Square Head Machine Bolts

ASTM

Tensile Strength
3/8" 16UNC = 4250lbs (18.9kN)
1/2"-13UNC = 8500lbs (37.7kN)
5/8" - 11UNC = 13550lbs (60kN)
3/4" - 10UNC = 20050lbs (98kN)
7/8" - 9UNC = 27700lbs (123kN)
1" - 8UNC = 33500lbs (148.7kN)

Bolt/ nuts meet ANSI B18.2.1/B18.2.2
Hot Dip Galvanized per ASTM A153
nuts tapped after galvanizing
All Dim before galvanizing

Add Suffix "C" for charpy level 1 compliance (20J@-20C)
Add Suffix "C15" for charpy level 1.5 compliance (27J@-30C)

US Units
Metric Units

US Units

Catalog No.	Bolt Dia.	Bolt Length	Thread Length	Approx. Ship Wt. Per Each (lbs)
Catalog No.	inch	inch	inch	Approx. Ship Wt. Per Each (lbs)
Hot Dip Galvanized
MB3802	3/8	2	1	0.11
MB3803		3	1	0.13
MB3804		4	3	0.15
MB38412		4-1/2	3	0.17
MB3805		5	3	0.18
MB38512		5-1/2	3	0.19
MB3806		6	3	0.21
MB3807		7	3	0.24
MB3808		8	4	0.27
MB3810		10	4	0.32
MB12112	1/2	1-1/2	1-1/4
MB1202		2	1-1/4	0.21
MB12212		2-1/2	1-1/4	0.24
MB1203		3	1-1/4	0.27
MB1204		4	3	0.31
MB12412		4-1/2	3	0.33
MB1205		5	3	0.35
MB1206		6	3	0.40
MB1207		7	3	0.48
MB1208		8	4	0.49
MB1209		9	4	0.57
MB1210		10	4	0.60
MB1212		12	4	0.71
MB1214		14	6	0.73
MB1216		16	6	0.82
MB5802	5/8	2	1 1/2	0.36
MB58212		2 1/2	2 1/4	0.39
MB5803		3	2 3/4	0.48
MB5804		4	3	0.57
MB5805		5	3	0.60
MB5806		6	3	0.69
MB5807		7	4	0.75
MB5808		8	4	0.78
MB5809		9	4	0.88
MB5810		10	6	0.93
MB5812		12	6	1.08
MB5814		14	6	1.23
MB5816		16	6	1.40
MB5818		18	6	1.54
MB5820		20	6	1.71
MB5822		22	6	1.76
MB5824		24	6	1.96
MB5826		26	6	2.15
MB5828		28	6	2.31
MB5830		30	6	2.52
MB3402	3/4	2	1-3/4	0.65
MB3403		3	1-3/4	0.75
MB3406		6	3	1.09
MB3407		7	3	1.18
MB3408		8	4	1.26
MB3410		10	4	1.54
MB3412		12	6	1.62
MB3414		14	6	1.88
MB3416		16	6	2.25
MB3418		18	6	2.32
MB3420		20	6	2.52
MB3422		22	6	2.68
MB3424		24	6	3.04
MB3426		26	6	3.08
MB3428		28	6	3.23
MB3430		30	8	3.46
MB3432		32	8	3.69
MB78212	7/8	2 1/2	2	0.90
MB7803		3	2	0.94
MB7804		4	2	1.15
MB7805		5	2 1/2	1.30
MB7806		6	2 1/2	1.44
MB7808		8	3	1.76
MB7810		10	6	2.08
MB7812		12	6	2.40
MB7814		14	6	2.84
MB7816		16	6	3.16
MB7818		18	6	3.52
MB7820		20	6	3.90
MB7822		22	6	4.25
MB7824		24	6	4.30
MB7826		26	8	4.62
MB7828		28	8	4.94
MB7830		30	8	5.27
MB7832		32	8	5.61
MB7834		34	6
MB7836		36	6
MB01312	1	3-1/2	2-1/2	1.48
MB0104		4	3	1.58
MB0105		5	3	1.79
MB0106		6	3	2.01
MB0108		8	4	2.43
MB0110		10	4	2.85
MB0112		12	6	3.27
MB0114		14	6	3.69
MB0116		16	6	4.12
MB0118		18	6	4.54
MB0120		20	6	4.96
MB0122		22	6	5.38
MB0124		24	6	5.81
MB0126		26	6	6.24
MB0128		28	8	6.67
MB0130		30	8	7.10
MB0132		32	8	7.53
Stainless Steel
SSMB5816	5/8	16	6	1.40
SSMB5818		18	6	1.54
SSMB5820		20	6	1.71
SSMB5822		22	6	1.76
SSMB5824		24	6	1.96
SSMB5826		26	6	2.15
SSMB5828		28	6	2.31

