Aerospace Series. Bolt, 100° Countersunk head, Hi-Torque speed drive recess, close tolerance shank, UNJF thread, split pin hole option, titanium alloy, various finishes. Classification: Rm 1100–1250 MPa (160 000–180 000 lbf/in2) at Ambient Temperature | +315 °C

Amendment of

BS 2A 266 TO 2A 271:2016

Available format(s)

Hardcopy , PDF

Language(s)

English

Published date

29-03-2019

Publisher

British Standards Institution

Foreword
1 Scope
2 Normative references
3 General requirements
4 BS part number
5 Indentification and marking
Bibliography

This British Standard specifies the materials, dimensions, finish and inspection requirements for titanium alloy bolts with 100° countersunk heads and UNJF threads for aerospace use.

This British Standard specifies the materials, dimensions, finish and inspection requirements for titanium alloy bolts with100° countersunk heads and UNJF threads for aerospace use.NOTE The values in Imperial British units are to be regarded as the standard. CAUTION. A269has cadmium as a plating material, which has been restricted and/or banned for use in many countries owing to environmental and health concerns; they should not be used in new product designs. Local officials should be consulted about any concerns on using cadmium‑plated parts. In addition, cadmium plating on titanium parts has been documented to result in stress corrosion and also solid metal embrittlement (SME) when exposed to relatively low temperatures. Accordingly, BS A 270 has been introduced as a replacement. When considering the use of cadmium plated titanium bolts, attention is drawn to DefStan00‑970Pt.1/12Section4Leaflet8, which recommends certain limitations on their use.

Committee	ACE/12
DevelopmentNote	Supersedes BS A266-271(1977) & 15/30329889 DC. (03/2016)
DocumentType	Standard
ISBN	9780539008968
Pages	20
ProductNote	This standard also refer to ASD-STAN prEN ,6118,ASD-STAN prEN 6117, Def Stan 00-970, SAE ITC RS678, Consolidate version now available for this standard.
PublisherName	British Standards Institution
Status	Current
Supersedes	BS A266-271(1977) : 1977 AMD 2811 15/30329889 DC : 0 BS A 266; A 267 [...]:1977

BS A 346:2000	UNJ threads. General requirements and limit dimensions
BS A242,A243,A244,A245(1974) : 1974	SPECIFICATION FOR HEXAGONAL CASTLE NUTS (OF CLASS 3B UNJ THREAD)
BS EN 3813:2013	Aerospace series. Titanium alloy TI-P64001 (Ti-6Al-4V). Annealed. Bar and wire for forged fasteners. D<sub>e</sub> ≤ 50 mm
BS A 273:1978	Specification for gauging practice for 100° countersunk head fasteners for flushness control
DEFSTAN 01-5/17(2011) : 2011	FUELS, LUBRICANTS AND ASSOCIATED PRODUCTS
BS EN 2808:1997	Anodizing of titanium and titanium alloys
ISO 8080:1985	Aerospace Anodic treatment of titanium and titanium alloys Sulfuric acid process
SAE AS 5272 : 2016	LUBRICANT, SOLID FILM, HEAT CURED, CORROSION INHIBITING, PROCUREMENT SPECIFICATION
BS A 272:1977	Specification for Hi-torque speed drive recess: dimensions and gauging for countersunk head fasteners
DTD 942 : AUG 73	ANODIZING OF TITANIUM AND TITANIUM ALLOYS
BS EN 2133:2010	Aerospace series. Cadmium plating of steels with specified tensile strength ≤ 1450 MPa, copper, copper alloys and nickel alloys
SAE AMS 03-19 : 2015	ELECTRO-DEPOSITION OF CADMIUM
BS A101(1969) : 1969	GENERAL REQUIREMENTS FOR TITANIUM BOLTS
BS 3TA28(2009) : 2009	AEROSPACE SERIES - SPECIFICATION FOR FORGING STOCK AND WIRE OF TITANIUM-ALUMINIUM-VANADIUM ALLOY (TENSILE STRENGTH 1100-1300 MPA) (LIMITING RULING SECTION 20 MM)
BS M 58:1986	Specification for anodic coating of titanium and titanium alloys by the sulphuric acid process
SAE AMS 4967 : 2014	TITANIUM ALLOY, BARS, WIRE, FORGINGS, AND RINGS 6.0AL - 4.0V ANNEALED, HEAT TREATABLE
ISO 3161:1999	Aerospace — UNJ threads — General requirements and limit dimensions

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BS 2A 266 to 2A 271:2016+A1:2019

Current

Table of Contents

Abstract

Scope

General Product Information

Standards Referencing This Book

Category

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