Specifications

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Nylon fasteners are favoured especially in such applications, where the properties of their material, i.e. electrical insulation, corrosion resistance, lightweight, wear resistance and colour matching are of greater importance than high tensile holding strength. Since their technical properties vary from the material they are moulded from, only general suggestions and hints can be given.

To establish the range of advantages for nylon fasteners in a specific application, it is suggested that customers carry out their own tests, for which samples will be supplied on request.

More technical information is available on request, based on the experience of countless applications.

Applications - Fasteners, bushings, hole plugs, washers, spacers, hose & cable.

MECHANICAL TEST DATA FOR NYLON BOLTS AND SET SCREWS

      TENSILE TEST MAX TORQUE DOUBLE SHEAR
SIZE ULTIMATE
TORQUE
BEFORE
DEFORMATION
YIELD
LBS.
BREAK
LBS.
YIELD
LBS.
BREAK
LBS.
M2 x .4 NO TEST NO TEST 7.12 N. N/B 89 N. 116 N.
M2.5 x 45 NO TEST NO TEST 8.9 N. N/B 156 N. 169 N.
M3 x .5 .32 Nm. .2-.26 Nm. 22 N. N/B 294 N. 329 N.
M3.5 x .6 .43 Nm. .28-.34 Nm. 53 N. N/B 378 N. 405 N.
M4 x .7 .45 Nm. .36-.43 Nm. 214 N. N/B 600 N. 636 N.
M5 x .8 .93 Nm. .73-.79 Nm. 271 N. N/B 1081 N. 1134 N.
M6 x .1 1.83 Nm. 1.41-1.47 Nm. 845 N. 912 N. 1806 N. 1877 N.
M8 x 1.25 3.39 Nm. 2.45-2.82 Nm. 1.677 N. 1744 N. 2980 N. 3034 N.
M10 x 150 5.31 Nm. 4.52-4.86 Nm. 2749 N. N/B 5026 N. 5280 N.

MATERIALS PROPERTY GUIDE

  NYLON 6 & 66 POLYPROPYLENE H.D.P.E. THERMOPLASTIC
RUBBER
SILICONE
RUBBER
Specific gravity 1.14 0.905 0.947 - 0.965 0.97 - 0.98 1.10 - 1.14
Tensile strength P.S.I. 8,700-13,000 3,900 -5,000 3,100 - 4500 980 - 1100 1.230 -1.250
Elongation % 50 - 200 50- 600 10 - 150 375 - 390 300 - 800
Melting Point ºC 265 180      
Minimum ºC -40 -25 -65 -40 -60
Max. - Continuous ºC 80 110 60 150 200
Max. - intermittent ºC 170 120 90 190 300
Effect of weak acids not resistant no effect no effect excellent resistance resistant
Effect of strong acids attacked attacked attacked resistant resistant
Effect of weak Alkalis slightly resistant no effect no effect excellent resistance resistant
Effect of strong Alkalis attacked no effect no effect very resistant resistant
Effect of Organic solvents resists most unaffected below 80ºC unaffected below 80ºC attacked by some resistant
Effect of Oils & greases resistant attacked by some limited resistance attacked by some attacked by some
Effect of Sunlight discolours slightly crazes if un-protected crazes if un-protected very resistant very resistant

POLYPROPYLENE

APPLICATIONS

Polypropylene fasteners are favoured especially in such applications, where the properties of their material, i.e. electrical insulation, corrosion resistance, lightweight, no moisture absorption, will not creep or deform, and has good dimensional stability and is resistant to certain chemicals.

You will find that polypropylene is used in various applications, here are a few examples:-

Appliances, House wares, Toys, Caps and closures, Technical components, medical items, Bottles and Pipes

*THE BASIC INFORMATION GIVEN IS FOR GUIDANCE ONLY AND SHOULD NOT BE USED TO ESTABLISH SPECIFICATION LIMITS.
 

