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SAE MA1508 1996 Edition, May 1, 1996
Undercuts for Straight Screw Threads - Metric
Description / Abstract:
Purpose:
This SAE Aerospace Standard (MA) provides recommended dimensional data for screw thread undercuts for straight "MJ" metric screw threads in accordance with MA1370.
Application:
The thread undercut data included in this document are primarily designed to provide a clearance for threading tool runout either where the thread is in a blind hole or here the thread is close to an adjacent shoulder. These thread undercuts are not recommended for bolts, screws, or studs which are required to be necked; e.g., reduced shank contiguous to the thread, to improve their tensile, impact, and cyclic load performance.
This SAE Aerospace Standard (MA) provides recommended dimensional data for screw thread undercuts for straight "MJ" metric screw threads in accordance with MA1370.
Application:
The thread undercut data included in this document are primarily designed to provide a clearance for threading tool runout either where the thread is in a blind hole or here the thread is close to an adjacent shoulder. These thread undercuts are not recommended for bolts, screws, or studs which are required to be necked; e.g., reduced shank contiguous to the thread, to improve their tensile, impact, and cyclic load performance.
SAE MA1508 1996 Edition, May 1, 1996
Undercuts for Straight Screw Threads - Metric