Metric Units

Catalog No.	Bolt Dia.	Bolt Length	Thread Length	Approx. Ship Wt. Per Each (lbs)
Catalog No.	mm	mm	mm	Approx. Ship Wt. Per Each (lbs)
Hot Dip Galvanized
MB3802	9.53	50.80	44.45	0.11
MB3803		76.20	69.85	0.13
MB3804		101.60	76.20	0.15
MB38412		114.30	76.20	0.17
MB3805		127.00	76.20	0.18
MB38512		139.70	76.20	0.19
MB3806		152.40	76.20	0.21
MB3807		177.80	101.60	0.24
MB3808		203.20	101.60	0.27
MB3810		254.00	101.60	0.32
MB12112	12.70	38.10	31.75
MB1202		50.80	44.45	0.21
MB12212		63.50	57.15	0.24
MB1203		76.20	69.85	0.27
MB1204		101.60	76.20	0.31
MB12412		114.30	76.20	0.33
MB1205		127.00	76.20	0.35
MB1206		152.40	76.20	0.40
MB1207		177.80	76.20	0.48
MB1208		203.20	101.60	0.49
MB1209		228.60	101.60	0.57
MB1210		254.00	152.40	0.60
MB1212		304.80	152.40	0.71
MB1214		355.60	152.40	0.73
MB1216		406.40	152.40	0.82
MB5802	15.88	50.80	38.10	0.36
MB58212		63.50	57.15	0.39
MB5803		76.20	69.85	0.48
MB5804		101.60	76.20	0.57
MB5805		127.00	76.20	0.60
MB5806		152.40	76.20	0.69
MB5807		177.80	101.60	0.75
MB5808		203.20	101.60	0.78
MB5809		228.60	101.60	0.88
MB5810		254.00	152.40	0.93
MB5812		304.80	152.40	1.08
MB5814		355.60	152.40	1.23
MB5816		406.40	152.40	1.40
MB5818		457.20	152.40	1.54
MB5820		508.00	152.40	1.71
MB5822		558.80	152.40	1.76
MB5824		609.60	152.40	1.96
MB5826		660.40	152.40	2.15
MB5828		711.20	152.40	2.31
MB5830		762.00	152.40	2.52
MB3402	19,05	50.80	44.45	0.65
MB3403		76.20	44.45	0.75
MB3406		152.40	76.20	1.09
MB3407		177.80	76.20	1.18
MB3408		203.20	101.60	1.26
MB3410		254.00	101.60	1.54
MB3412		304.80	152.40	1.62
MB3414		355.60	152.40	1.88
MB3416		406.40	152.40	2.25
MB3418		457.20	152.40	2.32
MB3420		508.00	152.40	2.52
MB3422		558.80	152.40	2.68
MB3424		609.60	152.40	3.04
MB3426		660.40	152.40	3.08
MB3428		711.20	152.40	3.23
MB3430		762.00	152.40	3.46
MB3432		762.00	152.40	3.69
MB78212	22,23	63.50	50.8	0.90
MB7803		76.20	50.8	0.94
MB7804		101.60	50.8	1.15
MB7805		127.00	63.5	1.30
MB7806		152.40	63.5	1.44
MB7808		203.20	76.2	1.76
MB7810		254.00	152.40	2.08
MB7812		304.80	152.40	2.40
MB7814		355.60	152.40	2.84
MB7816		406.40	152.40	3.16
MB7818		457.20	152.40	3.52
MB7820		508.00	152.40	3.90
MB7822		558.80	152.40	4.25
MB7824		609.60	152.40	4.30
MB7826		660.40	152.40	4.62
MB7828		711.20	152.40	4.94
MB7830		762.00	152.40	5.27
MB7832		812.80	152.40	5.61
MB7834		863.60	152.40
MB7836		914.40	152.40
MB01312	25,40	88.90	63.50	1.48
MB0104		101.60	76.20	1.58
MB0105		127.00	76.20	1.79
MB0106		152.40	76.20	2.01
MB0108		203.20	101.60	2.43
MB0110		254.00	101.60	2.85
MB0112		304.80	152.40	3.27
MB0114		355.60	152.40	3.69
MB0116		406.40	152.40	4.12
MB0118		457.20	152.40	4.54
MB0120		508.00	152.40	4.96
MB0122		558.80	152.40	5.38
MB0124		609.60	152.40	5.81
MB0126		660.40	152.40	6.24
MB0128		711.20	152.40	6.67
MB0130		762.00	152.40	7.10
MB0132		762.00	152.40	7.53
Stainless Steel
SSMB5816	15,88	406.40	152.40	1.40
SSMB5818		457.20	152.40	1.54
SSMB5820		508.00	152.40	1.71
SSMB5822		558.80	152.40	1.76
SSMB5824		609.60	152.40	1.96
SSMB5826		660.40	152.40	2.15
SSMB5828		711.20	152.40	2.31

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Square Head Machine Bolts

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