DTH Adapter (Sub) | Box to Pin · 75 sizes | Shandong Mainrock Group COMPANY

Finished adapters: black body, coated threads, box end up — Finished adapters: black phosphated body, coated threads at both ends

Adapter — Full Specifications

75 sizes, sorted by diameter; Box is the female end, Pin the male end

Diameter	Length, in / mm	Box (female)	Pin (male)	Wrench flats, in / mm	Weight, lb / kg
Φ76	5.5″ / 140	2 3/8 API REG	2 3/8 API REG	2.56″ / 65	9 / 4
Φ76	5.72″ / 145	2 3/8 API REG	RD 50-6	2.56″ / 65	9 / 4
Φ76	11.81″ / 300	2 3/8 API REG	2Z	2.62″ / 67	15 / 7
Φ89	5.5″ / 140	2 3/8 API REG	2 3/8 API REG	2.56″ / 65	13 / 6
Φ89	14″ / 356	2 3/8 API REG	3 1/2 IF	2.5″ / 64	46 / 21
Φ90	6″ / 152	2 7/8 API REG	2 3/8 API REG	2.56″ / 65	14 / 6.5
Φ95	5.13″ / 130	2 3/8 API REG	2 7/8 API REG	2.56″ / 65	18 / 8
Φ102	5.13″ / 130	2 3/8 API REG	2 3/8 API REG	3″ / 76	17 / 7.8
Φ102	5.5″ / 140	2 3/8 API REG	2 7/8 API REG	3″ / 76	18 / 8.2
Φ102	9″ / 229	2 7/8 API REG	2 7/8 API REG	3.5″ / 89	24 / 11
Φ102	9″ / 229	3 1/2 API REG	2 7/8 API REG	3.5″ / 89	24 / 11
Φ102	12″ / 305	3 1/2 API REG	2 7/8 API REG	3″ / 76	32 / 14.5
Φ102	13.38″ / 340	3 1/2 API REG	2 1/2 Z	3″ / 76	24 / 11
Φ102	14″ / 356	2 7/8 API REG	3 1/2 IF	3″ / 76	55 / 25
Φ114	6.29″ / 160	3 1/2 API REG	2 7/8 API REG	3.75″ / 95	16 / 7.5
Φ114	6.29″ / 160	3 1/2 API REG	2 7/8 IF	3.75″ / 95	18 / 8
Φ114	6.29″ / 160	3 1/2 API REG	3 1/2 API REG	3.75″ / 95	18 / 8
Φ114	6.29″ / 160	3 1/2 API REG	API NC 35	3.75″ / 95	22 / 10
Φ114	8.62″ / 219	3 1/2 API REG	2 3/8 API REG	3.75″ / 95	27.5 / 12.5
Φ114	9″ / 229	3 1/2 API REG	3 1/2 API REG	3.5″ / 89	22 / 10
Φ114	10″ / 254	3 1/2 API REG	2Z	3.5″ / 89	22 / 10
Φ114	11.75″ / 299	3 1/2 API REG	2 3/8 API REG	3.75″ / 95	35.7 / 16.2
Φ114	24″ / 607	4 1/2 API REG	3 1/2 API REG	3.5″ / 89	79 / 36
Φ114	38″ / 965	3 1/2 API REG	3 1/2 API REG	3.5″ / 89	141 / 64
Φ115	4.72″ / 120	2 3/8 API REG	3 1/2 API REG	3.75″ / 95	19 / 8.5
Φ127	9″ / 229	3 1/2 API REG	3 1/2 API REG	3.5″ / 89	44 / 20
Φ127	9″ / 229	3 1/2 API REG	3 1/2 BECO	3.5″ / 89	44 / 20
Φ127	16.5″ / 419	3 1/2 API REG	4 FH	3.5″ / 89	55 / 25
Φ127	19″ / 483	2 7/8 IF	4 FH	3.5″ / 89	79 / 36
Φ127	19″ / 483	3 1/2 API REG	4 FH	3.5″ / 89	57 / 26
Φ127	24″ / 607	3 1/2 API REG	3 1/2 API REG	3.5″ / 89	134 / 61
Φ127	36″ / 914	3 1/2 API REG	3 1/2 API REG	3.5″ / 89	159 / 72
Φ127	42″ / 1067	2 7/8 IF	4 FH	3.5″ / 89	183 / 83
Φ127	54″ / 1372	2 7/8 IF	4 FH	3.5″ / 89	236 / 107
Φ140	9″ / 229	4 1/2 API REG	3 1/2 API REG	4.5″ / 114	46 / 21
Φ140	9″ / 229	4 1/2 API REG	3 1/2 BECO	4.5″ / 114	46 / 21
Φ140	9.5″ / 241	2 7/8 IF	4 FH	3.5″ / 89	53 / 24
Φ140	19″ / 483	3 1/2 BECO	4 FH	4.5″ / 114	73 / 33
Φ140	24″ / 607	4 FH	2 7/8 IF	3.5″ / 89	81 / 37
Φ140	24″ / 607	4 1/2 API REG	3 1/2 BECO	4.5″ / 114	139 / 63
Φ140	32″ / 813	3 1/2 API REG	3 1/2 BECO	4.5″ / 114	189 / 86
Φ140	36″ / 914	4 1/2 API REG	3 1/2 BECO	4.5″ / 114	216 / 98
Φ146	5.16″ / 131	3 1/2 API REG	4 1/2 API REG	4.71″ / 120	36 / 16.5
Φ146	9.25″ / 235	4 1/2 API REG	3 1/2 API REG	3.75″ / 95	42 / 19
