Machine Screws, Dowel Pins and
Section Contents Plain Socket Head Screws...Page 13-2 Wire Locking Screws...Page 13-3 Captive Screws...Page 13- Ventilation Screws...Page 13- Shoulder Screws...Page 13- Machine Screws - Countersunk...Page 13- - Pan Head...Page 13-9 - Cheese Head...Page 13- Cup Point Set Screws...Page 13-11 Solder Tip Set Screws...Page 13- Nylon Tip Set Screws...Page 13-13 Clamp Cleats...Page 13-1 Disc Springs...Page 13-1 Nuts...Page 13- Washers...Page 13-17 Machine Screws, Dowel Pins and Coiled Pins...Page 13-1 Dowel Pins...Page 13-19 External Circlips...Page 13- Internal Circlips...Page 13-21 Technical Information...Page T13-1 13
M1. - M Plain Socket Head Screws specification: BS33 Pt2 Tolerance class: g Material: A2-70 Austenitic (1) A-70 Austenitic (2) Stainless steel to ISO -1 Disc springs: page 13-1 Nuts: page 13- Washers: page 13-17 number selection table Example No:- S - M3 - - A7 No H J Standard Length L Matl S M1. M2 M2. M3 M M M 3... 7.0..0 1. 2.0 2..0.0.0 1. 1. 2.0 2..0.0 3 2 2 2 0 A27 (1) A7 (2) Plain socket head cap screw to ISO 72 700 MPa minimum tensile strength Rolled thread for excellent surface finish, superior thread strength and increased hardness properties Slotted head available Alternative materials available Technical support ISO metric screw threads, limits and tolerances - see page T13-1 Torque and tension guidelines - see page T13-1 Material properties - see page T13-2 13-2 sales@reliance.co.uk + (0) 1 002 www.reliance.co.uk
Wire Locking Screws M1. - M Disc springs: page 13-1 Nuts: page 13- Washers: page 13-17 specification: BS33 Pt2 Tolerance class: g Material:A2-70 Austenitic (1) A-70 Austenitic (2) Stainless steel to ISO -1 number selection table Example No:- S - M3 - - A7 - XD No H J M ±0.0 ØP ±0.0 Standard Length L Matl S M1. M2 M2. M3 M M M 3... 7.0..0 1. 2.0 2..0.0.0 1. 1. 2.0 2..0.0 1.1 1.3 1.7 2.1 2.7 3..2 0. 0. 0.7 0. 1.0 1. 1. 3 2 2 2 0 A27 (1) A7 (2) Plain socket head cap screw to ISO 72 with cross-drilled head to allow fastener retention by wire locking 700 MPa minimum tensile strength Rolled thread for excellent surface finish, superior thread strength and increased hardness properties Alternative materials available Technical support ISO metric screw threads, limits and tolerances - see page T13-1 Torque and tension guidelines - see page T13-1 Material properties - see page T13-2 sales@reliance.co.uk + (0) 1 002 www.reliance.co.uk 13-3
M2 - M Captive Screws specification: BS33 Pt2 Tolerance class: g Material: A2-70 Austenitic (1) A-70 Austenitic (2) Stainless steel to ISO -1 Disc springs: page 13-1 Nuts: page 13- Washers: page 13-17 number selection table Example No:- S - M3 - - A7 - CA No H J Ød ±0.1 E ±0.1 Standard Length L Matl S M2 M2. M3 M M M 3... 7.0..0 2.0 2..0.0.0 1. 2.0 2..0.0 1. 1. 2.2 3...0.0.0.0.0.0 2 2 0 A27 (1) A7 (2) Socket head cap screw to ISO 72 with plain shank length for captive assembly of the screw to prevent fastener loss Ideal for service covers Rolled thread for excellent surface finish, superior thread strength and increased hardness properties Slotted head available on sized M2 to M Alternative materials available Technical support ISO metric screw threads, limits and tolerances - see page T13-1 Torque and tension guidelines - see page T13-1 Material properties - see page T13-2 13- sales@reliance.co.uk + (0) 1 002 www.reliance.co.uk
