Clamping Screw Mounting Bases

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Thread Size

Length

Width

Number of Mounting Holes

Mounting Hole Diameter

Height

Mounting Hole Center-to-Center

U.S.–Mexico–Canada Agreement (USMCA) Qualifying

Yes

Export Control Classification Number (ECCN)

EAR99

REACH

Compliant

RoHS

Compliant

DFARS Specialty Metals

Screw Size

For Clamp Mounting Screw Thread Size

Mounting Screw Size

7 Products

Screw Clamps

Use mounting bases to attach screw clamps to flat surfaces. Their threaded portion is machined at a slightly downward angle so the clamp can get a strong grip on the workpiece. Length is measured from under the screw collar.

Optional extra-large steel tips offer more gripping strength. Optional nonmarring plastic tips minimize damage to workpieces.

Mounting Bases

Mounting Base

					Mounting Hole
Thread Size	Lg.	Wd.	Ht.	Material	Number of	Dia.	Ctr.-to-Ctr.		Each
1/4"-20	1 1/2"	7/16"	1 1/8"	Steel	2	7/32"	1 1/8"	90747A110	000000
3/8"-16	2"	5/8"	1 3/8"	Steel	2	1/4"	1 7/16"	90747A120	00000
1/2"-13	2 3/8"	3/4"	1 3/4"	Steel	2	3/8"	1 11/16"	90747A130	00000
5/8"-11	3"	1"	2 1/4"	Steel	2	7/16"	2 1/8"	90747A140	00000

Revolving Screw Clamps

Mount the clamp in a threaded hole or on a mounting base (sold separately).

Mounting Bases

Mounting Base

					Mounting Holes
For Clamp Mounting Screw Thread Size	Lg.	Wd.	Ht.	Material	Number of	Screw Size	Center-to-Center (A)	Center-to-Center (B)		Each
5/16"-18	1 7/16"	1"	1 1/2"	Steel	5	No. 10	3/4"	1"	3083N14	000000
1/2"-13	2 1/4"	1 1/4"	2 1/4"	Steel	5	1/4"	1 1/8"	1 3/8"	3083N15	00000
5/8"-11	2 1/4"	1 1/4"	2 1/4"	Steel	5	3/8"	1 1/4"	1 1/2"	3083N16	00000