Instruction manual
ËRemoving Fasteners
High strength threadlockers like Loctite
®
271 (or equivalent)
may be weakened by heating to at least 500
o
F (260
o
C) as
follows.
1. Apply localized heat to fastener as shown in FIGURE 5.
2. Disassemble while hot. Once disassembled, the cured ad-
hesive can be removed with Loctite
®
Gasket Remover
#790 (or equivalent).
ÏCarbon Steel Fasteners
Ï
All values in foot pounds and (Newton meters)
Nominal
bolt size
Grade
Designation and
Standard
Zinc or
Cadmium
Plated
If instructions call for :
Loctite
222 or
262
Loctite
242
Loctite
271
Loctite
272
Loctite
277
Bare
1/4 - 20 SAE Grade 1
ASTM A307
2.5
(3.39)
3.0
(4.06)
3.3
(4.47)
3.6
(4.88)
4.6
(6.23)
4.3
(5.83)
3.3
(4.47)
SAE Grade 2 4.1
(5.56)
4.9
(6.64)
5.5
(7.45)
6.0
(8.13)
7.7
(10.44)
7.1
(9.63)
5.5
(7.46)
SAE Grade 4 4.8
(6.50)
5.8
(7.86)
6.4
(8.67)
7.0
(9.49)
9.0
(12.20)
8.3
(11.25)
6.4
(8.67)
SAE Grade 5
ASTM A449
6.3
(8.54)
7.6
(10.3)
8.4
(11.38)
9.3
(12.60)
11.8
(15.99)
11.0
(14.91)
8.4
(11.39)
SAE Grade 7 7.9
(10.7)
9.4
(12.7)
10.5
(14.23)
11.5
(15.59)
14.7
(19.93)
13.6
(18.44)
10.5
(14.23)
SAE Grade 8
ASTM A354 Grade
BD
8.9
(12.0)
10.7
(14.5)
11.9
(16.13)
13.1
(17.76)
16.6
(22.50)
15.4
(20.88)
11.9
(16.13)
ASTM A354 Grade
BC
7.9
(10.7)
9.4
(12.7)
10.5
(14.23)
11.5
(15.59)
14.7
(19.93)
13.6
(18.44)
10.5
(14.23)
ÎFIGURE 5
(MSSM0101CE)
ÎRemoving High Strength Threadlocker
FASTENER TORQUE REQUIREMENTS MSSM0101CE/9906AV (3 of 19)
46