MT172SS / MT173A Ball-Detent Quick-Release Pins
Removable locating and retaining pins with a solid shank and spring-loaded ball detents. MT172SS configurations use a cylindrical handle with a pull ring. The MT173A configurations have a plain cylindrical head. Choose the exact model, shaft diameter and usable grip length for your assembly.
How to select and use
B is nominal shaft diameter and L is usable grip length, not overall length. Insert the pin through the aligned holes until the detents engage beyond the retained part. Use the head or pull ring for manual removal and check that the retained stack and hole clearance match the model-specific drawing. The drawings preserve the original metric tolerances; inches are approximate metric conversions.
Standard MT172SS pins and detent balls are specified as SUS304. The MT173A source states stainless steel without a grade. The 16 x 133 mm version has its own geometry and ring dimensions, so use its dedicated drawing rather than the regular 16 mm drawing.
Applications
Suitable selection contexts include removable fixture joints, locating interfaces and equipment assemblies requiring frequent pin insertion or removal. Confirm the required retention and fit for your assembly using the actual dimensions. No load rating is supplied in this listing.
The compact-head 6 x 20 mm option uses a 9.5 mm diameter, 12.7 mm long handle. The regular 6 x 20 mm option uses an 11 mm diameter, 22 mm long handle; each has its own source drawing.
Package and configuration
Each selected option is one pin. The white cover illustrates two different configurations and does not indicate a two-piece set. A separate retaining lanyard is not included.
Original Product and Technical Views
All listed configurations have their own original dimension sheet in the product gallery. The representative views below cover each diameter, plain-head configuration and the distinct 16 x 133 mm configuration.
Available configurations and prices
| Configuration | Material | Price USD |
|---|---|---|
| MT172SS | D4 x L10 mm (0.157 x 0.394 in) | SUS304 | $10.78 |
| MT172SS | D4 x L15 mm (0.157 x 0.591 in) | SUS304 | $11.55 |
| MT172SS | D4 x L20 mm (0.157 x 0.787 in) | SUS304 | $11.88 |
| MT172SS | D4 x L25 mm (0.157 x 0.984 in) | SUS304 | $12.10 |
| MT172SS | D4 x L30 mm (0.157 x 1.181 in) | SUS304 | $12.71 |
| MT172SS | D4 x L35 mm (0.157 x 1.378 in) | SUS304 | $13.75 |
| MT172SS | D4 x L40 mm (0.157 x 1.575 in) | SUS304 | $14.52 |
| MT172SS | D4 x L45 mm (0.157 x 1.772 in) | SUS304 | $14.74 |
| MT172SS | D4 x L50 mm (0.157 x 1.969 in) | SUS304 | $15.02 |
