r i n g o f N o t e s .. 1 6. 2 . 4 . 4 . N o t e E x a mp l e s .. 1 6. 2 . 4 . 4 . 1 . D i me n s i o n N o t e s .. 1 6. Heat Treating 17. 2 . 4 . 4 . 3 . J o i n i n g Me t h o d N o t e s ( w e l d i n g , b r a z i n g , e t c . ) .. 1 8. Plating and Coating Notes .. 18. Surface Preparation Notes.

7 19. Testing and Inspection Notes .. 20. Threaded Inserts Cleaning and Installation Notes .. 20. Miscellaneous Notes .. 21. 2 . 4 . 4 . 9 . I n f o r ma t i o n a l N o t e s .. 2 3. Local Character Notes .. 23. 2 . 4 . 6 . G e n e r a l D i me n s i o n a l T o l e r a n c e N o t e s .. 2 3. 2 . 5 . S p e c i f i c a t io n C a l l o u t s .. 2 3. 3. DRAFTING PRACTICES .. 25. General .. 25. Lines .. 25. Ink Lines and Plotted Lines .. 25. Pencil Lines .. 27. Types of 27. Center Lines .. 27. 3 . 2 . 3 . 2 . D i me n s i o n L i n e s .. 2 8. Leaders .. 28. Break Lines .. 28. Phantom Lines.

8 29. Sectioning Lines .. 29. Extension Lines .. 30. Hidden Lines .. 30. Stitch Lines .. 30. Outlines or Visible 30. Datum Lines .. 30. 3 . 2 . 3 . 1 2 . C u t t i n g - P l a n e / V ie w i n g - P l a n e L i n e s .. 3 0. 3 . 3 . L e t t e r i n g a n d N u me r a l s .. 3 1. Style .. 31. Heights .. 32. Scale .. 32. Positioning the Part on the DRAWING .. 33. X-673-64-1F G O D D AR D S P AC E F L I G H T C E N T E R , G r e e n b e l t , M a r y l a n d viii ENGINEERING DRAWING STANDARDS MANUAL . Picturization .. 33. Sections .. 34. Views .. 36. 37. 3 . 5 . 5 . I d e n t i f i c a t i o n o f S e ct i o n s , V i e w s , a n d D e t a i l s.

9 3 7. 3 . 5 . 6 . L o c a t i n g S e c t i o n s, V i e w s , a n d D e t a i l s .. 3 8. 4. TYPES OF drawings .. 39. Altered or Selected Vendor Part DRAWING .. 39. 4 . 2 . A s s e mb l y D r a w i n g .. 4 0. Detail DRAWING .. 41. DRAWING Tree .. 42. 4 . 5 . E l e c t r i c a l / E l e c tr o n i c D r a w i n g s .. 4 3. 4 . 5 . 1 . E l e c t r i c a l a n d E l e c t r o n i c S y mb o l s .. 4 3. 4 . 5 . 2 . E l e c t r i c a l a n d E l e c t r o n i c D i a g r a ms .. 4 3. 4 . 6 . I n s e p a r a b l e A s s e mb l y D r a w i n g .. 4 4. 4 . 7 . I n s t a l l a t i o n A s s e mb l y D r a w i n g.

10 4 5. Interface Control DRAWING .. 46. Matched-Set DRAWING .. 48. 4 . 1 0 . M e c h a n i c a l S c h e ma t i c .. 4 9. Modification DRAWING .. 51. Outline DRAWING .. 51. Source Control DRAWING .. 53. 4 . 1 4 . S p e c i f i c a t i o n Co n t r o l D r a w i n g .. 5 4. Standard Part DRAWING .. 56. Tabulated DRAWING .. 56. Tooling DRAWING .. 57. 4 . 1 8 . C o mp o s i t e M a t e r i a l D r a w i n g .. 5 8. 5. NUMBERING SYSTEM FOR drawings AND SUPPORTING DOCUMENTATION . 60. 5 . 1 . P a r t N u mb e r i n g .. 6 1. 5 . 2 . F i n d o r I t e m N u mb e r i n g .. 6 2. Order of Precedence of Specifications and STANDARDS .