Parafusos Sextavados ASTM-A307 Grau A


REFERÊNCIA
ASME B18.2.1 – 1996
(Tabela 2)

parafusos-sextavados-astm-a307-grau-a
Diâmetro NominalEFGHRLTL < ou = 6 " L > 6 "
máx.máx.min.máx.minmáx.min.máx.min.básicobásico
1/4"6.60411.12510.79512.82712.2934.7753.810.7620.25419.0525.4
5/16"8.29912.712.29314.65514.025.9694.9530.7620.25422.22528.575
3/8"9.85514.27413.81716.5115.7486.8075.740.7620.25425.431.75
7/16"11.4815.87515.31618.33817.4498.0266.9080.7620.25428.57534.925
1/2"13.08119.0518.41521.99620.989.2457.670.7620.25431.7538.1
5/8"16.30623.81223.01227.50826.23811.2779.6011.5240.50838.144.45
3/4"19.50728.57527.63532.99431.49613.30911.5571.5240.50844.4550.8
7/8"22.73333.32432.23238.50636.75315.34113.4871.5240.50850.857.15
1"25.95838.136.8343.99241.98617.7815.0112.2860.76257.1563.5
1.1/8"29.18442.87541.42749.50447.21819.81216.7132.2860.76263.569.85
1.1/4"32.43547.62546.02454.99152.47622.2519.0242.2860.76269.8576.2
1.3/8"35.66152.37450.64760.50257.73423.87620.5742.2860.76276.282.55
1.1/2"38.88757.1555.24565.98962.99226.31422.912.2860.76282.5588.9
1.3/4"45.33966.67564.46576.98773.48230.37826.7713.0481.01695.25101.6
2"51.7976.273.6687.98583.97235.25529.8453.0481.016107.95114.3
2.1/4"58.54785.72582.85498.98394.46239.31933.7054.8261.524120.65127
2.1/2"64.99895.2592.075109.982104.97843.38337.5664.8261.524133.35139.7
2.3/4"71.805104.775101.295120.98115.46847.47241.4524.8261.524146.05152.4
3"78.257114.3110.49131.978125.95852.32446.1014.8261.524158.75165.1
3.1/4"84.709123.825119.684142.976136.44857.17549.1744.8261.524171.45177.8
3.1/2"91.16133.35128.905153.974146.96460.45252.2474.8261.524184.15190.5
3.3/4"97.993142.875138.099164.973157.42965.32856.9214.8261.524196.85203.2
4"104.419152.4147.32175.971167.94470.20561.5694.8261.524209.55215.9

TOLERÂNCIA PARA COMPRIMENTOS "L"

Comprimento Nominal 1/4" a 3/8"7/16" e 1/2"9/16"a 3/4"7/8" e 1"1.1/8" a 1.1/2"Acima de 1.1/2"
Até1"0.5080.5080.508
-0.762-0.762-0.762
Acima de 1" até 2.1/2"0.5081.0161.5242.0323.0484.572
-1.016-1.524-2.032-2.54-3.048-4.572
Acima de 2.1/2"até 4"1.0161.5242.0322.544.0645.08
-1.524-2.032-2.54-3.556-4.064-5.08
Acima de 4" até 6"1.5242.0322.543.0484.5725.588
-2.54-2.54-2.54-4.064-4.572-5.588
Acima de 6"2.543.0483.5564.0645.5886.096
-4.572-4.572-4.572-5.08-5.588-6.096

OBS: ROSCAS: Quando não especificado, usar – UNC-2A, para todos os diâmetros.