Double Splice-Lock for Joining Pipe an

Available in steel, aluminum alloy 3003 and stainless steel type 304. They are most effective as a joint stiffener when used within 12" of a welded post or handrail bracket.

The screw hole is threaded into the connector and the splice-lock’s prongs hold the piece together as a unit allowing for simple insertion into the pipe or tube. The set screw is a headless socket with a cup end.

Proven the best mechanical splice available for pipe and tubular railing field joints.

Splice-locks have a shear strength similar to standard pipe but are not to be used in post assemblies.

For Pipe or Tube
For Square Tubing
Assembly Instructions

Double Lock Splice-Lock™ for Pipe and Round Tubing

Pipe	Sch.	Diameter	Thick.	a	Steel	Plated Steel	Galvanized Steel	Aluminum	Stainless	Screw
		1.250"	.065"	3-3/4"	3374	PL3374	G3374	3375	3376	5/16" × 7/8"
1"	40	1.315"	.133"	3-3/4"	3350	PL3350	G3350	3351	3353	5/16" × 7/8"
		1.500"	.065"	3-3/4"	3366		G3366	3367	3369	3/8" × 1"
		1.500"	.065"	6"	3366-6		G3366-6	3367-6	3369-6	3/8" × 1"
		1.500"	.120"	3-3/4"	3366-8		G3366-8	3367-8	3369-8	3/8" × 1"
1-1/4"	40	1.660"	.140"	3-3/4"	3354	PL3354	G3354	3355	3357	3/8" × 1"
1-1/4"	40	1.660"	.140"	6"	3356	PL3356	G3356	3372	3389	3/8" × 1"
1-1/4"	80	1.660"	.191"	3-3/4"	3396		G3396	3355H		3/8" × 1"
		1.625"	.065"	3-3/4"	3366-5		G3366-5	3367-5	3369-5	3/8" × 1"
		1.625"	.120"	3-3/4"	3366-5		G3366-5	3367-5	3369-5	3/8" × 1"
1-1/2"	5	1.900"	.065"	3-3/4"					3380	3/8" × 1-3/8"
1-1/2"	40	1.900"	.145"	3-3/4"	3358	PL3358	G3358	3359	3361	3/8" × 1-3/8"
1-1/2"	40	1.900"	.145"	6"	3368	PL3368	G3368	3384	3390	3/8" × 1-3/8"
1-1/2"	80	1.900"	.200"	3-3/4"	3388		G3388	3359H		3/8" × 1-3/8"
		2.000"	.065"	3-3/4"	3378		G3378	3379	3380	3/8" × 1-3/8"
		2.000"	.065"	6"	3378-6	PL3378-6	G3378-6	3379-6	3380-6	3/8" × 1-3/8"
		2.000"	.120"	3-3/4"	3378	PL3378	G3378	3379	3380	3/8" × 1-3/8"
		2.000"	.120"	6"	3378-6	PL3378-6	G3378-6	3379-6	3380-6	3/8" × 1-3/8"
2"	40	2.375"	.154"	3-3/4"	3362	PL3362	G3362	3363	3365	3/8" × 1-3/8"
2"	40	2.375"	.154"	6"	3373	PL3373	G3373	3377	3377-2	3/8" × 1-3/8"
2"	80	2.375"	.218"	3-3/4"	3370	PL3370	G3370	3363H		3/8" × 1-3/8"
		2.500"	.120"	8"	3391-8	PL3391-8	G3391-8	3392-8	3393-8	3/8" × 2-1/4"
		3.000"	.065"	8"	3397-8	PL3397-8	G3397-8	3398-8	3399-8	3/8" × 2-3/8"
		3.000"	.120"	8"	3394-8	PL3394-8	G3394-8	3395-8	3396-8	3/8" × 2-3/8"

Double Lock Splice-Lock™ for Square Tubing

Size	Wall Thickness	a	Steel	Zinc Plated Steel	Galvanized Steel	Aluminum	Stainless	Set Screw
1.25"	.125"	3-3/4"	3381	PL3381	G3381	3382	3383	3/8" × 1"
1.50"	.125"	3-3/4"	3385	PL3385	G3385	3386	3387	3/8" × 1"
1.50"	.125"	6"	3385-6	PL3385-6	G3385-6	3386-6	3387-6	3/8" × 1"
1.50"	.188"	3-3/4"	3385-2	PL3385-2	G3385-2	3386-2	3387-2	3/8" × 1"
2.00"	.125"	3-3/4"	3385-3	PL3385-3	G3385-3	3363-3		3/8" × 1-5/8"
2.00"	.125"	6"	3373-3	PL3373-3	G3373-3	3377-3		3/8" × 1-5/8"

DOUBLE-LOCK SPLICE-LOCK ASSEMBLY
The splice-lock contacts the inside of the tube or pipe in four areas along its length to ensure alignment and maximum strength.

Drill 13/32" diameter hole for 3/8" screws or 11/32" hole for 5/16" screws. This clear hole should be centered 3/8" from the end of each pipe or tube for 3-3/4" splice-locks or 1-7/32" to center for 6" and 8" splice-locks, as shown.
Insert splice-lock into this first section.
Insert and partially tighten the set screw.
Slide other section to be joined over the splice-lock.
Insert second set screw and tighten both screws fully.
Resultant action: Splice-lock contacts inside of pipe or tube in four areas along the full length to ensure alignment and maximum strength. The two screws also cause a pinning action in both pieces for added strength.

Note: Both sections to be joined must have the same wall thickness.