Ventilation Screws M1. - M Disc springs: page 13-1 Nuts: page 13- Washers: page 13-17 specification: BS33 Pt2 Tolerance class: g Material:A2-70 Austenitic (1) A-70 Austenitic (2) Stainless steel to ISO -1 number selection table Example No:- S - M3 - - A7 - AD No H J ØA ±0.0 Standard Length L Matl S M1. M2 M2. M3 M M M 3... 7.0..0 1. 2.0 2..0.0.0 1. 1. 2.0 2..0.0 0. 0.7 0. 1.0 1.0 1. 1. 3 2 2 2 0 A27 (1) A7 (2) Socket head cap screw to ISO 72 drilled through on axis to assist cavity ventilation in vacuum assemblies Rolled thread for excellent surface finish, superior thread strength and increased hardness properties Slotted head available Alternative materials available Technical support ISO metric screw threads, limits and tolerances - see page T13-1 Torque and tension guidelines - see page T13-1 Material properties - see page T13-2 sales@reliance.co.uk + (0) 1 002 www.reliance.co.uk 13-
M3 - M Shoulder Screws Material: 3 Stainless steel Tolerance class: g Disc springs: page 13-1 Nuts: page 13- Washers: page 13-17 number selection table Example No:- MSS2 - M - 3 Ød +0.000-0.02 J H E ±0.1 Length L +0.0-0.00 Length Code M3 3.97 2 3.013.013.013.013.013 1 2 3 MSS2 M.97 2..013.013.013.013.013.013 1.013.013.013 2.013.013 7 9 11 13 1 1 M.97 3.013.013.013.013.013.013 1.013.013.013 2.013.013 17 1 19 21 22 23 2 2 2 27 13- sales@reliance.co.uk + (0) 1 002 www.reliance.co.uk
Shoulder Screws M3 - M Ød +0.000-0.02 J H E ±0.1 Length L +0.0-0.00 Length Code M 7.97 11.013.013.013.013.013.013 2 29 31 32 33 MSS2 9.97.013.013.013.013 3 3 3 37 M 9.97 1 7.013.013.013.013 3 39 0 1 M 11.97.013.013.013 2.013 2 3 Socket head screw with accurate diameter shoulder for precision assemblies May be used to replace components such as shafts, pivots, pins and guides Used for linkages and stationary guides Slotted head and Phillips head available Alternative materials available () add - to the end of the part number Alternative lengths available Technical support ISO metric screw threads, limits and tolerances - see page T13-1 Torque and tension guidelines - see page T13-1 Material properties - see page T13-2 sales@reliance.co.uk + (0) 1 002 www.reliance.co.uk 13-7
M2 - M Countersunk Machine Screws specification: BS33 Pt2 Head specification: BS13 Tolerance class: g Material: Stainless steel 0 series Disc springs: page 13-1 Nuts: page 13- Washers: page 13-17 number selection table Example No:- K - M3 - No H J Standard Length L K M2 M2. M3 M M M...3..0.0 1. 1.0 1. 2. 2.0 0 0.3 0.73 0.93 1.13 1.3 1.7 3 2 2 2 2 2 3 3 3 Alternative materials available Technical support ISO metric screw threads, limits and tolerances - see page T13-1 Torque and tension guidelines - see page T13-1 13- sales@reliance.co.uk + (0) 1 002 www.reliance.co.uk
Pan Head Machine Screws M2 - M Disc springs: page 13-1 Nuts: page 13- Washers: page 13-17 specification: BS33 Pt2 Head specification: BS13 Tolerance class: g Material: Stainless steel 0 series number selection table Example No:- P - M3 - No H J Standard Length L P M2 M2. M3 M M M.0.0.0.0.0.0 1.2 1. 1. 2. 3. 0.3 0.73 0.93 1.13 1.3 1.7 3 2 2 2 2 2 3 3 3 Alternative materials available Technical support ISO metric screw threads, limits and tolerances - see page T13-1 Torque and tension guidelines - see page T13-1 sales@reliance.co.uk + (0) 1 002 www.reliance.co.uk 13-9
M2 - M Cheese Head Machine Screws specification: BS33 Pt2 Head specification: BS13 Tolerance class: g Material: Stainless steel 0 series Disc springs: page 13-1 Nuts: page 13- Washers: page 13-17 number selection table Example No:- C - M3 - No H J Standard Length L C M2 M2. M3 M M M 3... 7.0..0 1.3 1. 2.0 2. 3.3 3.9 0.3 0.73 0.93 1.13 1.3 1.7 3 2 2 2 2 2 3 3 3 Alternative materials available Technical support ISO metric screw threads, limits and tolerances - see page T13-1 Torque and tension guidelines - see page T13-1 13- sales@reliance.co.uk + (0) 1 002 www.reliance.co.uk
