United StatesChange

S4 Imperial UNC Parallel Bolt Coupler, Plain



  • Provides continuity between reinforcing bar and imperial UNC all-thread rod or bolts
  • May be used to anchor load-bearing equipment to foundations, columns or walls
  • Machined from non-weldable grades of material, but can be tack welded


Part Number EL12S4
Material Steel
Finish Plain
100% U.S. Domestic Content Yes
Rebar Size, Metric 12 mm
Rebar Size, US #4
Rebar Size, Canada 10M
Hex Width (W) 1.06"
Length (L) 2.09"
A 1 1/4"
Bar Depth (BD) 0.58"
Thread Size (TS) 5/8 UNC
Thread Depth (TD) 3/4"
Unit Weight 0.5 lb
Designed to Meet AASHTO
ABNT NBR 8548:1984
ACI 318 Type 1 (125% Specified Yield)
ACI 318 Type 2 (Specified Ultimate)
ACI 349
ACI 359
CAN/CSA - N287.2/.3/.4
IBC Type 1 (125% Specified Yield)
IBC Type 2 (Specified Ultimate)
US Army Corps of Engineers
Standard Packaging Quantity 96 pc
UPC 78285665133
Bolt-to-Coupler Capacity
Part Number Grade 2 Grade 5 Grade 8
EL10S4 8,514 lbs 17,028 lbs 21,285 lbs
EL12S4 13,560 lbs 27,120 lbs 33,900 lbs
EL16S4 20,068 lbs 40,135 lbs 48,663 lbs
EL20S4 27,704 lbs 55,408 lbs 69,260 lbs
EL22S4 36,345 lbs 72,689 lbs 90,862 lbs
EL25S4 45,797 lbs 91,593 lbs 114,491 lbs
EL28S4 58,147 lbs 116,293 lbs 143,220 lbs
EL32S4 84,315 lbs 168,630 lbs 206,473 lbs
EL36S4 113,968 lbs 227,935 lbs 232,146 lbs
EL36S4A 58,147 lbs 116,293 lbs 145,367 lbs
EL36S4B 84,315 lbs 168,630 lbs 206,473 lbs
EL43TS4 149,894 lbs 299,787 lbs 371,623 lbs
EL57TS4 239,930 lbs 479,859 lbs 599,824 lbs
Bar dimensions and weights listed may vary by region. Coupler sizes not shown may be available by special order. Contact your nVent LENTON representative for more information.
Coupler supplied without bolt.
Bolt may be replaced by threaded rod of same class/grade.
All calculations based on a minimum bolt engagement equal to Thread Depth (TD).
System Capacity based on bolt to coupler connection. For rebar to coupler connection, refer to applicable building codes and approvals or contact your nVent LENTON representative.

nVent, nVent CADDY, nVent ERICO, nVent ERIFLEX, and nVent LENTON are owned by nVent or its global affiliates. All other trademarks are the property of their respective owners. nVent reserves the right to change specifications without prior notice.




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