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Steel Reinforcing Couplers

Last edit date: 3/25/2026

Mechanical Couplers on ASTM A 706 (Grade 60) Reinforcing Steel - For Straight Bars
Type of Splice Manufacturer / Supplier Coupler Model Caltrans Coupler
Unique ID		 Authorized Service Splice
(Bar Sizes) 		Authorized Ultimate Butt Splice
(Bar Sizes) 		Expiration DateBABA Act Information*
Side-by-Side (Mechanical Lap Splice)BarSplice Products Incorporated
Dayton, OH 45414		Double Barrel ZAP Screwlok Standard Coupler SB-17-02 #4, #5, #6, #7, #8 - 4/3/2029Unconfirmed
Headed Reinforcement Corporation
Fountain Valley, CA 92708		HRC 626 SB-21-01 #4, #5, #6 - 6/30/2026Unconfirmed
Sleeve ThreadedBarSplice Products Incorporated
Dayton, OH 45414		Barsplicer XP System STD-20-01 #4, #5, #6, #7, #8, #9, #10, #11 - 12/31/2027Unconfirmed
Headed Reinforcement Corporation
Fountain Valley, CA 92708		HRC 300 Series Form Protector STD-22-01 #4, #5, #6, #7, #8 - 6/30/2026Unconfirmed
Sleeve-Filler Grout CouplerSplice Sleeve North America, Incorporated
Livonia, MI 48152		NMB SG-17-01 #4, #5, #6, #7, #8, #9, #10, #11, #14 - 9/30/2026Unconfirmed
Sleeve-ForgedDayton Superior
Dayton, OH 45459		DB/DI SF-17-01 #5, #6, #7, #8, #9, #10, #11 #5, #6, #7, #8, #9, #10, #11 2/2/2029Unconfirmed
Dextra America Incorporated
Simi Valley, CA 930651574		Bartec Position Splice (Type B) SF-17-03 #4, #5, #6, #7, #8, #9, #10, #11, #14 #4, #5, #6, #7, #8, #9, #10, #11, #14 Expired on 6/30/2025Unconfirmed
Bartec Position Splice (Type C) SF-17-04 #4, #5, #6, #7, #8, #9, #10, #11, #14 #4, #5, #6, #7, #8, #9, #10, #11, #14 Expired on 6/30/2025Unconfirmed
Bartec Standard Splice (Type A) SF-17-02 #4, #5, #6, #7, #8, #9, #10, #11, #14 #4, #5, #6, #7, #8, #9, #10, #11, #14 Expired on 6/30/2025Unconfirmed
Sleeve-Lock Shear BoltsBarSplice Products Incorporated
Dayton, OH 45414		Double Row ZAP Screwlok Type 2 Series (Standard) SL-17-04 #4, #8, #14, #18 - 4/3/2029Unconfirmed
Zap ScrewLok SL SL-21-02 #4, #5, #6, #7, #8, #9, #10, #11, #14, #18 - 4/3/2029Unconfirmed
ZAP Screwlok Type 2 Series (Standard) SL-17-03 #4, #5, #6, #7, #8, #9, #10, #11 - 4/3/2029Unconfirmed
Dayton Superior
Dayton, OH 45459		Bar-Lock L Series D250L SL-17-06 #3, #4, #5, #6, #7, #8, #9, #10, #11 - 6/30/2026Unconfirmed
Bar-Lock S/CA Series - D250SCA (formerly S-series) SL-17-01 #4, #5, #6, #7, #8, #9, #10, #11, #14, #18 - 6/30/2026Unconfirmed
ERICO International Corporation (nVent)
Solon, OH 44139		nVent LENTON Connect S2 SL-21-01 #4, #5, #6, #7, #8, #9, #10, #11 - 4/26/2028Unconfirmed
Sleeve-Swaged (Deformation Dependent)BarSplice Products Incorporated
Dayton, OH 45414		BPI-GRIP (BarGrip) SS-17-01 #3, #4, #5, #6, #7, #8, #9, #10, #11, #14, #18 - 4/3/2029Unconfirmed
BPI-GRIP (BarGrip) XL SS-17-02 #4, #5, #6, #7, #8, #9, #10, #11, #14, #18 #4, #5, #6, #7, #8, #9, #10, #11, #14, #18 4/3/2029Unconfirmed
Grip Twist Position Coupler SS-17-05 #4, #5, #6, #7, #8, #9, #10, #11, #14, #18 - 4/3/2029Unconfirmed
Taper Threaded Grip Twist Position Coupler SS-17-07 #0 #11, #14 4/3/2029Unconfirmed
Taper Threaded Grip-Twist SS-17-03 #3, #4, #5, #6, #7, #8, #9, #10, #11, #14, #18 #3, #4, #5, #6, #7, #8, #9, #10, #11, #14, #18 4/3/2029Unconfirmed
