Replacement Tension and Focus Lock Thumb Screw Set for GSO Crayford Focusers

Our #: PAH-GS-TSSET
Mfg #: -
Our Price: $7.50
Free shipping for this item in the US
More Info

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$25 Order Minimum Applies
Out of Stock
Availability: Expected mid-April

Product Details

Thumb screws with knurled head; Metric M4-0.7 thread with 7mm (1x) and 13mm (1x) thread length. Pack of 2 screws - one short and one long.

Excellent replacement for lost screws or upgrades for smaller ones on your astronomy accessories. Will work with commonly available eyepiece holders, adapters, diagonals, barlows, etc. that are threaded for M4 screws. Large knurled head makes it easier to grip with gloves on.

Useful Resources

Measurements - Short Screw:
A = Head Height: 0.32 in (8.1mm)
B = Head Diameter: 0.38 in (9.8mm)
C = Shoulder Height: 0.19 in (4.9mm)
D = Shoulder Diameter: 0.29 in (7.5mm)
L = Total Length: 0.83 in (21mm)
T = Thread Length: 0.27 in (7mm)
Thread Size: M4-0.7
Thread Style: Coarse
Head Style: Knurled Thumbscrew
Drive Style: None
Material: Coming soon
Color: Silver

Measurements - Long Screw:
A = Head Height: 0.32 in (8.1mm)
B = Head Diameter: 0.38 in (9.8mm)
C = Shoulder Height: 0.19 in (4.9mm)
D = Shoulder Diameter: 0.29 in (7.5mm)
L = Total Length: 1.10 in (28mm)
T = Thread Length: 0.51 in (13mm)
Thread Size: M4-0.7
Thread Style: Coarse
Head Style: Knurled Thumbscrew
Drive Style: None
Material: Varies based on available stock
Color: Silver

Other Information

  • Country of Manufacture: Taiwan