Grade 7075 7075 6101 2030 5754
Heat Treatment T6 T73 T8 T4 H24
Surface finish OAI OABIC BRUT BRUT DG
  clear anodised Potassium      
  colour anodised bichromate unfinished unfinished de-greased
Tensile strength 530 (N/mm²) 490 (N/mm²) 270 (N/mm²)    
Yield strength 460 (N/mm²) 420 (N/mm²) 240 (N/mm²)    
Elongation 7% 11% 6%    
Hardness 160 / 185 146 / 169 95 / 105    
Modulus of elasticity 72000 (N/mm²) 72000 (N/mm²) 67000 (N/mm²)    

 

ADVANTAGES OF TITANIUM
HIGHLY RESISTANT TO CORROSION
GOOD MECHANICAL RESISTANCE
LOW THERMAL EXPANSION COEFFICIENT
LIGHTER (40%) AND STRONGER THAN 316 STAINLESS STEEL

NO ADVERSE REACTIONS WITH OTHER METALS

APPLICATIONS
PETROCHEMICAL INDUSTRY - OILRIGS, CHEMICAL BATHS
AEROSPACE INDUSTRY
AUTOMOTIVE - FORMULA 1 AND WORLD SUPERBIKES
LEISURE INDUSTRY - YACHTING AND CYCLING
MEDICAL - IMPLANTS, PINS AND MICROSCREWS

GRADE 2 & 5 DIN 912 AND 933 HEADS FORGED WITH THREADS ROLLED & MACHINED

TORQUE SETTINGS FOR BOLTS IN TENSION
(for bolts in shear reduce values by (30-40%)
  Torque for non-lubricated threads   Torque for Lubricated threads  
  MINIMUN MAXIMUM MINIMUM MAXIMUM
M5 2.8 Nm 3.4 Nm 2.5 Nm 3.00 Nm
M6 9.00 Nm 11.00 Nm 12.00 Nm 14.10 Nm
M8 13.00 Nm 16.00 Nm 12.00 Nm 14.10 Nm
M10 x 1.25 22.00 Nm 28.00 Nm 20.00 Nm 25.00 Nm
M10 x 1.5 17.00 Nm 20.00 Nm 15.50 Nm 16.00 Nm

  GRADE 2 GRADE 5 (6AI-4V)
  Commercially Pure Alpha-Beta Alloy
Chemical Composition (% Max.) 0.10C 0.08C
  0.30Fe 0.25Fe
  0.03N 0.05N
  0.25O 0.20O
  0.01H 5.5-6.75AI
  Bal. Ti 3.5-4.5V
    0.01H
    Bal. Ti
Wrought Tensile Properties Rm. Temp 600ºF 800ºF 1000ºF Rm. Temp 600ºF 800ºF 1000ºF
State Annealed       Annealed      
Ultimate Strength (psi) 50000 30000 26000 19000 130000 100000 90000 70000
Yield Strength (psi) .2% offset 40000 18000 15000 11000 120000 90000 75000 60000
Elongation in 2" (%) 20 37 25 32 10 17 18 30
Reduction in Area (%) 30 70-80 70-80 70-80 25 52 53 68
Physical Properties
Density (lbs.cu.in.) 0.163       0.163      
Beta Transus (°F) approx 1675       1830      
Melting Point (°F) approx 3020       3200      
Thermal Conductivity (Btu/hr./sq.ft.F/ft)@R.T. 9.5       3.9      
Coefficient of Thermal Expansion (32° to) 212°F 600°F 1000°F 1200°F 212°F 600°F 1000°F 1200°F
(10 / °F) Linear 4.8 5.1 5.4 5.6 5 5.3 5.6 5.9
Specific Heat@R.T. (Btu/lb./F) 0.124       0.135      
Modulus of Elasticity (10 psi) 14.9       16.5      
Modulus of Rigidity (10 psi) 6.5       6.1      
Electrical resistance (Microhms cm) 56       171      

*THE BASIC INFORMATION GIVEN IS FOR GUIDANCE ONLY AND SHOULD NOT BE USED TO ESTABLISH SPECIFICATION LIMITS.

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