Steel Reinforcing Couplers

Last edit date: 2/26/2024

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 - 3/30/2024
Headed Reinforcement Corporation
Fountain Valley, CA 92708
HRC 626 SB-21-01 #4, #5, #6 - 3/28/2024
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 - 3/29/2024
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 #4, #5, #6, #7, #8, #9, #10, #11, #14, #18 - 5/6/2024
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 8/30/2024
Dextra America Incorporated
Simi Valley, CA 930651574
Bartec Position Splice (Type B) SF-17-03 #4, #5, #6, #7, #8, #9, #10, #11, #14, #18 #4, #5, #6, #7, #8, #9, #10, #11, #14, #18 5/6/2024
Bartec Position Splice (Type C) SF-17-04 #4, #5, #6, #7, #8, #9, #10, #11, #14, #18 #4, #5, #6, #7, #8, #9, #10, #11, #14, #18 5/6/2024
Bartec Standard Splice (Type A) SF-17-02 #4, #5, #6, #7, #8, #9, #10, #11, #14, #18 #4, #5, #6, #7, #8, #9, #10, #11, #14, #18 5/6/2024
Sleeve-Lock Shear BoltsBarSplice Products Incorporated
Dayton, OH 45414
Double Row ZAP Screwlok Type 2 Series (Standard) SL-17-04 #14, #18 - 3/30/2024
Zap ScrewLok SL SL-21-02 #4, #5, #6, #7, #8, #9, #10, #11, #14, #18 - 3/30/2024
ZAP Screwlok Type 2 Series (Standard) SL-17-03 #4, #5, #6, #7, #8, #9, #10, #11 - 3/30/2024
Dayton Superior
Dayton, OH 45459
Bar-Lock L Series D250L SL-17-06 #3, #4, #5, #6, #7, #8, #9, #10, #11 - 5/6/2024
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 - 5/6/2024
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 - 3/30/2024
BPI-GRIP (BarGrip) XL SS-17-02 #5, #6, #7, #8, #9, #10, #11, #14, #18 #5, #6, #7, #8, #9, #10, #11, #14, #18 3/30/2024
Grip Twist Position Coupler SS-17-05 #5, #6, #7, #8, #9, #10, #11, #14, #18 - 3/30/2024
Taper Threaded Grip Twist Position Coupler SS-17-07 #0 #11, #14 3/30/2024
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 3/30/2024
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 - 8/30/2024
Taper Lock D-330 Positional Coupler ST-17-12 #6, #7, #8, #9, #10, #11, #14 - 8/30/2024
Taper Lock D-340 Flange Coupler ST-17-13 #6, #7, #8, #9, #10, #11, #14 - 8/30/2024
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 3/28/2024
HRC 410/490 Position Coupler ST-17-10 #8, #9, #10, #11, #14, #18 #8, #9, #10, #11, #14, #18 3/28/2024
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 8/30/2024
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 8/30/2024
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 3/28/2024
Xtender 500 XL/510 XL Position Coupler (formerly 507/571) TP-17-02 #11 #11 3/28/2024
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 3/28/2024
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 3/28/2024
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 - 5/6/2024

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 - 3/30/2024
Sleeve-Lock Shear BoltsBarSplice Products Incorporated
Dayton, OH 45414
ZaP Screwlok Transition Coupler SLT-20-03 #11/#14, #14/#18 - 3/30/2024
ZAP Screwlok Transition Coupler SLT-17-02 #5/#7 - 3/30/2024
Dayton Superior
Dayton, OH 45459
Bar-Lock Transitional Coupler S/CA Series - D220 (formerly S series) SLT-17-01 #5/#6 - 5/6/2024
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 3/30/2024
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 3/28/2024
Xtender XT 500/510 Transition Nut Coupler TPT-17-06 #11/#14 #11/#14 3/28/2024

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 3/28/2024
Xtender 500/510 TF-17-01 #5, #6, #7, #8, #9, #10, #11 #7, #8, #9, #11 3/28/2024
Xtender 500/515 adjustable tension hoop coupler TF-17-02 #8 - 3/28/2024

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