| MT172SS | D4 x L55 mm (0.157 x 2.165 in) | SUS304 | $15.38 |
| MT172SS | D4 x L60 mm (0.157 x 2.362 in) | SUS304 | $16.62 |
| MT172SS | D5 x L10 mm (0.197 x 0.394 in) | SUS304 | $6.47 |
| MT172SS | D5 x L15 mm (0.197 x 0.591 in) | SUS304 | $7.70 |
| MT172SS | D5 x L20 mm (0.197 x 0.787 in) | SUS304 | $7.70 |
| MT172SS | D5 x L25 mm (0.197 x 0.984 in) | SUS304 | $7.48 |
| MT172SS | D5 x L30 mm (0.197 x 1.181 in) | SUS304 | $8.80 |
| MT172SS | D5 x L35 mm (0.197 x 1.378 in) | SUS304 | $7.65 |
| MT172SS | D5 x L40 mm (0.197 x 1.575 in) | SUS304 | $8.03 |
| MT172SS | D5 x L45 mm (0.197 x 1.772 in) | SUS304 | $8.25 |
| MT172SS | D5 x L50 mm (0.197 x 1.969 in) | SUS304 | $8.58 |
| MT172SS | D5 x L55 mm (0.197 x 2.165 in) | SUS304 | $8.91 |
| MT172SS | D5 x L60 mm (0.197 x 2.362 in) | SUS304 | $8.91 |
| MT172SS | D5 x L65 mm (0.197 x 2.559 in) | SUS304 | $10.23 |
| MT172SS | D5 x L70 mm (0.197 x 2.756 in) | SUS304 | $10.45 |
| MT172SS | D5 x L75 mm (0.197 x 2.953 in) | SUS304 | $10.89 |
| MT172SS | D5 x L80 mm (0.197 x 3.150 in) | SUS304 | $11.33 |
| MT172SS | D5 x L85 mm (0.197 x 3.346 in) | SUS304 | $11.55 |
| MT172SS | D5 x L90 mm (0.197 x 3.543 in) | SUS304 | $11.99 |
| MT172SS | D5 x L95 mm (0.197 x 3.740 in) | SUS304 | $12.65 |
| MT172SS | D5 x L100 mm (0.197 x 3.937 in) | SUS304 | $13.53 |
| MT172SS | D5 x L110 mm (0.197 x 4.331 in) | SUS304 | $27.50 |
| MT172SS | D5 x L120 mm (0.197 x 4.724 in) | SUS304 | $38.50 |
| MT172SS | D5 x L130 mm (0.197 x 5.118 in) | SUS304 | $49.50 |
| MT172SS | D5 x L140 mm (0.197 x 5.512 in) | SUS304 | $60.50 |
| MT172SS | D5 x L150 mm (0.197 x 5.906 in) | SUS304 | $77.00 |
| MT172SS | D6 x L10 mm (0.236 x 0.394 in) | SUS304 | $6.60 |
| MT172SS | D6 x L15 mm (0.236 x 0.591 in) | SUS304 | $7.15 |
| MT172SS | D6 x L20 mm (0.236 x 0.787 in) | SUS304 | $7.48 |
| MT172SS | D6 x L20 mm (0.236 x 0.787 in) | Compact head | SUS304 | $5.61 |
| MT172SS | D6 x L25 mm (0.236 x 0.984 in) | SUS304 | $7.81 |
| MT172SS | D6 x L30 mm (0.236 x 1.181 in) | SUS304 | $8.14 |
| MT172SS | D6 x L35 mm (0.236 x 1.378 in) | SUS304 | $8.25 |
| MT172SS | D6 x L40 mm (0.236 x 1.575 in) | SUS304 | $8.58 |
| MT172SS | D6 x L45 mm (0.236 x 1.772 in) | SUS304 | $8.91 |
| MT172SS | D6 x L50 mm (0.236 x 1.969 in) | SUS304 | $8.91 |
| MT172SS | D6 x L55 mm (0.236 x 2.165 in) | SUS304 | $9.35 |
| MT172SS | D6 x L60 mm (0.236 x 2.362 in) | SUS304 | $11.55 |
| MT172SS | D6 x L65 mm (0.236 x 2.559 in) | SUS304 | $12.10 |
| MT172SS | D6 x L70 mm (0.236 x 2.756 in) | SUS304 | $12.65 |
| MT172SS | D6 x L75 mm (0.236 x 2.953 in) | SUS304 | $13.20 |
