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ASME B 18.21

Double Coil Helical Spring Lock Washers for Wood Structures

ASME B 18.21.3 - 2008 (R2013) 木结构用双层弹簧垫圈 [Table 1]

See all versions and complete specifications: Double Coil Helical Spring Lock Washers for Wood Structures — Full Specification Page

Dimensional Specifications — ASME B 18.21 (mm)

Size	P	r	k_max	k_min	s_max	s_min	ds_max	ds_min	k_nominal	ds_nominal
1/2	0.7500	0.234	30°	35°	0.760	0.791	0.302	0.220	1.415	0.785
3/8	0.5000	0.156	30°	35°	0.510	0.535	0.243	0.145	1.035	0.530
5/8	1.0000	0.250	30°	35°	1.010	1.040	0.437	0.229	1.928	0.860

Related Standards

GB /T 93 - 1987— Single Coil Spring Lock Washers, Normal Type GB 93 - 1976— Single Coil Spring Lock Washers, Normal Type GB /T 859 - 2025— Single Coil Spring Lock Washers - Light Type GB 9074.26 - 1988— Single Coil Spring Lock Washer for Assembly GB /T 7244 - 1987— Single Coil Spring Lock Washers Heavy Type GB /T 859 - 1987— Single Coil Spring Lock Washers, Light Type DIN 127 (B) - 1987— Spring Lock Washers - Type B, with Square Ends DIN 7980 - 1987— Spring Lock Washers with Square Ends for Cheese Head Screws

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