GOST 9150-81 METRIC THREAD. PROFILE
GOST 9150-81 · Threads
This is an informational translation of a Russian national standard. The Russian original is authoritative.
GOST 9150-81 applies to metric threads and establishes the nominal profile and dimensions of its elements.
The standard fully complies with ST SEV 180-75.
| Basic norms of interchangeability. METRIC THREAD. Profile Basic norms of interchangeability. Metric screw, thread. Profile | GOST 9150-81[ST SEV 180-75]Supersedes GOST 9150-59 [in part of the profile] GOST 9000-73 [in part of the profile] |
|---|
The nominal thread profile and the dimensions of its elements shall conform to those shown in the drawing and in the table.
Notes:
-
The shape of the root of the bolt thread is not regulated and may be either rounded or flat. The rounded shape is preferred.
-
The shape of the root of the nut thread is not regulated.
Designations of profile elements:
d — major diameter of external thread (bolt); D — major diameter of internal thread (nut); d₂ — pitch diameter of bolt; D₂ — pitch diameter of nut; d₁ — minor diameter of bolt; D₁ — minor diameter of nut; P — thread pitch; H — height of the fundamental triangle; R — nominal root radius of bolt thread; H₁ — working height of the profile.
Estimate for the “GOST 9150-81” category
Send a specification or specify volumes — we will prepare a commercial proposal with timelines and payment terms within one business day.