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BOSS-FLUID CONNECTION, INTERNAL STRAIGHT THREAD, SHALLOW TAP
- Aerospace Standard
- AS1171A
- Reaffirmed
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Language:
English
Rationale
AS1171A HAS BEEN REAFFIRMED TO COMPLY WITH THE SAE FIVE-YEAR REVIEW POLICY.
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1
FOR USE WITH FITTING ENDS PER AS 930 WHEN TAP DEPTHS OF MS33649 ARE CONSIDERED EXCESSIVE FOR INTENDED DESIGN.
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2
SURFACE TEXTURE: ANSI B46.1-1962. UNLESS OTHERWISE SPECIFIED, MACHINED SURFACES TO BE 125 MICROINCHES (3.2 MICROMETRES).
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3
UNLESS OTHERWISE SPECIFIED ON THE FIELD' OF THE DRAWING OR IN NOTE 4, THE DIMENSIONS SHOWN FOR THE BLIND TAP DESIGN ALSO APPLY TO THE THRU THREAD DESIGN, AND VICE VERSA. BOTH DESIGNS MAY BE MACHINED WITH EITHER A RECESSED OR RAISED SURFACE K, AS APPLICABLE.
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4
MINIMUM FLAT BOSS FACE. CLEARANCE PROVISIONS FOR FITTING, WRENCH, FITTING INSTALLATION AND TOOL FILLET RADII MUST BE ADDED AS REQUIRED. G MINIMUM DIAMETER MAY BE REDUCED BY .040 (1.01) WHEN IT DEFINES THE LIMIT OF A RAISED SURFACE AND STRENGTH REQUIREMENTS PERMIT.
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TAP DRILL DEPTH SHALL BE SUFFICIENT TO PROVIDE THREAD RUNOUT.
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B MINIMUM IS THE FULL THREAD DEPTH REQUIREMENT FOR THE BLIND TAP DESIGN AND PROVIDES MINIMIM CLEARANCE ENVELOPE FOR THE AS 930 FITTING END IN THRU THREAD DESIGN. ADDITIONAL CLEARANCE SHALL BE PROVIDED IN THRU THREAD DESIGN WHEN NEEDED TO PREVENT CHOKED FLOW.
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DIMENSIONING AND TOLERANCING: ANSI Y14.5-1973.
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THRU THREAD DESIGN SHALL HAVE SUFFICIENT THREADS TO MEET STRENGTH REQUIREMENTS OF MATERIAL USED.
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C IS THE MINIMUM DIAMETER FOR UNRESTRICTED FLUID FLOW. HOLE MAY BE ANY SIZE OR SHAPE PROVIDED CLEARANCE IS MAINTAINED TO B DEPTH FOR FITTING.
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10
REMOVE ALL BURRS AND SLIVERS AND BREAK SHARP EDGES.
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DIMENSIONS IN INCHES (MILLIMETRES). METRIC CONVERSIONS ARE INTERNATIONAL SYSTEM UNITS (SI).
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THIS IS A DESIGN STANDARD, NOT TO BE USED AS A PART NUMBER.
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Issuing Committee
G-3, Aerospace Couplings, Fittings, Hose, Tubing Assemblies
This Committee is responsible for developing and maintaining standards for design, test, and procurement of fluid systems part standards to improve reliability and economy. Their primary focus is on AS standards development and support of military standards. The Committee also develops ISO standards in a Subcommittee Advisory Group (SCAG) to ISO/TC 20/SC 10, and SAE-MA derivatives thereof.
Structure: SAE G-3 -- Parent committee SAE G-3A -- Aerospace Couplings Subcommittee SAE G-3B -- Aerospace Fittings Subcommittee SAE G-3D -- Aerospace Hose Subcommittee SAE G-3E - Aerospace Tubing Assemblies Subcommittee U.S. SCAG to ISO/TC 20/SC 10 -- ISO standards Major projects: Support of Military Standards Reform Support of military standard conversions to MIL-PERF and MIL-DTL. Development of AS replacements for military standards designated for conversion. Establish document to list G-3 accepted replacements for replaced part standards and military back-up specifications. Development of PRI QML/QPL Development of Performance Review Institute (PRI) process for approval and surveillance of manufacturers (Qualified Manufacturer List, QML) and for approval of standard parts as qualified for use (Qualified Parts List, QPL). Development of ISO Standards, Imperial Units ISO/TC 20/SC 10 standards have typically been developed in SI units. The ISO has approved development of inch-based ISO standards to support commercial aviation. Basic design, test, and procurement specifications will be selected from military standards that are to be converted to Non-Government standard (NGS) and developed as ISO standards.Reference
Number | Title |
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ANSI/B40.1 | This document is not part of the subscrption. |
ANSI/Y14.5 | This document is not part of the subscrption. |
AS930 | FITTING END - STRAIGHT THREAD, BOSS CONNECTION |
AS930D | FITTING END, STRAIGHT THREAD, BOSS CONNECTION, DESIGN STANDARD |
MIL-S-8879 | This document is not part of the subscrption. |
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