Fastener Weight Chart | Bolts, Nuts, Washers, Studs | HITECH Fastener
Fastener Weight Chart — Bolts · Nuts · Washers · Studs · Screws · Rods
Engineering Reference Guide

Fastener
Weight Chart

Metric & Imperial · All Materials · kg/100 pcs & kg/pc

Complete weight reference for hex bolts, nuts, washers, stud bolts, socket cap screws, threaded rods, and U-bolts. Weights calculated from standard density values per ISO / ASTM for carbon steel, stainless steel, and alloy steel. Use for procurement, shipping estimation, and structural calculations.

10+
Fastener Types
M3–M100
Size Coverage
kg/100pc
& kg/pc Values
CS · SS · AS
Material Types
How to Use This Chart

Understanding Fastener Weight Data

Fastener weights are given in kg per 100 pieces (kg/100 pcs) and kg per piece (kg/pc) for standard lengths and nominal diameters. Weights are theoretical values calculated from standard geometry and material density. Actual weights may vary ±3–5% due to manufacturing tolerances, thread form, and coating.

⚖️

Weight Units

  • kg/100 pcs — kilograms per 100 pieces (bulk procurement)
  • kg/pc — kilograms per single piece (structural calc)
  • g/pc — grams per piece (small fasteners M3–M8)
  • lbs/100 pcs — imperial bulk weight (1 kg = 2.2046 lbs)
🔩

Length Convention

  • Bolt weights shown for standard length = 1×D (grip) unless noted
  • Stud bolt weights given for full body length
  • Threaded rod weights per 1 metre length
  • Washer and nut weights are independent of bolt length
🧮

Density Used

  • Carbon Steel — 7.85 g/cm³
  • Stainless Steel — 7.93 g/cm³ (304/316)
  • Alloy Steel — 7.87 g/cm³
  • Duplex / Super Duplex — 7.80 g/cm³
Note: All weights are theoretical and calculated per ISO 4014 (hex bolt), ISO 4032 (nut), ISO 7089 (washer) geometry. For exact certified weights required for transport documentation (dangerous goods, shipping weight certificates), contact HITECH Fastener for actual weighed batch data.
Hex Bolts

Hex Bolt Weight Chart

Weight in kg/100 pcs for ISO 4014 partial-thread and ISO 4017 full-thread hex bolts. Material: Carbon Steel (density 7.85 g/cm³).

Size Pitch (mm) kg / 100 pcs — L = 30 mm kg / pc (CS)
Carbon SteelStainless 304/316Alloy Steel
M61.00.810.820.820.0081
M81.251.721.741.730.0172
M101.53.203.243.220.0320
M121.755.425.495.450.0542
M142.08.308.408.350.0830
M162.012.1012.2512.170.1210
M202.522.5022.7922.640.2250
M243.038.8039.2739.040.3880
Size Pitch (mm) kg / 100 pcs — L = 40 mm kg / pc (CS)
Carbon SteelStainless 304/316Alloy Steel
M61.00.950.960.960.0095
M81.252.082.112.090.0208
M101.53.964.013.990.0396
M121.756.706.786.740.0670
M142.010.3010.4310.360.1030
M162.015.1015.2815.190.1510
M202.528.5028.8428.670.2850
M243.049.2049.7949.500.4920
Size Pitch (mm) kg / 100 pcs — L = 50 mm kg / pc (CS)
Carbon SteelStainless 304/316Alloy Steel
M61.01.101.111.100.0110
M81.252.482.512.490.0248
M101.54.764.824.790.0476
M121.758.108.208.150.0810
M142.012.5012.6512.570.1250
M162.018.4018.6218.510.1840
M202.534.8035.2135.010.3480
M243.060.2060.9160.560.6020
M303.5115.0116.4115.71.150
M364.0198.0200.4199.21.980
Size Pitch (mm) kg / 100 pcs — L = 60 mm kg / pc (CS)
Carbon SteelStainless 304/316Alloy Steel
M81.252.902.942.920.0290
M101.55.605.675.640.0560
M121.759.559.679.610.0955
M142.014.8014.9814.890.1480
M162.021.8022.0621.930.2180
M202.541.2041.6941.450.4120
M243.071.5072.3671.930.7150
M303.5138.0139.6138.81.380
M364.0239.0241.8240.42.390
M424.5372.0376.4374.23.720
Size Pitch (mm) kg / 100 pcs — L = 80 mm kg / pc (CS)
Carbon SteelStainless 304/316Alloy Steel
M101.57.307.397.350.0730
M121.7512.5012.6512.570.1250
M162.028.2028.5428.370.2820
M202.554.0054.6454.320.5400
M243.094.0095.1294.560.9400
M303.5184.0186.2185.11.840
M364.0322.0325.8323.93.220
M424.5503.0508.9505.95.030
M485.0740.0748.8744.47.400
Size Pitch (mm) kg / 100 pcs — L = 100 mm kg / pc (CS)
Carbon SteelStainless 304/316Alloy Steel
M101.58.909.018.960.0890
M121.7515.3015.4815.390.1530
M162.035.0035.4235.210.3500
M202.567.0067.8067.400.6700
M243.0117.0118.4117.71.170
M303.5231.0233.7232.32.310
M364.0406.0410.8408.44.060
M424.5636.0643.5639.76.360
M485.0940.0951.1945.59.400
M565.51480.01497.51488.714.80
Size Pitch (mm) kg / 100 pcs — L = 120 mm kg / pc (CS)
Carbon SteelStainless 304/316Alloy Steel
M121.7518.2018.4118.300.1820
M162.042.0042.5042.250.4200
M202.580.5081.4580.980.8050
M243.0141.0142.7141.81.410
M303.5278.0281.3279.72.780
M364.0491.0496.8493.94.910
M424.5770.0779.1774.57.700
M485.01140.01153.51146.711.40
M565.51800.01821.31810.618.00
M646.02680.02711.72695.826.80
Size Pitch (mm) kg / 100 pcs — L = 150 mm kg / pc (CS)
Carbon SteelStainless 304/316Alloy Steel
M162.052.5053.1252.810.5250
M202.5101.0102.2101.61.010
M243.0177.0179.1178.01.770
M303.5351.0355.2353.13.510
M364.0620.0627.3623.76.200
M424.5975.0986.5980.79.750
M485.01445.01462.11453.514.45
M565.52290.02317.12303.522.90
M646.03420.03460.53440.234.20
M726.04900.04957.94928.949.00
Reference Standards: ISO 4014 / ISO 4017 / ASME B18.2.1 / DIN 931 / DIN 933. Select the tab matching your required bolt length. For non-standard lengths, use the formula: Weight = (Head Volume + Shank Volume) × Density.
Hex Nuts

