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Screw threads

Parent Category: Aerospace construction fasteners

Standards in development (71)
Published standards (16)
Committees (4)

Standards in development (71)

Standard Title	Status
BS 2A 110+A4 hexagons and Unified threads) for shear bolts for aircraft	Publication
BS 2A 204 etc+A3 Specifications for machine screws and nuts (unified threads) below 1/4 inch for aeronautical purposes	Approval
BS 2SP 142 and SP 143+A3 Specification for solid rivets with 100° countersunk truncated radiused head made from BS L 86 (SP 142) and BS L 37 (SP 143) materials	Publication
BS 2SP 68 to 2SP 71 Specification for 100° countersunk precision head aluminium and aluminium alloy rivets	Public Comment
BS 2SP 77 to 2SP 80+A4 Specification for snap head aluminium and aluminium alloy rivets	Public Comment
BS 2SP 81 and 2SP 82+A3 Specification for snap head high nickel-copper alloy rivets	Public Comment
BS 2SP 87 and 2SP 88+A1 Specification for 100° countersunk head high nickel-copper alloy rivets	Public Comment
BS 2SP 91 to 92+A4 Specification for carbon steel worm drive clamps for aircraft	Public Comment
BS 3692 ISO metric precision hexagon bolts, screws and nuts. Specification	null
BS 3A 117:1962+A1 Specification for corrosion-resisting steel pan head bolts (Unified threads) for aircraft	Approval
BS 5L 100:2011+A1 Procedure for inspection, testing and acceptance of wrought aluminiumand aluminium alloys	Idea
BS A 401 Machine Screws, Pan and 100° Countersunk Head, Hexalobular Recess,Unified Threads below .250 inch, Various materials, for Aircraft	null
BS BS 3A 125-3A etc +A1 (Unified threads) for aircraft	Publication
BS EN 2032-001 Aerospace series - Metallic materials Part 1 : Conventional designation	Approval
BS EN 2043 Aerospace series - Metallic materials - General requirements for semi-finished product qualification (excluding forgings and castings)	Approval
BS EN 2648 Aerospace series Washers, concave, in alloy steel, cadmium plated	Public Comment
BS EN 3268 Aerospace series - Pipe coupling 8°30' in titanium alloy - Pressure plugs	Public Comment
BS EN 3875 Aerospace Series - Metallic Materials - Filler metal for brazing - T Technical Specification	Approval
BS EN 3879 Aerospace series - Metallic materials - Filler metal for welding - Technical Specification	Public Comment
BS EN 4156 Aerospace series - Rod ends, with self-aligning double row ball bearings and threaded shank in steel - Inner ring and balls in corrosion resisting steel - Dimensions and loads Inch series	Approval
BS EN 4162 countersunk normal head, offset cruciform recess, coarse tolerance normal shank, medium length thread, in alloy steel, cadmium plated - Classification: 1100 MPa (at ambient temperature) / 235 °C	Approval
BS EN 4163 countersunk normal head, offset cruciform recess, coarse tolerance normal shank, long thread, in alloy steel, cadmium plated - Classification : 1100 MPa (at ambient temperature) / 235°C	Approval
BS EN 4184 Aerospace series - Pipe coupling 8°30' in titanium alloy - Elbows 45°, welded ends, double	Public Comment
BS EN 4400-4 Aerospace series - Aluminium and aluminium- and magnesium- alloys - Technical specification Part 4:Aluminium and aluminium alloy tube	Public Comment
BS EN 4400-7 Aerospace series - Aluminium and aluminium- and magnesium- alloy products - Technical specification Part 7: Aluminium alloy forgings	Accepted
BS EN 4538-2 Aerospace series - Bearings, spherical plain, in corrosion resisting steel with self-lubricating liner - Elevated load under low oscillations - Narrow series - Dimensions and loads - Inch series	Approval
BS EN 4677-002 Aerospace series - Welded and brazed assemblies for aerospace constructions Electron beam welding machine Part 002 : Qualification specifications	Public Comment
BS EN 4686 Aerospace series – Pipe coupling 8°30' in titanium alloy - Equipped blind ferrules	Public Comment
BS EN 6094 Aerospace series - Washer, spring, countersunk	null
BS EN STAN 8.4301 Aerospace series - Welded and brazed assemblies for aerospace constructi ons - Joints of metallic materials by electron beam welding - Quality ofwelded assemblies	null
BS ENISO 10511:2012 + C1 Prevailing torque type hexagon thin nuts (with non-metall ic insert)	null
BS ENISO 10683 Fasteners - Non-electrolytically applied zinc flake coatings	Public Comment
BS ENISO 14581 Fasteners - Hexalobular socket countersunk flat head screws	Approval
BS ENISO 14582 Fasteners - Hexalobular socket countersunk flat head screws, high head	Approval
BS ENISO 4034:2012 + C1 Hexagon regular nuts (style 1). Product grade C	null
BS ENISO 7719:2012 + C1 Prevailing torque type all-metal hexagon regular nuts. Property classes 5, 8 and 10	Accepted
BS ENISO 898-1:2013+C1 Mechanical properties of fasteners made of carbon steel and alloy steel. Part 1: Bolts, screws and studs with specified property classes - Coarse thread and fine pitch thread (ISO 898-1:2013)	null
BS ISO 10485 Cone proof load test on nuts	Public Comment
BS ISO 11217 Aerospace - Hydraulic system fluid contamination - Location of sampling points and criteria for sampling	Public Comment
BS ISO 12584 Aerospace — Hydraulic fluid components — Expression of particulate contamination levels	Approval
BS ISO 14085-1 Aerospace - Hydraulic systems - Filter elements in filters - Test methods Part 1: Qualification procedures	Accepted
BS ISO 14085-2 Aerospace - Hydraulic systems - Filter elements in filters - Test methods Part 2: Conditioning	Accepted
BS ISO 14085-3 Aerospace - Hydraulic systems - Filter elements in filters - Test methods Part 3: Filtration efficiency	Accepted
BS ISO 14085-4 Aerospace - Hydraulic systems - Filter elements in filters - Test methods Part 4: Retention capacity and burst/collapse pressure	Accepted
BS ISO 14085-5 Aerospace - Hydraulic systems - Filter elements in filters - Test methods Part 5: Resistance to flow fatigue	Accepted
BS ISO 14085-6 Aerospace - Hydraulic systems - Filter elements in filters - Test methods Part 6: Cleanliness level	Accepted
BS ISO 16130 Aerospace series - Dynamic testing of the locking behaviour of bolted connections under transverse loading conditions (vibration test)	Accepted
BS ISO 16228 Fastners - Certificates - Test reports	Accepted
BS ISO 16239 Metric series wires for measuring screw threads	Public Comment
BS ISO 16682 Aerospace - Terminology for clamping devices	Public Comment
BS ISO 18170 Aerospace - AC Induction Electric Motor Driven, Variable Delivery, Hydraulic Pumps - General Specifications	Idea
BS ISO 18487 Aerospace series - Titanium Tubing - 35 MPa Operating Pressure	Idea
BS ISO 1891-4 Fasteners - Terminology Part 4: Controls, inspection, delivery, acceptance and quality	Accepted
BS ISO 19631 Aerospace - Tube fittings for fluid systems, 5 000 psi (35 000 kPa) - Qualification specification	Public Comment
BS ISO 19632 Aerospace - Fitting end, 24° internal cone, external thread, flareless type Extra fine thread pitch Inch series - Design standard	Public Comment
BS ISO 21670 Hexagon weld nuts with flange	Public Comment
BS ISO 4017 Hexagon head screws - Product grades A and B	Public Comment
BS ISO 4759-3 Tolerances for fasteners Part 3: Plain washers for bolts, screws and nuts - Product grades A and C	Accepted
BS ISO 5859 Aerospace - Graphic symbols for schematic drawings of hydraulic and pneumatic systems and components	Public Comment
BS ISO 7257 Aircraft - Hydraulic tubing joints and fittings - Rotary flexure test	Accepted
BS ISO 8278 Aerospace - Hydraulic, pressure compensated, variable delivery pumps - General requirements	Public Comment
BS ISO 9206 Aerospace - Constant displacement hydraulic motors - General specifications	Public Comment
BS ISO 965-1 ISO general-purpose metric screw threads - Tolerances Part 1: Principles and basic data	Public Comment
BS ISO 9940 Aerospace - Fire resistant hydraulic fluids	Public Comment
BS SP 83 to 85+A3 Specification for mushroom head aluminium alloy rivets	Publication
BS W 13 + A1 Preformed corrosion resisting steel wire rope (ISO diameters andstrengths)	Approval
BSEN 2978 Aerospace series - Pipe coupling 24 degrees in titanium alloy - Elbows 90 degrees	Idea
BSISO11218.3 Aerospace - Cleanliness classification for aeronautical fluids	Public Comment
PD CEN/TR 4541 Instruction for the installation of airframe bearings	Public Comment
PD CEN/TR 4676 ED.1.0 Aerospace series - Aluminium pigmented coatings - List of commercial products	null
Specification ? Carbon steel shackles, cadmium plated, for aircraft	Approval