| MT172SS | D6 x L80 mm (0.236 x 3.150 in) | SUS304 | $13.75 |
| MT172SS | D6 x L85 mm (0.236 x 3.346 in) | SUS304 | $15.40 |
| MT172SS | D6 x L90 mm (0.236 x 3.543 in) | SUS304 | $16.50 |
| MT172SS | D6 x L95 mm (0.236 x 3.740 in) | SUS304 | $17.05 |
| MT172SS | D6 x L100 mm (0.236 x 3.937 in) | SUS304 | $17.60 |
| MT172SS | D6 x L110 mm (0.236 x 4.331 in) | SUS304 | $27.50 |
| MT172SS | D6 x L120 mm (0.236 x 4.724 in) | SUS304 | $38.50 |
| MT172SS | D6 x L130 mm (0.236 x 5.118 in) | SUS304 | $49.50 |
| MT172SS | D6 x L140 mm (0.236 x 5.512 in) | SUS304 | $60.50 |
| MT172SS | D6 x L150 mm (0.236 x 5.906 in) | SUS304 | $77.00 |
| MT172SS | D8 x L10 mm (0.315 x 0.394 in) | SUS304 | $6.05 |
| MT172SS | D8 x L15 mm (0.315 x 0.591 in) | SUS304 | $7.15 |
| MT172SS | D8 x L20 mm (0.315 x 0.787 in) | SUS304 | $7.70 |
| MT172SS | D8 x L25 mm (0.315 x 0.984 in) | SUS304 | $8.14 |
| MT172SS | D8 x L30 mm (0.315 x 1.181 in) | SUS304 | $8.58 |
| MT172SS | D8 x L35 mm (0.315 x 1.378 in) | SUS304 | $8.91 |
| MT172SS | D8 x L40 mm (0.315 x 1.575 in) | SUS304 | $9.35 |
| MT172SS | D8 x L45 mm (0.315 x 1.772 in) | SUS304 | $9.68 |
| MT172SS | D8 x L50 mm (0.315 x 1.969 in) | SUS304 | $10.01 |
| MT172SS | D8 x L55 mm (0.315 x 2.165 in) | SUS304 | $10.34 |
| MT172SS | D8 x L60 mm (0.315 x 2.362 in) | SUS304 | $10.45 |
| MT172SS | D8 x L65 mm (0.315 x 2.559 in) | SUS304 | $13.75 |
| MT172SS | D8 x L70 mm (0.315 x 2.756 in) | SUS304 | $14.30 |
| MT172SS | D8 x L75 mm (0.315 x 2.953 in) | SUS304 | $15.40 |
| MT172SS | D8 x L80 mm (0.315 x 3.150 in) | SUS304 | $16.50 |
| MT172SS | D8 x L85 mm (0.315 x 3.346 in) | SUS304 | $17.60 |
| MT172SS | D8 x L90 mm (0.315 x 3.543 in) | SUS304 | $18.70 |
| MT172SS | D8 x L95 mm (0.315 x 3.740 in) | SUS304 | $19.80 |
| MT172SS | D8 x L100 mm (0.315 x 3.937 in) | SUS304 | $20.90 |
| MT172SS | D10 x L10 mm (0.394 x 0.394 in) | SUS304 | $7.70 |
| MT172SS | D10 x L20 mm (0.394 x 0.787 in) | SUS304 | $8.25 |
| MT172SS | D10 x L25 mm (0.394 x 0.984 in) | SUS304 | $9.35 |
| MT172SS | D10 x L30 mm (0.394 x 1.181 in) | SUS304 | $9.35 |
| MT172SS | D10 x L35 mm (0.394 x 1.378 in) | SUS304 | $11.35 |
| MT172SS | D10 x L40 mm (0.394 x 1.575 in) | SUS304 | $12.10 |
| MT172SS | D10 x L45 mm (0.394 x 1.772 in) | SUS304 | $12.10 |
| MT172SS | D10 x L50 mm (0.394 x 1.969 in) | SUS304 | $12.10 |
| MT172SS | D10 x L55 mm (0.394 x 2.165 in) | SUS304 | $13.20 |
| MT172SS | D10 x L60 mm (0.394 x 2.362 in) | SUS304 | $14.30 |
| MT172SS | D10 x L65 mm (0.394 x 2.559 in) | SUS304 | $17.60 |
| MT172SS | D10 x L70 mm (0.394 x 2.756 in) | SUS304 | $16.50 |
