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Screw threads

Standards in development (65)

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Standard TitleStatus
BS 3A 117:1962+A1 Specification for corrosion-resisting steel pan head bolts (Unified threads) for aircraftIdea
BS 3TA 28:2009/Amd 1 Specification for forging stock and wire of titanium-aluminium-vanadiumalloy (tensile strength 1100-1300 MPa) (limiting ruling section 20 mm)null
BS 4A 114:1999+A2 Specification for corrosion-resisting steel, mushroom-headed,slotted-drive, bolts, strength class 880 MPaPublic Comment
BS A 401 Machine Screws, Pan and 100° Countersunk Head, Hexalobular Recess,Unified Threads below .250 inch, Various materials, for AircraftPublic Comment
BS BS 2SP 101-104:1956+A3 Specifications for Turnbarrels, tension rods and swaged cable-endconnections (Unified threads),* cadmium plated, for aircraftPublic Comment
BS BS SP 22-27:1950+A3 Specification for B.A. Washers. For aircraft purposes (primarily forinstrument use)Public Comment
BS EN 15048-1 Non-preloaded structural bolting assemblies Part 1: General requirementsPublication
BS EN 15048-2 Non-preloaded structural bolting assemblies Part 2: Suitability testPublic Comment
BS EN 3014 Self-locking serrated shank nuts in heat resisiting steel FE-PA92HT - Classification : 1100 MPa/650 °CPublication
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 °CPublication
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 4073 Screws, pan head, six lobe recess, coarse tolerance normal shank, medium length thread, in alloy steel, cadmium plated - Classification: 1100 MPa (at ambient temperature) / 235 °CTechnical Review
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 °CPublication
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, massesPublication
BS EN 4400-4 Aerospace series - Aluminium and aluminium- and magnesium- alloys - Technical specification Part 4:Aluminium and aluminium alloy tubePublic Comment
BS EN 4552 Aerospace series - Pipe coupling 37°, spherical, in heat resisting steel - Straight nipples, welded end - Inch seriesPublication
BS EN 4560 Aerospace series - Pipe coupling, 37°, spherical, up to 21 000 kPa - Inch series - Technical specificationPublication
BS EN 4677-002 Aerospace series - Welded and brazed assemblies for aerospace constructions Electron beam welding machine Part 002 : Qualification specificationsPublic Comment
BS EN 4710-001 Aerospace series - Quick release fastening systems for non-structural applications Part 01: Technical specificationPublication
BS EN 4710-002 Aerospace series - Quick release fastening systems for non-structural applications Part 002: Spring clamp stud combinationPublication
BS EN 4710-003 Aerospace series - Quick release fastening systems for non-structural applications Part 003: Spring clampPublication
BS EN 4710-004 Aerospace series - Quick release fastening systems for non-structural applications Part 004: Spring clamp - One way tolerance compensationPublication
BS EN 4710-005 Aerospace series - Quick release fastening systems for non-structural applications Part 05: Spring clamp - Two ways tolerance compensationPublication
BS EN 4710-006 Aerospace series - Quick release fastening systems for non-structural applications Part 06: Stud - quick-release and lockingPublication
BS EN 4710-007 Aerospace series - Quick release fastening systems for non-structural applications Part 07: Retaining grommetPublication
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 16228 Fastners - Certificates - Test reportsPublic Comment
BS ENISO 2320 Fasteners - Prevailing torque type steel nuts - Mechanical and performance propertiesApproval
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 11218 Aerospace - Cleanliness classification for hydraulic fluidsPublic 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 16130 Aerospace series - Dynamic testing of the locking behaviour of bolted connections under transverse loading conditions (vibration test)Publication
BS ISO 16682 Aerospace - Terminology for clamping devicesPublication
BS ISO 18170 Aerospace - AC Induction Electric Motor Driven, Variable Delivery, Hydraulic Pumps - General SpecificationsAccepted
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 specificationApproval
BS ISO 19632 Aerospace - Fitting end, 24° internal cone, external thread, flareless type Extra fine thread pitch Inch series - Design standardPublication
BS ISO 23748 Title missingPublic Comment
BS ISO 3203 Aerospace - Bolts, normal bihexagonal head, normal or 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 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 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 - DimensionsPublication
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 9528 Aerospace - Standard-weight polytetrafluoroethylene (PTFE) hose assemblies, classification 204 degrees C/21 000 kPa - Procurement specificationPublic 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 9938 Aerospace - Polytetrafluoroethylene (PTFE) hose assemblies, classification 204 degrees C/28 000 kPa - Procurement specificationPublic Comment
BS ISO 9940 Aerospace - Fire resistant hydraulic fluidsPublication
BS SP 33-39:1951+A5 Specifications for turnbarrels, tension rods and swaged cable-endconnections for aircraftnull
BS SP 55 and 56:1953/AMD1 Specifications for double coil spring washers for aircraftIdea
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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