Hex Nut Weight Chart

Weight in kg/100 pcs for standard hex nuts (ISO 4032), heavy hex nuts (ISO 4033), and nyloc nuts (ISO 10511).

Size Pitch Width A/F Hex Nut (ISO 4032) Heavy Hex Nut (ISO 4033) Nyloc Nut
kg/100 (CS)kg/100 (SS) kg/100 (CS)kg/100 (SS) kg/100 (CS)
M61.010mm0.210.210.260.260.25
M81.2513mm0.520.530.650.660.62
M101.517mm1.031.041.281.301.22
M121.7519mm1.731.752.152.182.05
M142.022mm2.652.683.303.343.14
M162.024mm3.853.894.804.864.56
M182.527mm5.355.416.676.756.34
M202.530mm7.307.399.109.218.64
M222.532mm9.609.7111.9812.1211.37
M243.036mm12.5012.6515.6015.7814.80
M273.041mm18.2018.4222.7022.9721.57
M303.546mm25.5025.8031.8032.1830.21
M333.550mm33.8034.2042.2042.7040.08
M364.055mm44.7045.2455.8056.4652.99
M424.565mm72.5073.3690.5091.5785.94
M485.075mm110.0111.3137.0138.6130.4
M565.585mm175.0177.1218.0220.6207.5
M646.095mm260.0263.1325.0328.8308.5
Reference Standards: ISO 4032 (Style 1) · ISO 4033 (Style 2 Heavy) · ISO 10511 (Nyloc) · DIN 934 · ASME B18.2.2. Heavy hex nut (ASTM A194 Grade 2H) weights are approximately 24–25% heavier than standard hex nuts.
Washers

Washer Weight Chart

Weight in kg/100 pcs for flat washers (ISO 7089), large series (ISO 7093), and spring lock washers (DIN 127).

