QUICK RELEASE DEVICES:
Steel Delrin® Knob Plungers - Locking & Non-locking


Part No. PRT250 (non-locking)
Part No. PRT250 (non-locking)
Part No. PRT250 (non-locking)
Part No. PRTL250 (locking)
Part No. PRTL250 (locking)
Part No. PRTL250 (locking)

Vlier Delrin Knob Steel Retractable Plungers offer a cosmetically-appealing plunger design with improved appearance and functionality. Vlier Delrin Knob Steel Retractable Locking Plungers offer a cosmetically-appealing plunger design with improved functionality that locks in the open position.

Locking Dimensions
Non-Locking Dimensions
Lbf/Newton Conversion:
Enter known value and click on empty value to view results.
lbf = N
Part No.
End Force, Lbs.
Thread
(in.)
(in.)
(in.)
(in.)
(in.)
(in.)
(in.)
Non-locking
w/Locking Element
Init.
Final
A
B
C
D
E
F
G
H
Hex
PRT250* PRT250P*
.12
.36
1/4-20
.50
.13
.16
.50
.97
.63
1/4
PRT375 PRT375P
.25
2.0
3/8-16
.75
.18
.25
.75
1.4
.94
3/8
PRT500 PRT500P
.50
1.75
1/2-13
1.0
.25
.31
1.0
1.9
1.25
1/2

*No thread relief in 1/4-20 thread size.
To Order With Locking Element - add "P" at end of the part number.
Initial End Forces +/-50% Final End Forces +/- 25%.

Lbf/Newton Conversion:
Enter known value and click on empty value to view results.
lbf = N
Part No.
End Force, Lbs.
Thread
(in.)
(in.)
(in.)
(in.)
(in.)
(in.)
(in.)
Locking
w/Locking Element
Init.
Final
A
B
C
D
E
F
G
H
Hex
PRTL250* PRTL250P*
.12
.36
1/4-20
.50
.13
.16
.50
.97
.63
1/4
PRTL375 PRTL375P
.25
2.0
3/8-16
.75
.18
.25
.75
1.4
.94
3/8
PRTL500 PRTL500P
.50
1.75
1/2-13
1.0
.25
.31
1.0
1.9
1.25
1/2

*No thread relief in 1/4-20 thread size.
To Order With Locking Element - add "P" at end of the part number.
Initial End Forces +/-50% Final End Forces +/- 25%.

Lbf/Newton Conversion:
Enter known value and click on empty value to view results.
lbf = N
Part No.
End Force, N
Thread
(mm)
(mm)
(mm)
(mm)
(mm)
(mm)
(mm)
Non-locking
w/Locking Element
Init.
Final
A
B
C
D
E
F
G
H
Hex
MPRT6* MPRT6P*
0.5
1.5
M6 x 1.0
13
3
3
12
25
16
6
MPRT10 MPRT10P
1.0
9.0
M10 x 1.5
20
5
6
19
38
25
10
MPRT12 MPRT12P
2.5
8.0
M12 x 1.75
25
6
8
25
47
31
12

*No thread relief in M6 thread size.
To Order with Locking Element - Add "P" at end of the part number.

Lbf/Newton Conversion:
Enter known value and click on empty value to view results.
lbf = N
Part No.
End Force, N
Thread
(mm)
(mm)
(mm)
(mm)
(mm)
(mm)
(mm)
Locking
w/Locking Element
Init.
Final
A
B
C
D
E
F
G
H
Hex
MPRTL6* MPRTL6P*
0.5
1.5
M6 x 1.0
13
3
3
12
25
16
6
MPRTL10 MPRTL10P
1.0
9.0
M10 x 1.5
20
5
6
19
38
25
10
MPRTL12 MPRTL12P
2.5
8.0
M12 x 1.75
25
6
8
25
47
31
12

*No thread relief in M6 thread size.
To Order with Locking Element - Add "P" at end of the part number.

Delrin® is a registered trademark of DuPont Corp.