Occupation standard of series of fountain pen component

Series of fountain pen component
Fountain Pen's ComponentsAnd Parts Series GB8111-87
This series standard applies to fountain pen main component concerns the norms measure that coordinates place.
1 classification and scope of application
Cent of 1.1 series standard is general component series, bright needle series, dark needle series, whorl watch and thread are common be not cooperate series of watch, other component.
Series of 2 general components

Apply to each type fountain pen. Graph １
2.1 clip screw (see a picture 1, watch 1)Express １ Mm

Set number	D	Tolerancepublic errand
1	M4.2 × 0.7	, 0.1
2	M4.7 × 0.7
3	M4.7 × 1
4	M5.3 × 1

2.2 stretch pen clip (see a picture 2, watch 2)

Graph 2
Express 2 Mm

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Set number	D	Tolerancepublic errand
1	6.7	, 0.1
2	7.2