| MT172SS | D10 x L80 mm (0.394 x 3.150 in) | SUS304 | $18.70 |
| MT172SS | D10 x L90 mm (0.394 x 3.543 in) | SUS304 | $20.90 |
| MT172SS | D10 x L100 mm (0.394 x 3.937 in) | SUS304 | $22.00 |
| MT172SS | D10 x L110 mm (0.394 x 4.331 in) | SUS304 | $27.50 |
| MT172SS | D10 x L120 mm (0.394 x 4.724 in) | SUS304 | $38.50 |
| MT172SS | D12 x L10 mm (0.472 x 0.394 in) | SUS304 | $8.80 |
| MT172SS | D12 x L20 mm (0.472 x 0.787 in) | SUS304 | $9.35 |
| MT172SS | D12 x L25 mm (0.472 x 0.984 in) | SUS304 | $9.98 |
| MT172SS | D12 x L30 mm (0.472 x 1.181 in) | SUS304 | $10.45 |
| MT172SS | D12 x L35 mm (0.472 x 1.378 in) | SUS304 | $13.72 |
| MT172SS | D12 x L40 mm (0.472 x 1.575 in) | SUS304 | $12.10 |
| MT172SS | D12 x L45 mm (0.472 x 1.772 in) | SUS304 | $15.38 |
| MT172SS | D12 x L50 mm (0.472 x 1.969 in) | SUS304 | $14.30 |
| MT172SS | D12 x L55 mm (0.472 x 2.165 in) | SUS304 | $18.71 |
| MT172SS | D12 x L60 mm (0.472 x 2.362 in) | SUS304 | $16.50 |
| MT172SS | D12 x L65 mm (0.472 x 2.559 in) | SUS304 | $18.70 |
| MT172SS | D12 x L70 mm (0.472 x 2.756 in) | SUS304 | $18.70 |
| MT172SS | D12 x L80 mm (0.472 x 3.150 in) | SUS304 | $20.90 |
| MT172SS | D12 x L90 mm (0.472 x 3.543 in) | SUS304 | $23.10 |
| MT172SS | D12 x L100 mm (0.472 x 3.937 in) | SUS304 | $27.50 |
| MT172SS | D12 x L110 mm (0.472 x 4.331 in) | SUS304 | $38.50 |
| MT172SS | D12 x L120 mm (0.472 x 4.724 in) | SUS304 | $49.50 |
| MT172SS | D12 x L130 mm (0.472 x 5.118 in) | SUS304 | $60.50 |
| MT172SS | D12 x L140 mm (0.472 x 5.512 in) | SUS304 | $71.50 |
| MT172SS | D12 x L150 mm (0.472 x 5.906 in) | SUS304 | $88.00 |
| MT172SS | D16 x L10 mm (0.630 x 0.394 in) | SUS304 | $15.07 |
| MT172SS | D16 x L15 mm (0.630 x 0.591 in) | SUS304 | $15.40 |
| MT172SS | D16 x L20 mm (0.630 x 0.787 in) | SUS304 | $20.13 |
| MT172SS | D16 x L25 mm (0.630 x 0.984 in) | SUS304 | $17.38 |
| MT172SS | D16 x L30 mm (0.630 x 1.181 in) | SUS304 | $18.70 |
| MT172SS | D16 x L35 mm (0.630 x 1.378 in) | SUS304 | $19.36 |
| MT172SS | D16 x L40 mm (0.630 x 1.575 in) | SUS304 | $20.90 |
| MT172SS | D16 x L45 mm (0.630 x 1.772 in) | SUS304 | $22.00 |
| MT172SS | D16 x L50 mm (0.630 x 1.969 in) | SUS304 | $23.10 |
| MT172SS | D16 x L55 mm (0.630 x 2.165 in) | SUS304 | $24.75 |
| MT172SS | D16 x L60 mm (0.630 x 2.362 in) | SUS304 | $26.95 |
| MT172SS | D16 x L65 mm (0.630 x 2.559 in) | SUS304 | $28.38 |
| MT172SS | D16 x L70 mm (0.630 x 2.756 in) | SUS304 | $31.01 |
| MT172SS | D16 x L75 mm (0.630 x 2.953 in) | SUS304 | $31.90 |
| MT172SS | D16 x L80 mm (0.630 x 3.150 in) | SUS304 | $34.65 |
| MT172SS | D16 x L85 mm (0.630 x 3.346 in) | SUS304 | $36.30 |