Cup Point Set Screws M2 - M Gears: page -1 Reli-a-Flex couplings: page - specification: BS33 Pt2 Tolerance class: g Material: Stainless steel Manufactured to: BS EN ISO 029 number selection table Example No:- SS - M - J Standard Lengths L SS M2 M2. M3 M M M 0.9 1.3 1. 2 2. 3 2 3 3 3 2 Used for quick, permanent location of gears, collars and pulleys on shafts Suitable for high torque transmission Alternative materials available Technical support ISO metric screw threads, limits and tolerances - see page T13-1 Torque and tension guidelines - see page T13-1 sales@reliance.co.uk + (0) 1 002 www.reliance.co.uk 13-11
M2 - M Solder Tip Set Screws specification: BS33 Pt2 Tolerance class: g Material: Stainless steel 0 series with silver solder tip Gears: page -1 Couplings: page -1 number selection table Example No:- SGSS - M - 17 J Standard Lengths L Length Code M2 0.9 3 1 2 3 M3 1. 3 7 SGSS M 2 1 9 11 M 2. 1 13 1 1 M 3 2 17 1 19 Stainless steel set screw with semi-soft silver solder tip Prevents shaft marking Technical support ISO metric screw threads, limits and tolerances - see page T13-1 Torque and tension guidelines - see page T13-1 13- sales@reliance.co.uk + (0) 1 002 www.reliance.co.uk
Nylon Tip Set Screws M2 - M Gears: page -1 Couplings: page -1 specification: BS33 Pt2 Tolerance class: g Material: Stainless steel screw Nylon insert number selection table Example No:- NMSS - M - ØC A J Standard Lengths L Length Code M2 0. 0. 0.9 3.... 1 2 3 M3 1. 0. 1. 3.... 7 NMSS M 2. 1.2 2.2 7.2 11.2 1.2 9 11 M 2. 1.2 2. 7.2 11.2 1.2 21.2 13 1 1 M 3.2 1. 3 7. 11. 17. 2. 17 1 19 Stainless steel set screw with nylon tip insert Used to prevent shaft marking Self locking Full face contact Technical support ISO metric screw threads, limits and tolerances - see page T13-1 Torque and tension guidelines - see page T13-1 sales@reliance.co.uk + (0) 1 002 www.reliance.co.uk 13-13
M3 Clamp Cleats General tolerances ±0.13 mm Material: Stainless steel clamp Nylon locking insert Gearboxes: page 3-1 number selection table Mount Type Height C ±0.0 Flat B Lip E ±0.0 Height F Length G +0.0/-0. SQM- A & C 0.79 1.02 1.0 SQM-7 1.7 1.02 2.9 7.0 SQM- 1.7 1.27 2. SQM-9 1.7 1.0 3.1 SQM- A 1.9 1.0 3. SQM-11 2.3 1.02 3.3 3.1 SQM- 2.3 1.27 3.3 9. SQM-13 2.3 1.0 3.9 SQM-1 3.1 1.27. SQM-1 B 3.9 1.02.9 SQM-.72 1.0 7.32 11.0 SQM-17 A.3 1.0 7.92 1.0 O/D ØA +0.00/-0.13 M3 x 0. 9.90 Ideal for use with resolvers, encoders and potentiometers Self locking Quick releasing 13-1 sales@reliance.co.uk + (0) 1 002 www.reliance.co.uk
Disc Springs To suit M - M Screws Shafts: page 11-2 Bearings: page -2 Socket head cap screws: page 13-2 Machine screws: page 13- Nuts: page 13- General tolerances ±0.13 mm Material: Stainless steel XCrNi 17 7 Manufactured to: DIN93 number selection table Example No:- BW - M Screw ØB t Free Height Hf Ref. Height Hr Compressed Height Hc (7% Defl.) Force to Compress to Hc (N) BW M M M M7 M M M11 M.0.0. 1.0.0.0 22. 2.0.2.2.2 7.2.2.2 11.2.2 0.0 0.0 0.70 0.0 0.90 1. 1.2 1 1.0 1 0.0 0.7 0.9 1. 1.2 1. 1. 1.90 0. 0.2 0.2 0. 0.3 0. 0.0 0.0 0. 0. 0.7 0.7 0.99 1.21 1.3 1.0 193 0 03 73 93 103 111 19 1 Material: stainless steel X7CrNiAl 17 7 For use where controlled axial force is required Good for bearing pre-load configurations sales@reliance.co.uk + (0) 1 002 www.reliance.co.uk 13-1
