SAE J58-2015 pdf free download

11-02-2020 comment

SAE J58-2015 pdf free download.The title is Flanged 12-Point Screws.The size is 3.47M.Now you can get it here.
Included in this SAE Standard are the detailed general and dimensional specifications applicable to flanged 12-point screws recognized as SAE Standard and intended for general use in automotive and other ground-based vehicles and industrial equipment.
The inclusion of dimensional data in this standard is not intended to imply that all of the products described are stock production sizes. Consumers should consult manufacturers concerning availability of product.
3. GENERAL SPECIFICATIONS
See Figure 1.
3.1 Dimensions
All dimensions in this document are in inches unless otherwise stated and apply to unplated and uncoated product unless otherwise specified.
3.3 Heads
3.3.1 Head Height
The head height shall be measured, parallel to the axis of screw, from the top of the head to the bearing surface of the flange.
3.3.2 Top of Head
The top of head may be full form or indented at the option of the manufacturer. If full form, the top of head shall b chamfered or rounded with the diameter of chamfer circle or start of rounding being equal to the specified maximum width across flats within a tolerance of-15%. If the top of head is indented, the periphery may be rounded.
3.3.3 Corner Fill and Wrenching Height
Head acceptability shall be determined using the two rings as described in Table 1A. Ring B shall be placed on the screw head followed by Ring T. The wrenching height is acceptable if ring T does not contact ring B after both rings are in place on the head. The rings shall be machined and ground to avoid any break edge on the ID.
3.3.4 Bearing Surface
The outer periphery may be rounded or chamfered to the extent permitted by X, as measured on the bearing face. The plane of the bearing face shall be perpendicular to the axis of screw within the runout limit specified in Table Measurement of runout shall be made as close to the periphery of bearing face as possible while the screw is held in a collet or other gripping device at a distance equal to one screw diameter from the underside of the head.

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