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Published standards (16)

Sort by: Reference | Title | Status

Standard reference	Name	Status
BS EN 4493:2008	Aerospace series. Inserts, screw thread, helical coil, self-locking, in heat resisting nickel base alloy NI-PH1801 (NIP96HT, Nimonic 90), silver plated	Current
BS EN 3274:2010	Aerospace series. Pipe coupling 8°30'. Thread end. Geometric configuration	Current
BS EN 3274:2001	Aerospace series. Pipe coupling 8°30'. Thread. Geometric configurations	Withdrawn
BS EN 4178:2009	Aerospace series. Screws, pan head, six lobe recess, coarse tolerance normal shank, medium length thread, in titanium alloy, anodized, MoS2 lubricated. 1100 MPa (at ambient temperature) / 315 °C	Current
BS 6293-1:1994	Aerospace. MJ threads - General requirements	Withdrawn
BS 6293-2:1994	Aerospace. MJ threads - Limit dimensions for bolts and nuts	Withdrawn
BS 6293-3:1994	Aerospace. MJ threads - Limit dimensions for fittings for fluid systems	Withdrawn
BS ISO 10959:2000	Aerospace. MJ threads. Gauging	Current
BS ISO 15872:2002	Aerospace. UNJ threads. Gauging	Current
BS A 358-1:2000	MJ threads - General requirements	Current
BS A 358-2:2000	MJ threads - Limit dimensions for bolts and nuts	Current
BS A 358-3:2000	MJ threads - Limit dimensions for fittings for fluid systems	Current
BS 2A 231:1993	Rolled threads for bolts. Lead and runout requirements	Current
BS 4084:1978	Specification for UNJ threads, with controlled root radius, for aerospace: inch series	Withdrawn
BS 4084:1996	UNJ threads, with controlled root radius, for aerospace. Inch series	Withdrawn
BS A 346:2000	UNJ threads. General requirements and limit dimensions	Current

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Committees (4)

Sort by: Reference | Name

Committee Reference	Title
ACE/12	Aerospace fasteners and fastening systems
ACE/69	Aerospace hydraulic systems, fluids and components
FME/9	Fasteners
ACE/61	Metallic materials for aerospace purposes

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