M1. - M Nuts General tolerances ±0.13 mm Material: Stainless steel : BS392, DIN 93 Disc springs: page 13-1 Plain socket head cap screws: page 13-2 Pan head machine screws: page 13-9 Cheese head machine screws: page 13- Washers: page 13-17 number selection table Example No:- HN - M3 S T F C HN M1. M2 M2. M3 M M M 1.3 1. 2.0 2. 3.2.0.0 3.2.0.0. 7.0.0.0 3.....1 9.2 11. Product options 13- sales@reliance.co.uk + (0) 1 002 www.reliance.co.uk
Washers To Suit M1. - M Screws Screws from: page 13-2 Nuts: page 13- Disc springs: page 13-1 General tolerances ±0.13 mm Material: Stainless steel Plain Washers Tooth Lock Washers number selection tables Example No:- PW - M3 Example No:- ETW - M3 PW M1. M2 M2. M3 M M M.0.0. 7.0 9.0.0. ØB min 1.7 2.2 2.7 3.2.3.3. T 0.3 0. 0. 0. 0.9 1.1 1. ETW M2 M3 M M M..0.0.0 11.0 ØB 2.2 3.2.3.3. T 0.9 1.2 1. 1. 2.1 Product options sales@reliance.co.uk + (0) 1 002 www.reliance.co.uk 13-17
Ø0. - Ømm Coiled Pins General tolerances ±0.13 mm Material: Chrome stainless steel AISI Finish: Pickled and oiled Pin hub gears: page -13 Shaft collars: page 11-3 number selection table Example No:- MSP - 1. - - MCP Actual Dia Nom Dia Cham Dia ØB Cham Length C Ideal Hole Dia Standard Lengths L MSP 0./0.91 1.0/1.1 1.2/1.73 2.13/2.2 2./2.7 3.1/3. 0. 1.0 1. 2.0 2. 0.7 0.9 1.0 1.90 2.0 2.90 0. 0. 0.0 0.70 0.70 0.90 0.0/0. 1.00/1.0 1.0/1.0 1.99/2. 2.9/2.0 2.99/3. 1 1 1 1 1 1 1 Coiled steel pin for location and alignment Suitable for locating Reliance s gears on ground shaft Alternative materials available 13-1 sales@reliance.co.uk + (0) 1 002 www.reliance.co.uk
Dowel Pins Ø1 - Ømm Pin hub gears: page -13 Shaft collars: page 11-3 General tolerances ±0.13 mm Material: Stainless steel 0 series number selection table Example No:- D 0 - ±0.002 Diameter Code Standard Lengths L ±0.2 D 1.00 1.0 2.00 2.0 0.00.00.00 0 01 0 02 0 00 00 00 3 3 3 3 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 22 22 22 22 22 22 2 2 2 2 Precision stainless steel dowel pin, suitable for accurate location and alignment Alternative materials available sales@reliance.co.uk + (0) 1 002 www.reliance.co.uk 13-19
To suit 3 - mm Shafts External Circlips General tolerances ±0.13 mm Material: Stainless steel Shafts: page 11-2 Bearings: page -2 number selection table Example No:- D100-000 - SS D100 Nominal Shaft Dia (ØS) Dia Code 3 00 000 000 000 000 00 00 Thickness T 0.0 0.3 0.0 0.3 0.0 0. 0.70 0. 0.0 0.7 1.00 0.9 1.00 0.9 Circlip Groove Matl Clearance Width Dia Dia (ØC) W ØG 7.00.0. 11.70 1.70 17.00 19.00 0. 0.0 0. 0.0 0. 0.70 0.9 0.0 1.0 0.90 1.2 1. 1.2 1. 2.0 2.7 3.7.0.7.70. 7.0 7. 9.0 9. 11.0 11.39 SS Used to axially secure components, such as bearings on shafts Alternative materials available 13- sales@reliance.co.uk + (0) 1 002 www.reliance.co.uk
Internal Circlips To suit - mm Bores Shafts: page 11-2 Bearings: page -2 General tolerances ±0.13 mm Material: Stainless steel number selection table Example No:- D10-00 - SS D10 Nominal Bore Dia (ØB) Dia Code 00 1 010 00 19 0190 00 22 02 2 020 2 0 00 Circlip Groove Matl Thickness T Clearance Dia (ØC) Width W Dia ØG 1.00 1.2.1.70 0.9 1..0 1.00 1.2 1.1. 0.9 1. 1.70 1.00 1.2.91 9. 0.9 1..0 1.00 1.2.13 11.0 0.9 1..00 1.00 1.2 21.13.0 0.9 1. 21.00 SS 1.00 1.2 23.13 1.0 0.9 1. 20 1. 1. 2.1.0 1.1 1. 2. 1. 1. 29.1 19.0 1.1 1. 29.0 1. 1. 31. 21.0 1.1 1. 31.0 Used to axially secure components, such as bearings in housings Alternative materials available sales@reliance.co.uk + (0) 1 002 www.reliance.co.uk 13-21