Section A
Terminal Type Reference
Use terminal form and model code as the first filter before checking insulation or mounting dimensions.
| Terminal Type | Code | Insulation Code Ref | Wire Size Ref | Size Ref | Tongue Width Ref |
|---|---|---|---|---|---|
| Ring Terminals | R | NYD | 1.25 | - | 3.7 |
| Spade Terminals | S | D | 2 | - | 4 |
| Locking Spade Terminals | LS | - | - | - | - |
| Flange Spade Terminals | FS | - | - | - | - |
| Hook Terminals | H | NY | 5.5 | - | 5 |
| Blade Terminals | DB | E | 0.2 | - | 6 |
| Lipped Blade Terminals | LB | - | - | - | - |
| Pin Terminals | PT | V | 1.25 | - | 10 |
| Flag Terminals | FG | - | - | - | - |
| DIN-Ring Terminals | DR | - | - | - | - |
| DIN-Spade Terminals | DS | - | - | - | - |
| Female Disconnects | FD | NYD | 5.5 | 250 | - |
| Male Disconnects | MD | - | - | - | - |
| Female Disconnects - Fully Insulated | FDF | NYD | 2 | 250 | - |
| Flag Female Disconnects | FLD | NYD | 1.25 | 250 | - |
| Piggy Back Disconnects | PBD | - | - | - | - |
| Female Receptacle Disconnects | FR | - | - | - | - |
| Male Bullet Disconnects | MP | - | - | - | - |
| Closed End Connectors | CE | - | 1.25 | - | - |
| Butt Connectors | B | V | 2 | - | - |
| Cord End Terminals | E | - | 75 | 12 | - |
| Double Line Cord End Terminals | TE | - | 10 | 08 | - |
Section B
Insulation & Color/Wire Reference
Confirm insulation category first, then match wire-size intervals from stable color ranges.
| Crimp Type | Code | Insulation Material | Temperature Rating |
|---|---|---|---|
| Nylon Insulated - Single Crimp | NY | Nylon | 105 C |
| Vinyl Insulated - Double Crimp | D | Vinyl | 75 C |
| Vinyl Insulated - Single Crimp | V | Vinyl | 75 C |
| Non-Insulated with Brazed Seam | NB | None | - |
Typical Insulation Structures
Visual comparison of common insulation structures used across terminal families.
NY TYPE
Nylon Insulated - Single Crimp
Higher temperature resistance and improved durability for general applications.
D TYPE
Vinyl Insulated - Double Crimp
Enhanced insulation and mechanical support for secure crimping.
V TYPE
Vinyl Insulated - Single Crimp
Standard insulation for general-purpose electrical connections.
NB TYPE
Non-Insulated - Brazed Seam
For direct metal contact and high-strength mechanical performance.
N TYPE
Non-Insulated - Butted Seam
Basic non-insulated structure for cost-sensitive applications.
VE TYPE
PVC Insulated with Easy Entry Sleeve
Simplifies wire insertion during crimping.
FD TYPE
PC Insulated - Double Crimp
Improved rigidity and structural support for demanding applications.
NYD TYPE
Nylon Insulated - Double Crimp
Nylon sleeve with reinforced double-crimp retention for stable connections.
| Color Code | Wire Size Range (mm2) | AWG | Max Current (A) | Notes |
|---|---|---|---|---|
| Yellow | 0.10-0.40 | 26-22 | 9 | Small-gauge insulated range. |
| Red | 0.25-1.65 | 20 | 12 | - |
| Blue | 1.04-2.63 | 18 | 17 | - |
| Black | 2.63-4.60 | 16 | 19 | - |
| Black | 2.63-4.60 | 14 | 27 | - |
| Yellow | 2.63-6.64 | 12 | 37 | - |
| Yellow | 2.63-6.64 | 10 | 48 | - |
| Red | 6.64-10.52 | 8 | 62 | - |
| Blue | 10.52-16.78 | 6 | 88 | - |
| Yellow | 16.78-26.66 | 4 | 115 | - |
| Red | 26.66-42.42 | 2 | 160 | - |
| Blue | 42.42-60.57 | 1/0 | 215 | Largest stable range retained in the main table. |
Section C
Stud Size Reference
Match stud diameter and terminal hole size to ensure stable fastening and contact consistency.
Stud and Hole Interpretation
Stud size indicates the bolt or screw diameter. Hole size indicates the opening needed on the terminal tongue. Keep clearance controlled to avoid loose fastening and vibration-related risk.
- Use actual fastener size as primary constraint.
- Avoid oversized hole clearance unless required by assembly tolerance.
- Verify both wire-side and stud-side requirements in final selection.
| Stud Size (inch) | Stud Size (mm) | Hole Size (mm) | Hole Size (inch) |
|---|---|---|---|
| #2 | 2.0 | 2.2 | .087 |
| #3 | 2.5 | 2.7 | .106 |
| #4 | 3.0 | 3.2 | .126 |
| #6 | 3.5 | 3.7 | .146 |
| #8 | 4.0 | 4.3 | .169 |
| #10 | 5.0 | 5.3 | .209 |
| 1/4" | 6.0 | 6.4 | .252 |
| 5/16" | 8.0 | 8.4 | .331 |
| 3/8" | 10.0 | 10.5 | .413 |
| 7/16" | 11.0 | 11.5 | .453 |
| 1/2" | 12.0 | 13.0 | .512 |
| 9/16" | 14.0 | 15.0 | .591 |
| 5/8" | 16.0 | 17.0 | .669 |
| 11/16" | 18.0 | 19.0 | .748 |
| 3/4" | 20.0 | 21.0 | .827 |
| 7/8" | 22.0 | 23.0 | .906 |
| 15/16" | 24.0 | 25.0 | .984 |
Quick Selection Logic
Choose by Terminal Form
Start with ring, spade, blade, pin, or disconnect form before checking other dimensions.
Confirm Insulation and Wire
Validate code, material, and wire-size interval from the stable range table.
Verify Stud Compatibility
Check stud size and required hole diameter to prevent mounting mismatch.