THREADING
Y Y
ER/L-API RD X
di
External API - Oil Thread Round X
Profile Laydown Threading Inserts l l
di
External right-hand shown
NUT Dimensions Tough 1 Hard
30° 30°

IPF
TAPER 1:16 90°


IC50M
IC250
IC508
IC908
SCREW
Designation di TPI l IPF X Y Z(2)
16ER 10 API RD 9.52 10.0 16.00 0.75 1.5 1.4 1 • • •
16ER/L 8 API RD 9.52 8.0 16.00 0.75 1.3 1.6 1 • • • •
22ER 10 API RD 2M (1) 12.70 10.0 22.00 0.75 2.4 3.7 2 •
27ER 10 API RD 3M (1) 15.88 10.0 27.00 0.75 3.8 6.2 3 •
27ER 8 API RD 2M (1) 15.88 8.0 27.00 0.75 3.0 4.5 2 •
• For Insert Identification System, see page 489 • API Spec 5B8-1996. • For technical information and detailed cutting data, see pages 536-546
• For recommended number of passes for multi-tooth inserts, see page 544
(1) Multi-tooth
(2) Number of teeth per corner.
For tools, see pages: C#-SER/L (530) • SER-D (530) • SER/L (529)


Y Y
IR/L-API RD X
di
Internal API - Oil Thread Round
X
Profile Laydown Threading Inserts l l
di
Internal left-hand shown
NUT Dimensions Tough 1 Hard
30° 30°

IPF
TAPER 1:16 90°


IC50M
IC228


IC250
IC908
SCREW
Designation di TPI l IPF X Y Z(2)
16IR/L 10 API RD 9.52 10.0 16.00 0.75 1.5 1.4 1 • • • •
16IR/L 8 API RD 9.52 8.0 16.00 0.75 1.3 1.6 1 • •
22IR 10 API RD 2M (1) 12.70 10.0 22.00 0.75 2.4 3.7 2 •
27IR 10 API RD 3M (1) 15.88 10.0 27.00 0.75 3.8 6.2 3 •
27IR 8 API RD 2M (1) 15.88 8.0 27.00 0.75 3.0 4.5 2 •
• For Insert Identification System, see page 489 • API Spec 5B8-1996. • For technical information and detailed cutting data, see pages 536-546
• For recommended number of passes for multi-tooth inserts see page 544
(1) Multi-tooth
(2) Number of teeth per corner.
For tools, see pages: SIR/L (531)


Y
ER/L-API
X
External API - Oil Thread Profile l
Laydown Threading Inserts
di
External right-hand shown
P NUT Tough 1
30° 30° Dimensions
Hard
IC50M


90° IPF
IC250
IC908


SCREW
Designation di TPI l IPF X Y Size(4)
22ER/L 5 API 403 (1) 12.70 5.0 22.00 3 1.8 2.5 2.375"-4.5"REG • • •
27ER/L 4 API 382 (2) 15.88 4.0 27.00 2 2.1 2.8 NC23-NC50 • •
27ER 4 API 383 (2) 15.88 4.0 27.00 3 2.1 2.8 NC56-NC77 • •
27ER/L 4 API 502 (3) 15.88 4.0 27.00 2 2.0 3.0 6-5/8" REG • • •
27ER 4 API 503 (3) 15.88 4.0 27.00 3 2.0 3.0 5-1/2,7-5/8,8-5/8REG • • •
• For Insert Identification System, see page 489 • For technical information and detailed cutting data, see pages 536-546
(1) V-0.040
(2) V-0.038R
(3) V-0.050
(4) Connection no. or size
For tools, see pages: C#-SER/L (530) • SER-D (530) • SER/L (529)


521