7° x 45° Buttress inch screw threads are specialized, asymmetrical threads designed for high axial loads in one direction, featuring a steep load flank (often 45° or 30°) and a shallow bearing flank for high strength, used in jacks, presses, and artillery, with standards like ASME B1.9 defining their inch-based dimensions and profiles.
Asymmetrical Profile: Has one steep (load-bearing) side and one gentle (thrust) side, unlike standard V-threads.
One-Way Load: Efficiently transmits force in one direction, making them ideal for applications with significant axial thrust.
High Load Capacity: Stronger in shear than other thread forms, supporting heavy loads.
Inch Standards: Governed by standards like ASME B1.9, specifying dimensions (like 7°/45° or 7°/30° profiles) for inch-based systems.
Instructions:
1）Implementation of standards：ASME B1.9-1973
2）Material: GCr15， Measuring surface hardness 60-63HRC;
3）Comes with the calibration certificates, Traceable to NIM or NIST, Availiable for Audit.
How to order?
For example:
Pls mark : Ring Gage : 3-1/4″-12 BUTT -3A Go / No Go ; Plug Gage : 3-1/4″-12 BUTT -3B Go/No Go
and E-mail to: sales@fyougauges.com
Super Size thread Gages is available, till to Max Size: 1000 mm ,come with long form calibration certificate.
7° x 45° Buttress Series Contact Points
API Regular Rotary Shoulder Connection Thread Plug and Ring Gages
API Spec 5B Buttress Casing Thread Form
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