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Steel Reinforcing Couplers

Last edit date: 1/29/2025

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 Date
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 - 4/3/2029
Headed Reinforcement Corporation
Fountain Valley, CA 92708		HRC 626 SB-21-01 #4, #5, #6 - 6/30/2025
Sleeve ThreadedBarSplice Products Incorporated
Dayton, OH 45414		Barsplicer XP System STD-20-01 #4, #5, #6, #7, #8, #9, #10, #11 - 12/31/2027
Headed Reinforcement Corporation
Fountain Valley, CA 92708		HRC 300 Series Form Protector STD-22-01 #4, #5, #6, #7, #8 - 6/30/2025
Sleeve-Filler Grout CouplerERICO International Corporation (nVent)
Solon, OH 44139		LENTON INTERLOK Rebar Splice System (taper threaded) SG-17-02 #8 #8 Expired on 5/28/2021
Splice Sleeve North America, Incorporated
Livonia, MI 48152		NMB SG-17-01 #5, #6, #7, #8, #9, #10, #11, #14 - Expired on 3/4/2025
Sleeve-Filler MetalERICO International Corporation (nVent)
Solon, OH 44139		CADWELD SM-17-01 #18 - Expired on 12/31/2021
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 7/29/2025
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 6/30/2025
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 6/30/2025
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 6/30/2025
Sleeve-Lock Shear BoltsBarSplice Products Incorporated
Dayton, OH 45414		Double Row ZAP Screwlok Type 2 Series (Standard) SL-17-04 #4, #8, #14, #18 - 4/3/2029
Zap ScrewLok SL SL-21-02 #4, #5, #6, #7, #8, #9, #10, #11, #14, #18 - 4/3/2029
ZAP Screwlok Type 2 Series (Standard) SL-17-03 #4, #5, #6, #7, #8, #9, #10, #11 - 4/3/2029
Dayton Superior
Dayton, OH 45459		Bar-Lock L Series D250L SL-17-06 #3, #4, #5, #6, #7, #8, #9, #10, #11 - 4/30/2025
Bar-Lock L Series D250L (20 bolts) * Product Discontinued SL-17-07 #14 - Expired on 8/2/2021
Bar-Lock S/CA Series - D250SCA (formerly S-series) SL-17-01 #4, #5, #6, #7, #8, #9, #10, #11, #14, #18 - 4/30/2025
ERICO International Corporation (nVent)
Solon, OH 44139		LENTON LOCK (B1 Series) Foreign Made * Product Discontinued SL-17-08 #4, #5, #6, #7, #8, #9, #10, #11 #4, #5, #6, #7, #8, #9, #10, #11 Expired on 12/31/2021
LENTON LOCK (S1 Series) Foreign Made * Product Discontinued SL-17-09 #4, #5, #6, #7, #8, #9, #10, #11, #14, #18 - Expired on 12/31/2021
nVent LENTON Connect S2 SL-21-01 #4, #5, #6, #7, #8, #9, #10, #11 - 4/26/2028
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 - 4/3/2029
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 4/3/2029
Grip Twist Position Coupler SS-17-05 #4, #5, #6, #7, #8, #9, #10, #11, #14, #18 - 4/3/2029
Taper Threaded Grip Twist Position Coupler SS-17-07 #0 #11, #14 4/3/2029
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 4/3/2029
Dextra America Incorporated
Simi Valley, CA 930651574		Griptec SS-17-06 #4, #5, #6, #7, #8, #9, #10, #11, #14, #18 - Expired on 12/31/2020
Sleeve-Tapered ThreadDayton Superior
Dayton, OH 45459		Taper Lock D-310 Standard Coupler ST-17-11 #6, #7, #8, #9, #10, #11, #14 - 7/29/2025
Taper Lock D-330 Positional Coupler ST-17-12 #6, #7, #8, #9, #10, #11, #14 - 7/29/2025
Taper Lock D-340 Flange Coupler ST-17-13 #6, #7, #8, #9, #10, #11, #14 - 7/29/2025
ERICO International Corporation (nVent)
Solon, OH 44139		LENTON FORM SAVER ST-17-05 #3, #4, #5, #6, #7, #8, #9, #10, #11 - 4/26/2028
LENTON INTERLOK Rebar Splice System (grout filler) ST-17-06 #8 #8 Expired on 12/31/2021
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 4/26/2028
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 4/26/2028
LENTON Position (P8) ST-17-03 #4, #6, #7, #8, #9, #10, #11, #14, #18 - 4/26/2028
LENTON Position (P9) ST-17-04 #4, #6, #7, #8, #9, #10, #11, #14, #18 - 4/26/2028
LENTON Standard (A2) ST-17-01 #3, #4, #5, #6, #7, #8, #9, #10, #11, #14, #18 - 4/26/2028
nVent LENTON Ultimate Positional (MT12/PT15/MS15) ST-18-02 #4, #8, #9, #10, #11, #14, #18 #4, #8, #9, #10, #11, #14, #18 4/26/2028
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 4/26/2028
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 6/30/2025
HRC 410/490 Position Coupler ST-17-10 #8, #9, #10, #11, #14, #18 #8, #9, #10, #11, #14, #18 6/30/2025
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 11/29/2024
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 11/29/2024
HT.S Standard Coupler (Friction Welded) ST-23-03 #4, #5, #6, #7, #8, #9 #4, #5, #6, #7, #8, #9 8/25/2025
HT.S Standard Coupler (Friction Welded) Foreign Made ST-17-15 #4, #5, #6, #7, #8, #9, #10, #11, #14 #4, #5, #6, #7, #8, #9, #10, #11, #14 Expired on 2/28/2023
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 6/30/2025
Xtender 500 XL/510 XL Position Coupler (formerly 507/571) TP-17-02 #11 #11 6/30/2025
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 6/30/2025
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 6/30/2025
Upset Bar Ends-Dowel Bars IncludedDayton Superior
Dayton, OH 45459		US/MC Forged UB-17-01 #6, #7, #8, #9, #10, #11 #7, #8, #9, #10, #11 Expired on 5/28/2021
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 - 4/26/2028
OCM, Incorporated
Grayslake, IL 60030		O-S Splice Clip (one clip per splice) WT-17-01 #4, #5, #6 - 4/30/2025

