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Screw threads

Standards in development (68)

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Standard TitleStatus
BS 2SP 68 to 2SP 71 Specification for 100° countersunk precision head aluminium and aluminium alloy rivetsApproval
BS 2SP 77 to 2SP 80+A4 Specification for snap head aluminium and aluminium alloy rivetsApproval
BS 2SP 81 and 2SP 82+A3 Specification for snap head high nickel-copper alloy rivetsApproval
BS 2SP 87 and 2SP 88+A1 Specification for 100° countersunk head high nickel-copper alloy rivetsApproval
BS 2SP 91 to 92+A4 Specification for carbon steel worm drive clamps for aircraftApproval
BS 3692 ISO metric precision hexagon bolts, screws and nuts. SpecificationApproval
BS 3A 117:1962+A1 Specification for corrosion-resisting steel pan head bolts (Unified threads) for aircraftApproval
BS 3S 98 Specification for 2.5 % nickel-chromium -molybdenum (high carbon) steelbillets, bars, forging and parts 1160-1310 MPa: limiting rulingsection.Public Comment
BS 4190. ISO metric black hexagon bolts, screws and nuts. SpecificationPublic Comment
BS A 401 Machine Screws, Pan and 100° Countersunk Head, Hexalobular Recess,Unified Threads below .250 inch, Various materials, for AircraftAccepted
BS EN 3014 Self-locking serrated shank nuts in heat resisiting steel FE-PA92HT - Classification : 1100 MPa/650 °CApproval
BS EN 3015 Shank nuts, self-locking, serrated, in heat resisting steel FE-PA2601 (A 286), silver plated - Classification : 1 100 MPa (at ambient temperature)/650 °CApproval
BS EN 3268 Aerospace series - Pipe coupling 8°30' in titanium alloy - Pressure plugsPublication
BS EN 3631 Aerospace series - Fluid fittings, flanged, 90° elbowed - Sealing by O-ring for 0,8 mm thick tubesPublication
BS EN 3635 Aerospace series - Weld lip - Geometrical configurationPublication
BS EN 3875 Aerospace Series - Metallic Materials - Filler metal for brazing - T Technical SpecificationApproval
BS EN 3879 Aerospace series - Metallic materials - Filler metal for welding - Technical SpecificationPublic Comment
BS EN 4121 Aerospace series - Shank nuts, serrated, self-locking, in heat resisting steel FE-PA2601 (A286), silver plated on thread - Classification: 1 100 MPa (at ambient temperature) / 650 °CApproval
BS EN 4184 Aerospace series - Pipe coupling 8°30' in titanium alloy - Elbows 45°, welded ends, doublePublic Comment
BS EN 4234 Aerospace series - Clamps, worm drive - Dimensions, massesApproval
BS EN 4400-4 Aerospace series - Aluminium and aluminium- and magnesium- alloys - Technical specification Part 4:Aluminium and aluminium alloy tubePublic Comment
BS EN 4550-1 Pipe coupling, 37° - Design configuration - Inch series Part 1: Male sealing ends, sphericalPublication
BS EN 4550-4 Aerospace series - Pipe coupling, 37° - Design configuration - Inch series Part 4: Female sealing endsApproval
BS EN 4551 37°, in heat resisting steel -- Swivel nuts -- Inch seriesPublication
BS EN 4560 Aerospace series - Pipe coupling, 37°, spherical, up to 21 000 kPa - Inch series - Technical specificationTechnical Review
BS EN 4677-002 Aerospace series - Welded and brazed assemblies for aerospace constructions Electron beam welding machine Part 002 : Qualification specificationsPublic Comment
BS EN 4686 Aerospace series – Pipe coupling 8°30' in titanium alloy - Equipped blind ferrulesApproval
BS EN 6094 Aerospace series - Washer, spring, countersunknull
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 assembliesnull
BS ENISO 10484 Fasteners - Widening test on nutsPublic Comment
BS ENISO 10664 bolts and screwsApproval
BS ENISO 2320 Fasteners - Prevailing torque type steel nuts - Mechanical and performance propertiesPublic Comment
BS ENISO 4759-3 Tolerances for fasteners Part 3: Plain washers for bolts, screws and nuts - Product grades A and CPublic Comment
BS ISO 10959 Aerospace - MJ threads - GaugingPublic Comment
BS ISO 12260 Aerospace - Screws, pan head, internal offset cruciform ribbed or unribbed drive, stepped shank, short or medium length MJ threads, metallic material, coated or uncoated, strength classes less than or equal to 1 100 MPa - DimensionsPublic Comment
BS ISO 12261 Aerospace - Screws, pan head, internal offset cruciform ribbed or unribbed drive, pitch diameter shank, long length MJ threads, metallic material, coated or uncoated, strength classes less than or equal to 1 100 MPa - DimensionsPublic Comment
BS ISO 12289 Aerospace - Rivets, solid, in corrosion-resisting steel - Procurement specificationPublic Comment
BS ISO 14085-1 Aerospace - Hydraulic systems - Filter elements in filters - Test methods Part 1: Qualification proceduresPublic Comment
BS ISO 14085-2 Aerospace - Hydraulic systems - Filter elements in filters - Test methods Part 2: ConditioningPublic Comment
BS ISO 14085-3 Aerospace - Hydraulic systems - Filter elements in filters - Test methods Part 3: Filtration efficiencyPublic Comment
BS ISO 14085-4 Aerospace - Hydraulic systems - Filter elements in filters - Test methods Part 4: Retention capacity and burst/collapse pressurePublic Comment
BS ISO 14085-5 Aerospace - Hydraulic systems - Filter elements in filters - Test methods Part 5: Resistance to flow fatiguePublic Comment
BS ISO 14085-6 Aerospace - Hydraulic systems - Filter elements in filters - Test methods Part 6: Cleanliness levelPublic Comment
BS ISO 16130 Aerospace series - Dynamic testing of the locking behaviour of bolted connections under transverse loading conditions (vibration test)Public Comment
BS ISO 16228 Fastners - Certificates - Test reportsAccepted
BS ISO 16682 Aerospace - Terminology for clamping devicesApproval
BS ISO 18170 Aerospace - AC Induction Electric Motor Driven, Variable Delivery, Hydraulic Pumps - General SpecificationsIdea
BS ISO 18487 Aerospace series - Titanium Tubing - 35 MPa Operating PressureAccepted
BS ISO 1891-4 Fasteners - Terminology Part 4: Controls, inspection, delivery, acceptance and qualityAccepted
BS ISO 19631 Aerospace - Tube fittings for fluid systems, 5 000 psi (35 000 kPa) - Qualification specificationPublic Comment
BS ISO 19632 Aerospace - Fitting end, 24° internal cone, external thread, flareless type Extra fine thread pitch Inch series - Design standardPublic Comment
BS ISO 23748 Title missingPublic Comment
BS ISO 3209 Aerospace - Nuts, anchor, self-locking, floating, two lug, with counterbore, with MJ threads, classifications: 1 100 MPa (at ambient temperature )/235 degrees C, 1 100 MPa (at ambient temperature )/315 degrees C and 1 100 MPa (at ambient temperature)Public Comment
BS ISO 3269 Fasteners - Acceptance inspectionIdea
BS ISO 7169 Aerospace - Separable tube fittings for fluid systems, for 24 degree cones, for pressures up to 3 000 psi or 21 000 kPa - Procurement specification, inch/metricPublication
Opens a new windowBS ISO 7257 Aircraft - Hydraulic tubing joints and fittings - Rotary flexure testPublic Comment
BS ISO 7481 Aerospace - Nuts, self-locking, with maximum operating temperature less than or equal to 425 degrees C - Test methodsPublic Comment
BS ISO 8177 Aerospace - Omega clamps (saddle clamps) for fluid systems - DimensionsPublic Comment
BS ISO 8278.2 compensated, variable delivery pumps - General requirementsPublic Comment
BS ISO 8575 Aerospace - Fluid systems - Hydraulic system tubingPublic Comment
BS ISO 9206.2 hydraulic motors - General specificationsPublic Comment
BS ISO 9538 Aerospace - Hydraulic tubing joints and fittings - Planar flexure testPublic Comment
BS ISO 9609 Aerospace - Nuts, hexagonal, plain, reduced height, normal across flats, with MJ threads, classifications: 450 MPa (at ambient temperature) /120 degrees C, 450 MPa (at ambient temperature) /235 degrees C, 600 MPa (at ambient temperature) /425 degreesPublic Comment
BS ISO 9618 Aerospace - Nuts, hexagonal, slotted (castellated), reduced height, normal across flats, with MJ threads, classifications: 450 MPa (at ambient temperature)/120 degrees C, 450 MPa (at ambient temperature)/235 degrees C, 600 MPa (at ambient temperaturePublic Comment
BS ISO 9940 Aerospace - Fire resistant hydraulic fluidsPublic Comment
BS SP 55 and 56:1953/AMD1 Specifications for double coil spring washers for aircraftnull
BSEN 2978 Aerospace series - Pipe coupling 24 degrees in titanium alloy - Elbows 90 degreesIdea
PD CEN/TR 4541 Instruction for the installation of airframe bearingsPublic Comment