Bolt Size ID (mm) Flat Washer — ISO 7089 (Normal) Flat Washer — ISO 7093 (Large) Spring Lock Washer DIN 127
OD × Thk (mm)kg/100 (CS) OD × Thk (mm)kg/100 (CS) kg/100 (CS)
M66.412 × 1.60.06518 × 1.60.1750.030
M88.416 × 1.60.15024 × 2.00.4800.060
M1010.520 × 2.00.32030 × 2.50.9800.110
M1213.024 × 2.50.57037 × 3.01.9800.180
M1415.028 × 2.50.78044 × 3.02.9000.250
M1617.030 × 3.01.15050 × 4.05.2000.360
M1819.034 × 3.01.52056 × 4.06.9000.480
M2021.037 × 3.01.90060 × 4.07.9000.600
M2223.039 × 3.02.16066 × 5.011.000.760
M2425.044 × 4.03.50072 × 5.013.500.960
M2728.050 × 4.04.70085 × 6.022.501.280
M3031.056 × 4.05.90092 × 6.026.501.620
M3637.066 × 5.09.800110 × 8.050.002.800
M4243.078 × 6.016.20125 × 8.070.004.100
M4850.092 × 6.023.00145 × 10.0115.05.800
Stud Bolts

Stud Bolt Weight Chart

Weight in kg/100 pcs for full-thread stud bolts per ASTM A193 B7 / ASME B16.5. Length shown is full body length including both threaded ends.

Size Pitch kg / 100 pcs by Length kg/m (for custom)
L = 60mmL = 80mmL = 100mmL = 150mm
M101.54.606.157.7011.550.617
M121.757.8010.4013.0019.501.040
M162.016.0021.3026.6039.902.130
M202.528.5038.0047.5071.253.800
M243.046.8062.4078.00117.06.240
M273.063.0084.00105.0157.58.400
M303.582.50110.0137.5206.311.00
M333.5107.0142.7178.3267.514.27
M364.0136.0181.3226.7340.018.13
M394.0168.0224.0280.0420.022.40
M424.5204.0272.0340.0510.027.20
M485.0282.0376.0470.0705.037.60
M565.5418.0557.3696.7104555.73
M646.0590.0786.7983.3147578.67
M726.0780.0104013001950104.0
M806.0984.0131216402460131.2
Socket Cap Screws

Socket Head Cap Screw Weight Chart

Weight in kg/100 pcs for socket head cap screws per ISO 4762 / DIN 912 / ASME B18.3. Carbon Steel Grade 12.9 density 7.85 g/cm³.

Size Pitch kg / 100 pcs by Length
L = 20mmL = 30mmL = 40mmL = 50mmL = 60mm
M40.70.0950.1310.1670.2040.240
M50.80.1750.2420.3090.3770.444
M61.00.2900.4030.5150.6280.740
M81.250.6000.8401.0801.3201.560
M101.51.1201.5752.0302.4852.940
M121.751.8902.6673.4444.2214.998
M142.02.9804.2205.4606.7007.940
M162.04.3206.1307.9409.75011.56
M202.58.20011.7015.2018.7022.20
M243.014.5020.8027.1033.4039.70
Threaded Rods

Threaded Rod Weight Chart

Weight in kg/metre and kg/3m, 1m length rod. Per DIN 975 / ISO 4028. Standard rod lengths: 1m, 2m, 3m.

Size Pitch Stress Area (mm²) kg / metre kg / 3m length rod
Carbon SteelSS 304/316Alloy Steel Carbon SteelSS 304/316Alloy Steel
M61.020.10.2220.2250.2230.6660.6750.669
M81.2536.60.3950.4000.3981.1851.2001.194
M101.558.00.6170.6240.6221.8511.8721.866
M121.7584.30.8880.8990.8952.6642.6972.685
M142.01151.2081.2221.2183.6243.6663.654
M162.01571.5801.5991.5934.7404.7974.779
M182.51921.9962.0202.0145.9886.0606.042
M202.52452.4662.4952.4887.3987.4857.464
M222.53032.9843.0193.0118.9529.0579.033
M243.03533.5503.5923.58110.6510.77610.743
M273.04594.4944.5474.53513.4813.64113.605
M303.55615.5475.6125.59816.6416.83616.794
M364.08177.9888.0828.06323.9624.24624.189
M424.5112110.96311.09211.06632.8933.27633.198
M485.0147314.42714.59714.56243.2843.79143.686
M565.5203019.67819.91019.86359.0359.73059.589
M646.0267625.91926.22526.16277.7678.67578.486
U-Bolts

U-Bolt Weight Chart

Weight in kg/pc for standard round-bend U-bolts. Weights vary by pipe size (saddle diameter) and rod diameter. Carbon Steel, density 7.85 g/cm³.

