API Round (RD) Oilfield Threading Inserts
Ideal for: Oilfield Casing, Production Tubing, Downhole Accessories.
- Product Standard: API Round (RD) Casing & Tubing Full Profile laydown threading inserts (API Spec 5B).
- Leak Resistant: Features the industry-standard rounded crest and root geometry to ensure tight, leak-resistant seals in oil and gas strings.
- Pitch Options: Dedicated 10 TPI (Tubing) and 8 TPI (Casing) models.
- Core Availability: Stocked in the versatile 16er threading insert (3/8″ I.C.) and heavy-duty 1/2″ (22mm) I.C. sizes.
- Versatility: High-performance threading inserts for lathe applications, available in External (ER), Internal (IR), and left hand thread insert configurations.
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Material: Specialized carbide threading inserts grade optimized for machining high-tensile J55, K55, and N80 grade steels.
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Product Overview
Manufacture reliable, API-compliant oilfield connections with our API Round (RD) laydown threading inserts. Designed for the specific requirements of the oil and gas industry, these inserts produce the rounded thread form defined by API Specification 5B for Casing and Tubing.
Featuring a “Full Profile” geometry, these carbide threading inserts cut the groove and top the crest in a single pass. The rounded profile minimizes stress concentration and galling during make-up, which is critical for maintaining seal integrity in downhole environments.
Key Features & Benefits
- Industry Standard: The round thread form is the most common connection for general purpose well applications.
- The 16ER Standard: Our 16er threading inserts (e.g., 16ER 8 API RD) efficiently handle standard pipe diameters, compatible with standard ISO tool holders.
- Heavy Duty Capability: For larger casing sizes or heavy wall pipes requiring greater stability, we supply robust 1/2″ (22mm) I.C. inserts.
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Directional Options: We provide comprehensive solutions, including standard right-hand tools and specialized left hand thread insert models (e.g., 16EL 10 API RD) for crossovers and fishing tools.
External API RD Insert Model
| I.C. | Pitch (TPI) | Right-hand | Left-hand | L | X | Y |
|---|---|---|---|---|---|---|
| 3/8″ | 10 | 16ER10 API RD | 16EL10 API RD | 16 | 1.1 | 1.2 |
| 3/8″ | 8 | 16ER8 API RD | 16EL8 API RD | 16 | 1.4 | 1.3 |
| 1/2″ | 10 | 22ER10 API RD | 22EL10 API RD | 22 | 1.5 | 1.7 |
| 1/2″ | 8 | 22ER8 API RD | 22EL8 API RD | 22 | 2.2 | 2.3 |
Internal API RD Insert Model
| I.C. | Pitch (TPI) | Right-hand | Left-hand | L | X | Y |
|---|---|---|---|---|---|---|
| 3/8″ | 10 | 16IR10 API RD | 16IL10 API RD | 16 | 1.1 | 1.2 |
| 3/8″ | 8 | 16IR8 API RD | 16IL8 API RD | 16 | 1.4 | 1.4 |
| 1/2″ | 10 | 22IR10 API RD | 22IL10 API RD | 22 | 1.5 | 1.7 |
| 1/2″ | 8 | 22IR8 API RD | 22IL8 API RD | 22 | 2.2 | 2.3 |
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