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BS 7644

Direct Tension Indicators - Compressible Washers

BS 7644-1 - 1993 压紧垫圈指示器（DTI垫圈）

See all versions and complete specifications: Direct Tension Indicators - Compressible Washers — Full Specification Page

Dimensional Specifications — BS 7644 (mm)

Size	P	k_max	k_min	s_max	s_min	k_nominal
M12	16.8	3	6	17.5	31	36.5
M16	23	4	7	23.8	43	48.5
M20	28	4	7	29	54	60
M22	34	4	7.5	35	67	76
M24	37.2	4	7.5	38	77	83

Related Standards

GB /T 1231 (washer) - 2024— High Strength Plain Washers for Steel Structural GB /T 3632 (H) - 2008— Torshear Type Plain Washer for Steel Structures GB /T 1230 - 2006— High Strength Plain Washers for Steel Structural GB /T 18230.5 - 2000— Plain Washers for High-strength Structural Bolting Hardened and Tempered GB /T 3632 (W) - 1995— Torshear Type Plain Washer for Steel Structures GB /T 1230 - 1991— High Strength Plain Washers for Steel Structures GB /T 32076.11 - 2024— High-strength Structural Bolting Assemblies for Preloading Part 11: Load Indicating Washer GB /T 32076.11 (HN) - 2024— High-strength Structural Bolting Assemblies for Preloading Part 11: Nut Face Washers (HN)

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