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Published standards (16)

Sort by: Reference | Title | Status

Standard referenceNameStatus
BS EN 4493:2008Aerospace series. Inserts, screw thread, helical coil, self-locking, in heat resisting nickel base alloy NI-PH1801 (NIP96HT, Nimonic 90), silver platedCurrent
BS EN 3274:2010Aerospace series. Pipe coupling 8°30'. Thread end. Geometric configurationCurrent
BS EN 3274:2001Aerospace series. Pipe coupling 8°30'. Thread. Geometric configurationsWithdrawn
BS EN 4178:2009Aerospace 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 °CCurrent, Work in Hand
BS 6293-1:1994Aerospace. MJ threads - General requirementsWithdrawn
BS 6293-2:1994Aerospace. MJ threads - Limit dimensions for bolts and nutsWithdrawn
BS 6293-3:1994Aerospace. MJ threads - Limit dimensions for fittings for fluid systemsWithdrawn
BS ISO 10959:2000Aerospace. MJ threads. GaugingCurrent
BS ISO 15872:2002Aerospace. UNJ threads. GaugingCurrent
BS A 358-1:2000MJ threads - General requirementsCurrent
BS A 358-2:2000MJ threads - Limit dimensions for bolts and nutsCurrent
BS A 358-3:2000MJ threads - Limit dimensions for fittings for fluid systemsCurrent
BS 2A 231:1993Rolled threads for bolts. Lead and runout requirementsCurrent
BS 4084:1978Specification for UNJ threads, with controlled root radius, for aerospace: inch seriesWithdrawn
BS 4084:1996UNJ threads, with controlled root radius, for aerospace. Inch seriesWithdrawn
BS A 346:2000UNJ threads. General requirements and limit dimensionsCurrent

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