Test Connections Inc.

3.74" MUSIC WIRE TRANSLATION PINS
WITH RETAINING DIMPLE

SERIES 75D 

Tool Bar

These pins have a retaining dimple that keeps the pins from falling out of the fixture (see illustration). they are capable of testing SMD products on centers of: .050, .040, .025, and as low as .010 mil. they also allow testing of high density boards with the standard .100 mil. grid. It is possible to fan the pins up to .400 inches off center, and still maintain excellent contact. The use of a three plate system is recommended.
Custom designs can also be supplied.

MATERIAL:
Head:
Hardened Beryllium Copper, Gold Plated
Shaft: Music Wire, Nickel Plated

RECOMMENDED HOLE SIZES 

DASH
NO.
 

TOP
PLATE
 
DIA. 

DRILL 

RETAINING
PLATE
 
DIA. 

DRILL 

-050 
.055 

#54

.037 

#63 

-119 
.075 

1.90mm

.037 

#63 

-120 
.064

#52 

.037 

#63 

-130 
.026

#71 

.028

#70 

-131 
.035

#65 

.037 

#63

-132 
.055

#54 

.057

1.45mm

-136 
.102

2.60mm

.037 

#63 

-138 
.142

3.60mm

.037 

#63 

-140 
.043

#57

.045

1.15mm

-142 
.018

#77 

.020

#76 

-151 
.0225 

#74 

.025 

#72 

-152 
.026 

#71 

.028 

#70 

-154 
.020 

#76 

.0217 

.55mm 

-156 
.161 

#20 

.037 

#63 

-157 
.055 

#54 

.057 

1.45mm 

-158 
.055 

#54 

.057 

1.45mm 

-160 
.0225 

#74 

.025 

#72 

-162 
.035 

#65 

.037 

#63 

-163 
.018 

#77 

.020 

#76 

-174 
.043 

#57 

.045 

1.15mm 

 

 

75D-XXX
CONICAL
W/RADIUS
 
 For use with SMD pads and component holes.

PART NO. 

DIA. "A" 

DIA. "B" 

75D-151 

.020 (.51) 

 .025 (.64)

75D-130 

.023 (.58) 

.030 (.76) 

75D-131 

.032 (.81) 

.040 (1.02) 

75D-140 

.040 (1.02) 

.048 (1.22) 

75D-132 

.051 (1.30) 

.061 (1.55) 
 

75-XXX
INSULATED
 
 An insulated pin, used when pins may touch.



 

PART No.

DIA. "A" 

DIA. "B" 

DIA. "C" 

75D-163 

.016 (.41)

.023 (.58) 

.018 (.48) 

75D-160 

.020 (.51)

.027 (.69) 

.022 (.56) 

75D-152 

.023 (.58)

.032 (.81) 

.025 (.64) 

75D-162 

.032 (.81)

.042 (1.07) 

.034 (.86) 

75D-158
PYRAMID
 
 Material: Spring Brass.
 

75D-XXX
CONE W/FLAT
 
Used for testing plated thru holes.
 

PART NUMBER 

DIAMETER "A" 

75-050 

.050 (1.27) 

75-119 

.071 (1.80) 

75-136 

.098 (2.50) 

75-138 

138 (3.50) 

75-156 

.156 (3.96) 
MATERIAL:
Head: Hardened Beryllium Copper, Gold Plated
Shaft: Music Wire, Nickel Plated

75D-XXX
POINTED TIP
 
 For use with SMD pads.

PART NO. 

DIA. "A" 

DIA. "B" 

75D-142 

.016 (.41) 

.021 (.53) 

75D-154 

.018 (.46) 

.023 (.58) 
 

75-120
DOME
 
 Used with Gold Fingers.
 
MATERIAL:
Head: Hardened Beryllium Copper, Gold Plated
Shaft: Music Wire, Nickel Plated
 
75D-XXX
DOME
 
 Material: Spring Brass.

PART NO. 

DIA. "A" 

DIA. "B" 

RAD. "R" 

75D-174 

.040 (1.02)

.048 (1.22) 

.040 (1.02) 

75D-157 

.051 (1.30) 

.061 (1.55) 

.077 (1.96)