1、 WORLDWIDE FASTENER STANDARDWM 921 2009 12 08 Printed copies are uncontrolled Copyright 2009, Ford Global Technologies, LLC Page 1 of 2 DIMENSIONAL REQUIREMENTS FOR METRIC PORT 1. SCOPE This specification describes the dimensional requirements for metric ports to be used with stud or plug ends per W
2、M200, ISO 6149-2, ISO 6149-3, and ISO 6149-4. The port dimensions in this standard conform to ISO 6149-1 and SAE J2244/1 except: Angle tolerance for use with plug which seats on the angled surface Drill depth increased to accommodate modified bottom tap in place of bottom tap Identification groove i
3、s not permitted Addition of M30 size per SAE J2244/1 1.1 REFERENCES ISO 261:1998, ISO general-purpose metric screw threads General plan ISO 4759-1:2000, Tolerances for fasteners Part 1: Bolts, screws, studs and nuts Product grades A, B and C ISO 6149-1, Connections for fluid power and general use Po
4、rts and stud ends with ISO 261 metric threads and O-ring sealing Part 1: Ports with truncated housing for O-ring seal ISO 6149-2, Connections for fluid power and general use Ports and stud ends with ISO 261 metric threads and O-ring sealing Part 2: Dimensions, design, test methods and requirements f
5、or heavy-duty (S series) stud ends ISO 6149-4:2006, Connections for fluid power and general use Ports and stud ends with ISO 261 metric threads and O-ring sealing Part 4: Dimensions, design, test methods and requirements for external hex and internal hex port plugs. 2. DIMENSIONS Port dimensions Sha
6、ll conform to the dimensions shown in Table 1. No burr permitted at junction of sealing surface and counter-sink. If a single tool generates the angle, Z, and tap drill at the same time the angle run-out verification is not required. 3. DESIGNATION ON PRINT Recommended print call-out: Unspecified po
7、rt dimensions per WM921 M27x2 WORLDWIDE FASTENER STANDARDWM 921 2009 12 08 Printed copies are uncontrolled Copyright 2009, Ford Global Technologies, LLC Page 2 of 2 Table 1 (Port dimensions) 0.2 A d2d4(gauging) L4L2d3(ref) Thread (d1xP) A455 L1Ra 3.2 Ra 3.2 0.1 A d5R0.4 max. R0.2 R0.1 Z pitch diamet
8、er A A Screw threads Spotface Diameter Port Diameter Gauging Diameter Port Diameter Angle Depth Drill Depth Tap Depth Angle (d1 P) d2d3d4d5L1L2L4Z mm mm mm mm mm mm mm min. ref + 0.1 - 0.0 + 0.4 - 0.0 +0.5 -0.5 min. 0.5 M8 1 14 3 12.5 9.1 1.6 14.75 10 12 M10 1 16 4.5 14.5 11.1 1.6 14.75 10 12 M12 1.
9、5 19 6 17.5 13.8 2.4 17.85 11.5 15 M14 1.5 21 7.5 19.5 15.8 2.4 17.85 11.5 15 M16 1.5 24 9 22.5 17.8 2.4 19.35 13 15 M18 1.5 26 11 24.5 19.8 2.4 20.85 14.5 15 M20 1.5 27 25.5 21.8 2.4 20.85 14.5 15 M22 1.5 29 14 27.5 23.8 2.4 20.85 14.5 15 M27 2 34 18 32.5 29.4 3.1 27 19 15 M30 2 38 18 36.5 32.4 3.1 27 19 15 M33 2 43 23 41.5 35.4 3.1 27 19 15 M42 2 52 30 50.5 44.4 3.1 27.5 19.5 15 M48 2 57 36 55.5 50.4 3.1 30 22 15 M60 2 67 44 65.5 62.4 3.1 32.5 24.5 15
