Torque Specifications Plugs Caterpillar

Plugs

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Torque Specifications [SENR3130]

Torque Specifications Ground Engaging Tool (G.E.T.) Fasteners

Torque Specifications Tie Rods

ENGINE ARRANGEMENT

MISCELLANEOUS INFORMATION

3208 Marine Engine English (SAE) Fasteners

3208 Marine Engine Metric (ISO) Fasteners

3208 Marine Engine Hose Clamps

3208 Marine Engine General Information

Torque Specifications Straight Thread O-Ring Fittings

Torque Specifications O-Ring Face Seal Fittings

Torque Specifications Installation of Fittings

1.1. Straight Thread O-Ring Plugs

2.1. Drain Plugs with Straight Threads

Straight Thread O-Ring Plugs

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Illustration 1	g00911999

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Table 1
Ferrous Straight Thread O-Ring Plug Torques for Mating with Ferrous Materials
Thread Size Inch	Internal Hex Plug Torque	External Hex Plug Torque
5/16	7 ± 1 N·m (62 ± 9 lb in)	13 ± 2 N·m (115 ± 18 lb in)
3/8	13 ± 2 N·m (115 ± 18 lb in)	20 ± 3 N·m (177 ± 27 lb in)
7/16	20 ± 3 N·m (177 ± 27 lb in)	40 ± 6 N·m (30 ± 4 lb ft)
1/2	25 ± 4 N·m (221 ± 35 lb in)	45 ± 7 N·m (33 ± 5 lb ft)
9/16	45 ± 7 N·m (33 ± 5 lb ft)	60 ± 9 N·m (44 ± 7 lb ft)
3/4	80 ± 12 N·m (59 ± 9 lb ft)	100 ± 15 N·m (74 ± 11 lb ft)
7/8	110 ± 17 N·m (81 ± 13 lb ft)	130 ± 20 N·m (96 ± 15 lb ft)
1 1/16	180 ± 27 N·m (133 ± 20 lb ft)	220 ± 33 N·m (162 ± 24 lb ft)
1 3/16	220 ± 33 N·m (162 ± 24 lb ft)	260 ± 39 N·m (192 ± 29 lb ft)
1 5/16	300 ± 45 N·m (221 ± 33 lb ft)	350 ± 53 N·m (258 ± 39 lb ft)
1 5/8	350 ± 53 N·m (258 ± 39 lb ft)	400 ± 60 N·m (295 ± 44 lb ft)
1 7/8	420 ± 63 N·m (310 ± 46 lb ft)	420 ± 63 N·m (310 ± 46 lb ft)
2 1/2	500 ± 75 N·m (369 ± 55 lb ft)	500 ± 75 N·m (369 ± 55 lb ft)

Note: Use 50 percent of the torque values from Table 1 when the fitting or the port material is nonferrous.

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Table 2
Metric Ferrous Straight Thread O-Ring Plug Torques for Mating with Ferrous Materials
Thread Size Metric	Internal Hex Plug Torque	External Hex Plug Torque
M8	10 ± 2 N·m (89 ± 18 lb in)	10 ± 2 N·m (89 ± 18 lb in)
M10	17 ± 3 N·m (150 ± 27 lb in)	20 ± 3 N·m (177 ± 27 lb in)
M12	25 ± 4 N·m (221 ± 35 lb in)	35 ± 5 N·m (26 ± 4 lb ft)
M14	45 ± 7 N·m (33 ± 5 lb ft)	45 ± 7 N·m (33 ± 5 lb ft)
M16	55 ± 8 N·m (41 ± 6 lb ft)	55 ± 8 N·m (41 ± 6 lb ft)
M18	70 ± 11 N·m (52 ± 8 lb ft)	90 ± 13 N·m (66 ± 10 lb ft)
M20	80 ± 12 N·m (59 ± 9 lb ft)	110 ± 17 N·m (81 ± 13 lb ft)
M22	100 ± 15 N·m (74 ± 11 lb ft)	130 ± 20 N·m (96 ± 15 lb ft)
M27	180 ± 27 N·m (133 ± 20 lb ft)	220 ± 33 N·m (162 ± 24 lb ft)
M30	220 ± 33 N·m (162 ± 24 lb ft)	260 ± 39 N·m (192 ± 29 lb ft)
M33	300 ± 45 N·m (221 ± 33 lb ft)	350 ± 53 N·m (258 ± 39 lb ft)
M42	350 ± 53 N·m (258 ± 39 lb ft)	400 ± 60 N·m (295 ± 44 lb ft)
M48	420 ± 63 N·m (310 ± 46 lb ft)	420 ± 63 N·m (310 ± 46 lb ft)
M60	500 ± 75 N·m (369 ± 55 lb ft)	500 ± 75 N·m (369 ± 55 lb ft)

Note: Use 50 percent of the torque values from Table 2 when the fitting or the port material is nonferrous.

Drain Plugs with Straight Threads

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Illustration 2	g01848045

Note: Plug (A), plug (B) and plug (C) are used with a gasket. Conical seal plug (D) does not use a gasket.

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Table 3
Type of Plug	Thread Size Inch	Torque
A	1/2 - 13	20 ± 3 N·m (177 ± 27 lb in)
	5/8 - 11	35 ± 5 N·m (26 ± 4 lb ft)
	3/4 - 12 3/4 - 16	50 ± 8 N·m (37 ± 6 lb ft)
	7/8 - 14 1 1/8 - 12	70 ± 11 N·m (52 ± 8 lb ft)
B	1 5/16 - 12 1 1/2 - 12	90 ± 13 N·m (66 ± 10 lb ft)
B	2 - 12	130 ± 20 N·m (96 ± 15 lb ft)
C	1 1/8 - 12	70 ± 11 N·m (52 ± 8 lb ft)
C	1 5/16 - 12	90 ± 13 N·m (66 ± 10 lb ft)
D	1/2 - 20	13 ± 2 N·m (115 ± 18 lb in)
	7/8 -14	55 ± 8 N·m (41 ± 6 lb ft)
	1 3/8 -13	90 ± 13 N·m (66 ± 10 lb ft)
	1 1/2 - 12	110 ± 17 N·m (81 ± 13 lb ft)

Note: Use 50 percent of the torque values from Table 3 when the fitting or the port material is nonferrous.

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