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ASME 18.6

Dimensions of Round Head Type U Metallic Drive Screws

ASME 18.6.3 (T5-1) - 2024 半圆头U型金属驱动（强攻）螺钉

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Dimensional Specifications — ASME 18.6 (mm)

Size	P	e	r	k_max	k_min	s_max	s_min	ds_max	ds_min	k_nominal	ds_nominal
0#	7	0.104	37	0.193	0.086	0.116	0.112	0.096	0.092	0.211	0.075
2#	8	0.136	29	0.264	0.111	0.154	0.15	0.126	0.122	0.285	0.099
4#	8	0.161	20	0.334	0.137	0.182	0.177	0.15	0.146	0.359	0.123
6#	9	0.221	2	0.429	0.17

Related Standards

DIN 7643 - 2005— Compression Couplings - Hollow Screws For Ring-Type Banjos DIN 22424 - 1990— Electrical Apparatus for Potentially Explosive Atmospheres for Mining; Triangle Head Bolts DIN 15237 - 1980— Belt screws，Continuous Mechanical Handling Equipment; Seating Screws and Cupped Washers for The Attachment of Components to Belts DIN 6306 (-1) - 2002— Tommy Screws with Moveable Clamping Bolt - Tommy Screws DIN 48051-1 (SBE) - 1959— Overhead Lines Curved Insulator Supports - Standard Design - SBE JB /T 8026.6 - 1999— Supporters for Screw UNI 7346 - 1974— Round Head Tapping Rivets UNI 7347 - 1974— Countersunk (fiat) Head Tapping Rivets

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