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Micro Tap and Die Sizes


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Found this info at Newman Tools website

 

The Unified National Miniature Thread Series (miniature metric thread) was accepted as a new thread series in 1958 and was intended for general-purpose use in instruments, miniature mechanisms, and for jewelry and watches. The use of this series is recommended for all new products in place of the old standard miniature and the many improvised thread sizes still in existence. We will continue to supply the ongoing demand for the old standard miniature screw threads.

The UNM thread series has fourteen miniature metric thread sizes that are systematically distributed from .30mm to 1.40mm in diameter and supplements the Unified and American Thread Series that begins at .060 inch diameter. The diameter-pitch combinations provide for maximum strength against stripping and for excellent manufacturability and interchangeability.


Technical data contained in this site is taken from Fed-Std-H28/5 and ASME B1.10M-1997.

Designation

Major Dia

Pitch mm

Approximate Threads per inch

.30 UNM

.30mm (.0118)

0.080

318

.35 UNM

.35mm (.0138)

0.090

282

.40 UNM

.40mm (.0157)

0.100

254

.45 UNM

.45mm (.0177)

0.100

254

.50 UNM

.50mm (.0197)

0.125

203

.55 UNM

.55mm (.0217)

0.125

203

.60 UNM

.60mm (.0236)

0.150

169

.70 UNM

.70mm (.0276)

0.175

145

.80 UNM

.80mm (.0315)

0.200

127

.90 UNM

.90mm (.0354)

0.225

113

1.00 UNM

1.00mm (.0394)

0.250

102

1.10 UNM

1.10mm (.0433)

0.250

102

1.20 UNM

1.20mm (.0472)

0.250

102

1.40 UNM

1.40mm (.0551)

0.300

85

 

 

Common Old Standard Miniature Instrument Threads

 

Designation

Major Dia

Threads per inch

00-90

0.047

90

00-96

0.047

96

00-112

0.047

112

000-120

0.034

120

0000-160

0.021

160

 

Miniature Taps

 

 

CUT THREADS

FORMED
THREADS

THREAD
SIZE

UP TO 2/3 MAJ DIA * 2/3 TO 1 1/2 MAJ DIA * 1 1/2 TO 3 MAJ DIA *  

Min

Max

Min

Max

Min

Max

1.40 UNM

0.0439

0.0455

0.0450

0.0471

0.0460

0.0481

0.0498

1.20 UNM

0.0379

0.0393

0.0388

0.0406

0.0397

0.0415

0.0438

1.10 UNM

0.0340

0.0354

0.0349

0.0367

0.0358

0.0376

0.0397

1.00 UNM

0.0300

0.0314

0.0309

0.0327

0.0319

0.0337

0.0358

0.90 UNM

0.0270

0.0283

0.0279

0.0295

0.0287

0.0304

0.0318

0.80 UNM

0.0241

0.0252

0.0248

0.0263

0.0256

0.0270

0.0283

0.70 UNM

0.0211

0.0221

0.0217

0.0231

0.0224

0.0237

0.0248

0.60 UNM

0.0181

0.0190

0.0187

0.0198

0.0193

0.0204

0.0212

0.55 UNM

0.0170

0.0178

0.0176

0.0186

0.0181

0.0191

0.0195

0.50 UNM

0.0150

0.0158

0.0156

0.0166

0.0161

0.0171

 
0.45 UNM

0.0141

0.0147

0.0145

0.0154

0.0149

0.0158

 
0.40 UNM

0.0121

0.0127

0.0125

0.0134

0.0130

0.0138

 
0.35 UNM

0.0105

0.0111

0.0109

0.0117

0.0113

0.0121

 
0.30 UNM

0.0089

0.0095

0.0093

0.0100

0.0096

0.0104

 
 
00-90

0.0358

0.0380

0.0374

0.0395

0.0385

0.0405

0.0426

00-96

0.0371

0.0385

0.0381

0.0400

0.0390

0.0409

0.0429

00-112

0.0386

0.0398

0.0394

0.0410

0.0402

0.0419

0.0435

000-120

0.0261

0.0273

0.0270

0.0280

0.0277

0.0293

0.0306

0000-160

0.0151

0.0160

0.0157

0.0170

0.0164

0.0176

0.0184

 

 

Edited by grsjax
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