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Standard

Screw Threads, Metric Buttress - MJB Profile

2019-01-03
CURRENT
MA1696B
This standard establishes the basic triangular profile for the MJB thread form, the design profiles, standard pitches, tolerance classes, formulae for tolerances and dimensions, tolerance tables, and a system of designations. Because of the specialized application for buttress threads, no preferred diameter-pitch series have been established for this standard and each application will require use of the thread formulae for dimensions and related tolerances given herein for deriving the thread dimensional requirements.
Standard

Screw Threads, Metric Buttress - MJB Profile

2012-11-08
HISTORICAL
MA1696A
This standard establishes the basic triangular profile for the MJB thread form, the design profiles, standard pitches, tolerance classes, formulae for tolerances and dimensions, tolerance tables, and a system of designations. Because of the specialized application for buttress threads, no preferred diameter-pitch series have been established for this standard and each application will require use of the thread formulae for dimensions and related tolerances given herein for deriving the thread dimensional requirements.
Standard

Screw Threads - UNJ Profile, Inch Controlled Radius Root with Increased Minor Diameter

2003-01-15
HISTORICAL
AS8879C
This SAE Aerospace Standard (AS) specifies the characteristics of screw threads - UNJ profile inch series, including a mandatory controlled radius as specified in Table 1 at the root of the external thread. The minor diameter of both external and internal threads provides a basic thread height of .5625H to accommodate the external thread maximum root radius. The following detailed design requirements are included: a Screw threads - UNJ basic profile and design profiles. b Standard series of diameter-pitch combinations for nominal thread diameters from 0.060 to 6.000 inches. c Standard thread classes and form tolerances. d Formulae for thread dimensions and tolerances. e Method of designating UNJ threads. f Tables for selected diameter-pitch combinations for close tolerance mechanical thread applications. g Tables for screw thread - UNJ profile thread limit dimensions.
Standard

Screw Threads - UNJ Profile, Inch

2001-08-01
HISTORICAL
AS8879B
This SAE Aerospace Standard (AS) specifies the characteristics of the UNJ profile inch series of screw threads, to include a mandatory controlled radius of 0.18142P to 0.15011P at the root of the external thread and with a minor diameter of both external and internal threads increased to provide a basic thread height of 0.5625H in order to accommodate the external thread maximum root radius.
Standard

Screw Threads - UNJ Profile, Inch

1999-01-01
HISTORICAL
AS8879A
This SAE Aerospace Standard (AS) specifies the characteristics of the UNJ profile inch series of screw threads, to include a mandatory controlled radius of 0.18142P to 0.15011P at the root of the external thread and with a minor diameter of both external and internal threads increased to provide a basic thread height of 0.5625H in order to accommodate the external thread maximum root radius.
Standard

Screw Threads - MJ Profile, Metric

2018-08-23
HISTORICAL
MA1370
This standard specifies the characteristics of the MJ profile metric series of screw threads, altered from ISO 68 M Profile, to include a mandatory controlled radius of 0.18042P to 0.15011P at the root of the external thread and with the minor diameter of both external and internal threads increased to provide a basic thread height of 0.5625H in order to accommodate the external thread maximum root radius.
Standard

Screw Threads - MJ Profile, Metric

2024-04-01
CURRENT
MA1370A
This standard specifies the characteristics of the MJ profile metric series of screw threads, altered from ISO 68 M Profile, to include a mandatory controlled radius of 0.18042P to 0.15011P at the root of the external thread and with the minor diameter of both external and internal threads increased to provide a basic thread height of 0.5625H in order to accommodate the external thread maximum root radius.
Standard

SURFACE ROUGHNESS (AA)

1955-07-01
HISTORICAL
AS291A
This standard provides a method for the application of surface roughness control primarily to aircraft engine and propeller parts. ASA publication B46 may be used to supplement the information compiled herein. This standard contains a summary of the information in ASA B46 publication plus other information which has been compiled from current manufacturing practice.
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