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Compressible Washer-Type Direct Tension Indicators (ASTM F959/F959M)

ASME B 18.2.6 - 2019

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Nominal Diameter
d

1/2

5/8

3/4

7/8

1-1/8

1-1/4

1-3/8

1-1/2

d	min
	max
d₁	Protrusion Tangential Diameter	max
h	min
H	max
d_c	Type 325-1,325-3	min
		max
	Type 490-1,490-3	min
		max

0.523	0.651	0.783	0.914	1.043	1.174	1.306	1.437	1.568
0.527	0.658	0.790	0.921	1.052	1.183	1.315	1.446	1.577
0.788	0.956	1.125	1.294	1.463	1.631	1.800	1.969	2.138
0.104	0.126	0.126	0.142	0.158	0.158	0.158	0.158	0.158
0.180	0.220	0.240	0.260	0.270	0.280	0.280	0.280	0.280
1.031	1.281	1.437	1.718	1.937	2.187	2.437	2.687	2.937
1.187	1.375	1.625	1.875	2.000	2.250	2.500	2.750	3.000
1.031	1.281	1.437	1.718	1.937	2.187	2.437	2.687	2.937
1.375	1.625	1.750	2.000	2.250	2.500	2.750	3.000	3.250

①,Type 325-1—DTIs for use with Specification F3125 Grade A325 Type 1 bolts or Grade F1852 assemblies.
Type 325–3—DTIs for use with Specification F3125 Grade A325 Type 3 bolts or Grade F1852 Type 3 assemblies.
（ASTM F959/F959M − 17a）
②,Type 490–1—DTIs for use with Specification F3125 Grade A490 Type 1 bolts or Grade F2280 assemblies.
Type 490–3—DTIs for use with Specification F3125 Grade A490 Type 3 bolts Grade F2280 Type 3 assemblies.
（ASTM F959/F959M − 17a）
③,Material and Properties shall conform to the requirement of ASTM F959

Alternative history

ASME B 18.2.6 - 2006 ASME B 18.2.6 - 2010 ASME B 18.2.6 - 2019

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Similar Standards

1	[DIN] DIN 433 (-1) - 1990	Product Grade A, Up To Hardness 250 Hv, Primarily For Cheese Head Screws
2	[EN] EN 14399 (-9 HB washer) - 2009	High-strength structural bolting assemblies for preloading - Part 9: System HR or HV — Bolt face washers (HB)
3	[EN] EN 14399 (-9 DTI) - 2018	High-strength structural bolting assemblies for preloading - Part 9: System HR or HV — Direct tension indicators for bolt and nut assemblies
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