Φ146	19″ / 483	2 7/8 API REG	4 IF	3.5″ / 89	73 / 33
Φ152	19″ / 483	2 7/8 API REG	4 IF	3.5″ / 89	123 / 56
Φ152	19″ / 483	3 1/2 API REG	4 IF	3.5″ / 89	112 / 51
Φ152	19″ / 483	3 1/2 BECO	4 IF	3.5″ / 89	108 / 49
Φ152	19″ / 483	4 BECO	4 IF	4.5″ / 114	121 / 55
Φ159	8.5″ / 216	4 1/2 API REG	4 BECO	4.5″ / 114	57 / 26
Φ159	24″ / 607	4 1/2 API REG	4 BECO	4.5″ / 114	181 / 82
Φ159	32″ / 813	4 1/2 API REG	4 BECO	4.5″ / 114	247 / 112
Φ159	48″ / 1219	4 1/2 API REG	4 BECO	4.5″ / 114	374 / 170
Φ178	9″ / 229	4 1/2 API REG	4 1/2 BECO	5″ / 127	75 / 34
Φ178	15″ / 381	4 1/2 API REG	4 1/2 BECO	5.75″ / 146	143 / 65
Φ178	15″ / 381	6 5/8 API REG	4 1/2 BECO	5.75″ / 146	128 / 58
Φ178	25″ / 635	4 1/2 API REG	4 1/2 BECO	4.5″ / 114	238 / 108
Φ194	12″ / 305	6 5/8 API REG	5 1/4 BECO	6″ / 152	137 / 62
Φ194	15″ / 381	4 1/2 API REG	5 1/4 BECO	6.75″ / 171	172 / 78
Φ194	15″ / 381	5 1/2 API REG	4 1/2 BECO	6.75″ / 171	165 / 75
Φ194	15″ / 381	5 1/2 API REG	5 1/4 BECO	6.75″ / 171	163 / 74
Φ194	15″ / 381	6 5/8 API REG	5 1/4 BECO	6.75″ / 171	152 / 69
Φ194	19″ / 483	5 1/4 BECO	6 5/8 API REG	6.75″ / 171	211 / 96
Φ194	21″ / 533	5 1/4 BECO	6 5/8 API REG	6.75″ / 171	233 / 106
Φ194	25″ / 635	5 1/2 API REG	5 1/4 BECO	6.75″ / 171	365 / 165.9
Φ194	25″ / 635	6 5/8 API REG	5 1/4 BECO	6.75″ / 171	360 / 163.6
Φ194	27″ / 686	6 5/8 API REG	5 1/4 BECO	6.75″ / 171	284 / 129
Φ219	15″ / 381	6 5/8 API REG	6 BECO	7.75″ / 197	205 / 93
Φ219	25″ / 635	5 1/2 API REG	6 BECO	7.75″ / 197	366 / 166
Φ219	25″ / 635	6 5/8 API REG	6 BECO	7.75″ / 197	361 / 164
Φ219	47.5″ / 1207	6 5/8 API REG	6 BECO	7.75″ / 197	694 / 315
Φ226	24″ / 607	7 5/8 API REG	6 5/8 API REG	4.5″ / 114	293 / 133
Φ235	47.5″ / 1207	6 5/8 API REG	6 BECO	7.75″ / 197	802 / 364
Φ273	15″ / 381	6 5/8 API REG	8 BECO	9.25″ / 235	374 / 170
Φ273	25″ / 635	6 5/8 API REG	8 BECO	9.25″ / 235	608 / 276

Adapter section: female Box end on the left, male Pin end on the right, L is overall length — Box-to-Pin adapter section: female end (Box) on the left, male end (Pin) on the right, L is overall length.

What an adapter does

An adapter (sub) has different threads at each end. It changes diameter or thread standard so tools of different specs can be joined, and can also be used to extend the string or convert the rig output thread.

All entries are Box to Pin (female to male): one female end, one male end. Sizes marked — have no wrench flats and require a special tool to make up and break out.

Matching advice

Adapter threads must match the pipe and the hammer at both ends. When changing diameter, confirm both thread standards and hand (rotation) first, then choose wall thickness by bore — a sudden change in internal diameter costs air and traps cuttings.

Need a special thread combination?

Both thread ends can be combined as needed (diameter change, thread change, extension). Send us the two thread standards and the length and we will quote.

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