AIA/NAS 4004-2011 pdf download FASTENER, 6AL-4V TITANIUM ALLOY, EXTERNALLY THREADED, 1 60 KSI Ftu, 95 KSI Fsu, 450 °F
1. SCOPE AND CLASSES
1.1 This specification defines the requirements for titanium alloy externally threaded fasteners procured under part numbers listed on drawings which refer to this specification. Typically these fasteners are used for tension, shear, and tension-fatigue applications where 160 KSI Ftu and 95 KSI Fsu is desired with a service temperature capability to 450 °F.
1.2 Requirements stipulated in purchase contracts, purchase orders, part standards and/or part drawings shall take precedence over requirements stated herein. Receiving contractors may reject any lot which does not conform.
1.3 The specification includes mechanical property requirements for three classes of fasteners, Types I, II and III, and three classes of thread lengths Long Thread, Mid thread and Short Thread.
Type I – Tension head (hex, double hex, etc.) without a recess drive (i.e. NAS6803-6820)
Type II – 100° Full flush head, long or short thread (i.e. NAS1580V)
Pan head, long or short thread (i.e. NAS1578V)
Fillister head, long or short thread (i.e. NAS1121V-1128V)
Full thread (threaded to the head) (i.e. NAS1101V)
Type III -100° Reduced flush head, long or short thread (i.e. NAS1581)
1.4 Workmanship of fasteners shall be in conformance with aircraft fastener manufacturing processes.
1.5 Recommendations for improvements or corrections to this specification should be directed to an NASC representative of a using company or to the Executive Secretary of the National Aerospace Standards Committee.
1.6 Specifications listed herein, of the issue in effect on date of inquiry, are a part of this specification to the extent indicated. In the case of conflict, the requirements herein shall take precedence.
1.7 Should a using company require qualification testing for any product specifying this document, a report for the specific product and product diameter shall be generated by the product manufacturer from product of sufficient shank and thread length to yield inspection and test data for all requirements in TABLE I including tests categorized as not mandatory. Inspection and test data shall be generated in accordance with the prescribed test methods, utilizing the sampling plan specified for a twenty-five (25) piece manufacturing lot and submitted by the product manufacturer to the product user.
1.8 Unless otherwise specified, part inventory manufactured to previous revisions of the applicable drawing or specification may be procured and used until stock is depleted.
2. APPLICABLE DOCUMENTS
2.1. Industry Standards
2.1.1 American Society of Mechanical Engineers
ASME B46.1 Surface Texture (Surface Roughness, Waviness, and Lay)
2.1.2 American Society for Metals
ASM Handbook “Atlas of Micro Structures of Industrial Alloys”
2.1.3 American Society for Quality Control
ASQ Z1.4 Sampling Procedures and Tables for Inspection by Attributes
2.1.4 American Society for Testing & Material
ASTM E 340, Standard Test Method for Macroetching Metals and Alloys
ASTM E 407, Standard Test Practice for Microetching Metals & Alloys
ASTM E 1417, Standard Practice for Liquid Penetrant Inspection
ASTM E 1447, Standard Test Method for Determination of Hydrogen in Titanium

Share on Facebook

Post on X

Follow us

Save