Premier Threaded Blow-Out Preventer 500T
The 5K-rated Premier threaded BOP delivers Snap-Loc™ seal integrity and inter-locking ram technology in a forged alloy body — 100% factory tested, NACE standard, -50°F rated. Same full opening bore connection options as the 300T.

Quick Specifications
BODY MATERIAL Forged Alloy Steel
SIZES 4" & 5" Nominal — Full Opening
RAM SIZES 1-¼", 1-½" & Blind
LOW TEMP RATING -50°F
NACE MR-01-75 Standard
FACTORY TESTED 100% Pressure Tested
CONNECTIONS — BOX UP 2-⅜" EUE · 2-⅞" EUE · 3-½" EUE · 3" LP
Key Features
WHY THE MODEL 300T
5000 PSI — Premier Threaded
At 5000 PSI, the 500T is the highest-rated threaded BOP in WSI's Premier line. Same Snap-Loc™ and inter-locking ram technology as the 300T — rated to higher pressure.
Pressure-Balanced Rams
Patented Snap-Loc™ Seal
WSI's patented Snap-Loc™ seal design provides positive closure that traditional ram packing cannot match under the pressure cycling demands of 5000 PSI service.
100% Factory Pressure Tested
Every 500T is individually pressure tested at the factory before shipment. Documented pressure test certification provided with each unit.
Inter-Locking Ram Design
NEW inter-locking ram design provides a positive engagement that prevents ram walkout — a known failure mode in conventional BOP designs under sustained wellbore pressure.
Same Dimensions as 300T
The 500T shares connection configurations with the 300T — upgrade from 3000 PSI to 5000 PSI service without changing your wellhead configuration.
Full Specifications
BODY MATERIAL Forged Alloy Steel
SIZES 4" & 5" Nominal — Full Opening
RAM SIZES 1-¼", 1-½" & Blind
LOW TEMP RATING -50°F
NACE MR-01-75 Standard
FACTORY TESTED 100% Pressure Tested
CONNECTIONS — BOX UP 2-⅜" EUE · 2-⅞" EUE · 3-½" EUE · 3" LP
Product Notes
- 5000 PSI working pressure — step up from 300T without changing connection configuration
- Patented Snap-Loc™ seal for superior closure integrity
- NEW inter-locking ram prevents ram walkout
- Pressure-balanced rams reduce operator closing effort
- Forged alloy steel body — no casting porosity risk
- 100% factory pressure tested before shipment
- NACE MR-01-75 standard
- Low temperature rated to -50°F
- Same connection options as 300T — EUE and LP combinations
Compatible Accessories
WSI accessories and complementary products for the 500T.
Step Down to 3000 PSI
300T
For wells not requiring 5000 PSI, the 300T provides the same Snap-Loc™ and inter-locking ram technology at 3000 PSI service.
Flanged BOP — 5000 PSI
Flanged version with integral tee and optional hydraulic actuation for 5000 PSI remote or automated well control applications.
Step Up to 10,000 PSI
Related Products
Other WSI products in the same category that may better suit your application, pressure requirements, or well conditions.

Premier Threaded 300T
3000 PSI

Premier Flanged 500F
5000 PSI

Premier Flanged 1000F
10,000 PSI

Economy Hammer Cap 300
3000 PSI