Sleeve-Tapered ThreadDayton Superior
Dayton, OH 45459		Taper Lock D-310 Standard Coupler ST-17-11 #4, #6, #7, #8, #9, #10, #11, #14 - 2/2/2029Unconfirmed
Taper Lock D-330 Positional Coupler ST-17-12 #4, #6, #7, #8, #9, #10, #11, #14 - 2/2/2029Unconfirmed
Taper Lock D-340 Flange Coupler ST-17-13 #4, #6, #7, #8, #9, #10, #11, #14 - 2/2/2029Unconfirmed
ERICO International Corporation (nVent)
Solon, OH 44139		LENTON FORM SAVER ST-17-05 #3, #4, #5, #6, #7, #8, #9, #10, #11 - 4/26/2028Unconfirmed
LENTON PLUS Position Coupler (P14L) with cold worked taper threaded rebar ST-17-07 #4, #8, #9, #10, #11, #14 #4, #8, #9, #10, #11, #14 4/26/2028Unconfirmed
LENTON PLUS Standard Coupler (A12) with cold worked taper threaded rebar ST-17-08 #4, #5, #6, #7, #8, #9, #10, #11, #14 #4, #5, #6, #7, #8, #9, #10, #11, #14 4/26/2028Unconfirmed
LENTON Position (P8) ST-17-03 #4, #6, #7, #8, #9, #10, #11, #14, #18 - 4/26/2028Unconfirmed
LENTON Position (P9) ST-17-04 #4, #6, #7, #8, #9, #10, #11, #14, #18 - 4/26/2028Unconfirmed
LENTON Standard (A2) ST-17-01 #3, #4, #5, #6, #7, #8, #9, #10, #11, #14, #18 - 4/26/2028Unconfirmed
nVent LENTON Ultimate Positional (MT12/PT15/MS15) ST-18-02 #4, #8, #9, #10, #11, #14, #18 #4, #8, #9, #10, #11, #14, #18 4/26/2028Unconfirmed
nVent LENTON Ultimate Standard (MT12/FT12) ST-18-01 #4, #5, #6, #7, #8, #9, #10, #11, #14, #18 #4, #5, #6, #7, #8, #9, #10, #11, #14, #18 4/26/2028Unconfirmed
Headed Reinforcement Corporation
Fountain Valley, CA 92708		HRC 410/420 Standard Coupler ST-17-09 #8, #9, #10, #11, #14, #18 #8, #9, #10, #11, #14, #18 6/30/2026Unconfirmed
HRC 410/490 Position Coupler ST-17-10 #8, #9, #10, #11, #14, #18 #8, #9, #10, #11, #14, #18 6/30/2026Unconfirmed
HY-TEN Reinforcement
Perris, CA 92570		HT.LT Positional Coupler (4-Part Friction Welded) Foreign Made ST-17-16 #6, #7, #8, #9, #10, #11, #14 #6, #7, #8, #9, #10, #11, #14 Expired on 11/29/2024Unconfirmed
HT.P Positional Coupler (3-Part Friction Welded) Foreign Made ST-17-14 #5, #6, #7, #8, #9, #10, #11, #14 #5, #6, #7, #8, #9, #10, #11, #14 Expired on 11/29/2024Unconfirmed
HT.S Standard Coupler (Friction Welded) ST-23-03 #4, #5, #6, #7, #8, #9, #10, #11, #14 #4, #5, #6, #7, #8, #9, #10, #11, #14 9/7/2026Unconfirmed
Two Piece Sleeve/Forged EndsHeaded Reinforcement Corporation
Fountain Valley, CA 92708		Xtender 500 XL/510 XL Coupler (formerly 507/571) TP-17-01 #7 #7 6/30/2026Unconfirmed
Xtender 500 XL/510 XL Position Coupler (formerly 507/571) TP-17-02 #11 #11 6/30/2026Unconfirmed
Xtender 500/510 Standard Coupler TP-17-03 #4, #5, #6, #7, #8, #9, #10, #11, #14 #4, #5, #6, #7, #8, #9, #10, #11, #14 6/30/2026Unconfirmed
Xtender 500/520 Form Protector TP-17-06 #4, #5, #6, #7, #8, #9, #10, #11, #14 #4, #5, #6, #7, #8, #9, #10, #11, #14 6/30/2026Unconfirmed
Wedge-Thru Sleeve (Mechanical Lap Splice)ERICO International Corporation (nVent)
Solon, OH 44139		LENTON QUICK WEDGE Mechanical Lap Coupling Device (Two clips per splice) WT-17-02 #4, #5, #6 - 4/26/2028Unconfirmed
OCM, Incorporated
Grayslake, IL 60030		O-S Splice Clip (one clip per splice) WT-17-01 #4, #5, #6 - 7/31/2026Unconfirmed