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 Date
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 - 4/3/2029
Sleeve-Lock Shear BoltsBarSplice Products Incorporated
Dayton, OH 45414		ZaP Screwlok Transition Coupler SLT-20-03 #11/#14, #14/#18 - 4/3/2029
ZAP Screwlok Transition Coupler SLT-17-02 #5/#7 - 4/3/2029
Dayton Superior
Dayton, OH 45459		Bar-Lock Transitional Coupler S/CA Series - D220 (formerly S series) SLT-17-01 #5/#6 - 7/29/2025
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 4/3/2029
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 - 4/26/2028
Two Piece Sleeve/Forged EndsHeaded Reinforcement Corporation
Fountain Valley, CA 92708		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 6/30/2025
Xtender XT 500/510 Transition Nut Coupler TPT-17-06 #11/#14 #11/#14 6/30/2025

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 Date
Sleeve-SwagedBarSplice Products Incorporated
Dayton, OH 45414		BPI-GRIPTM (BarGrip) SW-17-01 #5, #6, #7, #8, #14 - Expired on 11/30/2021
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 6/30/2025
Xtender 500/510 TF-17-01 #5, #6, #7, #8, #9, #10, #11 #7, #8, #9, #11 6/30/2025
Xtender 500/515 adjustable tension hoop coupler TF-17-02 #8 - 6/30/2025

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 Date
Sleeve-Threaded BarDYWIDAG-Systems International
Long Beach, CA 90805		A 615, grade 75 reinforcement bar splice SE-17-01 #11, #18, #20 - Expired on 1/31/2022
Williams Form Engineering Corporation
Golden, CO 80401		A615, grade 75 reinforcement bar splice SE-17-02 #14, #18 - Expired on 1/31/2022
Threaded BarSkyline Steel Corp
Cartersville , GA 30121-5192		A615, grade 75 reinforcement bar splice TB-17-03 #8, #9, #10, #11, #14 - Expired on 2/28/2022

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