| MT172SS | D16 x L90 mm (0.630 x 3.543 in) | SUS304 | $39.05 |
| MT172SS | D16 x L95 mm (0.630 x 3.740 in) | SUS304 | $40.70 |
| MT172SS | D16 x L100 mm (0.630 x 3.937 in) | SUS304 | $43.45 |
| MT172SS | D16 x L110 mm (0.630 x 4.331 in) | SUS304 | $77.00 |
| MT172SS | D16 x L120 mm (0.630 x 4.724 in) | SUS304 | $82.50 |
| MT172SS | D16 x L130 mm (0.630 x 5.118 in) | SUS304 | $88.00 |
| MT172SS | D16 x L133 mm (0.630 x 5.236 in) | SUS304 | $49.00 |
| MT172SS | D16 x L140 mm (0.630 x 5.512 in) | SUS304 | $110.00 |
| MT172SS | D16 x L150 mm (0.630 x 5.906 in) | SUS304 | $132.00 |
| MT172SS | D20 x L10 mm (0.787 x 0.394 in) | SUS304 | $20.90 |
| MT172SS | D20 x L15 mm (0.787 x 0.591 in) | SUS304 | $28.60 |
| MT172SS | D20 x L20 mm (0.787 x 0.787 in) | SUS304 | $29.70 |
| MT172SS | D20 x L25 mm (0.787 x 0.984 in) | SUS304 | $30.80 |
| MT172SS | D20 x L30 mm (0.787 x 1.181 in) | SUS304 | $31.68 |
| MT172SS | D20 x L35 mm (0.787 x 1.378 in) | SUS304 | $31.90 |
| MT172SS | D20 x L40 mm (0.787 x 1.575 in) | SUS304 | $34.10 |
| MT172SS | D20 x L45 mm (0.787 x 1.772 in) | SUS304 | $40.70 |
| MT172SS | D20 x L50 mm (0.787 x 1.969 in) | SUS304 | $44.00 |
| MT172SS | D20 x L55 mm (0.787 x 2.165 in) | SUS304 | $45.10 |
| MT172SS | D20 x L60 mm (0.787 x 2.362 in) | SUS304 | $50.60 |
| MT172SS | D20 x L65 mm (0.787 x 2.559 in) | SUS304 | $53.90 |
| MT172SS | D20 x L70 mm (0.787 x 2.756 in) | SUS304 | $58.30 |
| MT172SS | D20 x L75 mm (0.787 x 2.953 in) | SUS304 | $59.40 |
| MT172SS | D20 x L80 mm (0.787 x 3.150 in) | SUS304 | $61.60 |
| MT172SS | D20 x L85 mm (0.787 x 3.346 in) | SUS304 | $62.70 |
| MT172SS | D20 x L90 mm (0.787 x 3.543 in) | SUS304 | $63.80 |
| MT172SS | D20 x L95 mm (0.787 x 3.740 in) | SUS304 | $64.90 |
| MT172SS | D20 x L100 mm (0.787 x 3.937 in) | SUS304 | $69.30 |
| MT172SS | D25 x L40 mm (0.984 x 1.575 in) | SUS304 | $63.80 |
| MT172SS | D25 x L45 mm (0.984 x 1.772 in) | SUS304 | $67.10 |
| MT172SS | D25 x L50 mm (0.984 x 1.969 in) | SUS304 | $69.30 |
| MT172SS | D25 x L55 mm (0.984 x 2.165 in) | SUS304 | $80.30 |
| MT172SS | D25 x L60 mm (0.984 x 2.362 in) | SUS304 | $80.30 |
| MT172SS | D25 x L70 mm (0.984 x 2.756 in) | SUS304 | $83.60 |
| MT172SS | D25 x L80 mm (0.984 x 3.150 in) | SUS304 | $85.80 |
| MT172SS | D25 x L90 mm (0.984 x 3.543 in) | SUS304 | $96.80 |
| MT172SS | D25 x L100 mm (0.984 x 3.937 in) | SUS304 | $102.30 |
| MT173A | D4.8 x L10 mm (0.189 x 0.394 in) | Stainless steel (grade not specified) | $6.67 |
| MT173A | D4.8 x L15 mm (0.189 x 0.591 in) | Stainless steel (grade not specified) | $7.00 |