Mechanical Couplers on ASTM A 706 (Grade 60) Reinforcing Steel - For Straight Bars Transition
Type of Splice Manufacturer / Supplier Coupler Model Caltrans Coupler
Unique ID		 Authorized Service Splice
(Bar Sizes) 		Authorized Ultimate Butt Splice
(Bar Sizes) 		Expiration DateBABA Act Information*
Side-by-Side (Mechanical Lap Splice)BarSplice Products Incorporated
Dayton, OH 45414		Double Barrel ZAP Screwlok Transition Coupler SBT-17-01 #3/#4, #4/#5, #5/#6, #6/#7, #7/#8 - 4/3/2029Unconfirmed
Sleeve-Lock Shear BoltsBarSplice Products Incorporated
Dayton, OH 45414		ZAP Screwlok Transition Coupler SLT-17-02 #5/#7 - 4/3/2029Unconfirmed
ZaP Screwlok Transition Coupler SLT-20-03 #11/#14, #14/#18 - 4/3/2029Unconfirmed
Dayton Superior
Dayton, OH 45459		Bar-Lock Transitional Coupler S/CA Series - D220 (formerly S series) SLT-17-01 #5/#6 - 2/2/2029Unconfirmed
Sleeve-Swaged (Deformation Dependent)BarSplice Products Incorporated
Dayton, OH 45414		Taper Threaded Transition Grip Twist SST-17-01 #10/#18, #11/#14, #11/#18 #10/#18, #11/#14, #11/#18 4/3/2029Unconfirmed
Sleeve-Tapered ThreadERICO International Corporation (nVent)
Solon, OH 44139		LENTON Transition (A2) STT-17-01 #4/#5, #5/#6, #6/#7, #7/#8, #8/#9, #9/#10, #10/#11, #11/#14, #14/#18 - 4/26/2028Unconfirmed
Two Piece Sleeve/Forged EndsHeaded Reinforcement Corporation
Fountain Valley, CA 92708		Xtender XT 500/510 Transition Nut Coupler TPT-17-06 #11/#14 #11/#14 6/30/2026Unconfirmed
Xtender XT 500/510 Transition Nut Coupler TPT-17-04 #5/#6, #5/#7, #6/#7, #7/#8, #8/#9, #9/#10, #10/#11 #5/#6, #5/#7, #6/#7, #7/#8, #8/#9, #9/#10, #10/#11 6/30/2026Unconfirmed