Rod Dia. Pipe / Saddle ID Leg Length kg / pc kg / 100 pcs
Carbon SteelSS 304SS 316
M1025mm (1″)80mm0.0680.0690.0696.80
M1033mm (1¼”)80mm0.0750.0760.0767.50
M1242mm (1½”)100mm0.1450.1470.14714.50
M1248mm (2″)100mm0.1620.1640.16416.20
M1660mm (2½”)120mm0.3700.3740.37437.00
M1676mm (3″)120mm0.4200.4250.42542.00
M2089mm (3½”)150mm0.7600.7690.76976.00
M20102mm (4″)150mm0.8400.8500.85084.00
M24114mm (4½”)180mm1.4201.4371.437142.0
M24141mm (5½”)180mm1.6201.6391.639162.0
M30168mm (6″)220mm3.1203.1573.157312.0
M36219mm (8″)260mm6.5006.5776.577650.0
Material Reference

Material Density Reference Table

Standard densities used for weight calculation of fasteners. Values per ISO and ASTM material specifications.

Carbon Steel
ASTM A307 / ISO Class 4.6–10.9
Density7.85 g/cm³
7850 kg/m³0.2836 lb/in³
Grades4.6, 4.8, 8.8, 10.9, 12.9
StandardsISO 898-1, ASTM A307
SS 304 / 316
Austenitic Stainless Steel
Density7.93 g/cm³
7930 kg/m³0.2865 lb/in³
GradesA2-70, A4-70, A4-80
StandardsISO 3506, ASTM F593
Alloy Steel
ASTM A193 B7 / 42CrMo4
Density7.87 g/cm³
7870 kg/m³0.2843 lb/in³
GradesB7, B7M, L7, 4140
StandardsASTM A193, ASTM A320
Duplex / SDX
Duplex 2205 / Super Duplex 2507
Density (2205)7.80 g/cm³
Density (2507)7.78 g/cm³
GradesUNS S31803, S32750
StandardsASTM A182, ISO 3506
Material Density (g/cm³) Density (kg/m³) Density (lb/in³) Common Fastener Grade Reference Standard
Carbon Steel7.8578500.28368.8 / 10.9 / A307ISO 898-1
Alloy Steel (4140)7.8778700.2843B7 / 12.9ASTM A193 B7
SS 304 / 304L7.9379300.2865A2-70 / F593ISO 3506
SS 316 / 316L7.9879800.2883A4-70 / A4-80ASTM F593
Duplex 22057.8078000.2818UNS S31803ASTM A182
Super Duplex 25077.7877800.2811UNS S32750ASTM A182 F53
Monel 4008.8388300.319UNS N04400ASTM B164
Inconel 6258.4484400.305UNS N06625ASTM B446
Titanium Grade 24.5145100.163UNS R50400ASTM F467
Brass (CuZn40)8.5085000.307CuZn35, CuZn40DIN 17660
Aluminium (6061)2.7027000.0975Al 6061-T6ASTM B211
Formula Guide

Fastener Weight Calculation Formulas

Use these formulas to calculate theoretical weight for non-standard sizes or custom lengths not listed in the tables above.

Hex Bolt Weight
W = (Vhead + Vshank) × ρ
Vhead = (3√3/8) × s² × k  |  Vshank = π/4 × d² × L
s = width across flats  |  k = head height  |  d = shank dia  |  ρ = density
Threaded Rod Weight (per metre)
W = π/4 × d² × 1000 × ρ × 10⁻⁶ kg
d = nominal diameter in mm  |  ρ = density in g/cm³
Simplified: W (kg/m) ≈ d² × 0.00617 (for carbon steel)
Hex Nut Weight
W = [(3√3/8) × s² − π/4 × d²] × m × ρ
s = width across flats  |  d = thread diameter  |  m = nut height
ρ = material density (g/cm³) · multiply by 10⁻³ for kg result
Flat Washer Weight
W = π/4 × (D² − d²) × t × ρ
D = outer diameter (mm)  |  d = inner diameter (mm)
t = thickness (mm)  |  ρ = density (g/cm³) · result × 10⁻³ = kg

⚡ Quick Estimation Rules (Carbon Steel)

Hex Bolts (approx)

  • M10 × 50mm ≈ 0.048 kg/pc
  • M16 × 60mm ≈ 0.218 kg/pc
  • M20 × 80mm ≈ 0.540 kg/pc
  • M24 × 100mm ≈ 1.170 kg/pc
  • M30 × 120mm ≈ 2.780 kg/pc

Hex Nuts (approx)

  • M10 nut ≈ 0.0103 kg/pc
  • M16 nut ≈ 0.0385 kg/pc
  • M20 nut ≈ 0.0730 kg/pc
  • M24 nut ≈ 0.1250 kg/pc
  • M30 nut ≈ 0.2550 kg/pc

Threaded Rods (per metre)

  • M10 rod ≈ 0.617 kg/m
  • M16 rod ≈ 1.580 kg/m
  • M20 rod ≈ 2.466 kg/m
  • M24 rod ≈ 3.550 kg/m
  • M30 rod ≈ 5.547 kg/m
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