Mechanical Couplers on ASTM A 706 (Grade 60) Reinforcing Steel - For Hoops
Type of Splice Manufacturer / Supplier Coupler Model Caltrans Coupler
Unique ID		 Authorized Service Splice
(Bar Sizes) 		Authorized Ultimate Butt Splice
(Bar Sizes) 		Expiration DateBABA Act Information*
Sleeve-SwagedBarSplice Products Incorporated
Dayton, OH 45414		BPI-GRIPTM (BarGrip) SW-17-01 #5, #6, #7, #8, #14 - Expired on 11/30/2021Unconfirmed
Two Piece Sleeve/Forged EndsHeaded Reinforcement Corporation
Fountain Valley, CA 92708		Xtender 500 XL/510 XL Position Coupler (formerly 507/571) TF-17-03 #8 #7, #8 6/30/2026Unconfirmed
Xtender 500/510 TF-17-01 #5, #6, #7, #8, #9, #10, #11 #7, #8, #9, #11 6/30/2026Unconfirmed
Xtender 500/515 adjustable tension hoop coupler TF-17-02 #8 - 6/30/2026Unconfirmed

Mechanical Couplers on ASTM A 615 (Grade 75) - For Threaded Bar
Type of Splice Manufacturer / Supplier Coupler Model Caltrans Coupler
Unique ID		 Authorized Service Splice
(Bar Sizes) 		Authorized Ultimate Butt Splice
(Bar Sizes) 		Expiration DateBABA Act Information*
Sleeve-Threaded BarDYWIDAG-Systems International
Long Beach, CA 90805		A 615, grade 75 reinforcement bar splice SE-17-01 #11, #18, #20 - Expired on 1/31/2022Unconfirmed
Williams Form Engineering Corporation
Golden, CO 80401		A615, grade 75 reinforcement bar splice SE-17-02 #14, #18 - Expired on 1/31/2022Unconfirmed
Threaded BarSkyline Steel Corp
Cartersville , GA 30121-5192		A615, grade 75 reinforcement bar splice TB-17-03 #8, #9, #10, #11, #14 - Expired on 2/28/2022Unconfirmed

NOTES:

  1. If there is a discrepancy between this list and the authorization letter issued by the California Department of Transportation ("Caltrans") to the splice company, the authorization letter and any conditions therein control
  2. The splice company shall inform Caltrans if any of the following occur: the design of the coupler changes, the material used in the coupler changes, changes to the manufacturing process including location changes of manufacturing plants. Caltrans may revoke the authorization of a mechanical coupler and remove it from this list for any of these reasons or if the splice company engages in fraud or misrepresentation in order to comply with the quality control and quality assurance requirements in section 52 of the Standard Specifications
  3. Caltrans takes no position respecting the validity of any intellectual property rights asserted in connection with any coupler on this list. Users of this list are solely responsible for determining the validity of any such intellectual property rights
  4. All mechanical couplers are on plain black bar unless otherwise stated. Couplers on epoxy-coated bars require corrosion protection covering
  5. Service and ultimate butt splices are defined in section 52 of the Standard Specifications
  6. This table was prepared to provide a reference source for rebar splicing systems currently authorized for use by Caltrans. Caltrans assumes no liability or responsibility for the accuracy or validity of this information if used by other entities

Caltrans contact: Structural Materials Testing Lab, smtl@dot.ca.gov

*As attested to by the supplier as of April 14, 2026 per definition in 2 CFR 184 and 23 CFR 635.410. Stakeholders should use this information in conjunction with corresponding Caltrans special provision section 6-1.04 to understand applicable requirement for the project.

The California Department of Transportation (Caltrans) is implementing statutory changes required by the Bipartisan Infrastructure Law -Build America, Buy America Act (BABA), as outlined in 2 CFR 184 and 23 CFR 635.410.

https://www.fhwa.dot.gov/construction/cqit/buyam.cfm