Per-alloy reference sheets with downloadable PDFs.
Each alloy below maps to its governing specification (ASTM, AMS, MIL-SPEC) and is downloadable as a reference PDF for procurement, engineering, and QA use.
Reference tables for proof-load and thread geometry.
Torque is fastener-specific — verify working torque values against the engineering standards body governing the joint, the lubricant, and the assembly procedure.
Engineering guides for fastener installation.
The four stages below cover pre-installation preparation, washer selection, lubricant specification, and torque-procedure sequence. Each guide links to its underlying standards-body reference.
Surface Preparation
Bore-cleanliness, surface-condition, and torque-baseline protocols prior to fastener installation.
Open engineering guideWasher Selection
Flat washer, lock washer, and spring washer selection matched to joint geometry and vibration environment.
Open engineering guideLubrication & Anti-Seize
Thread-lubricant specification per MIL-PRF-83483 — K-factor adjustment when lubricants change from baseline dry torque.
Open engineering guideTorque Procedure
Multi-pass torque-up sequence by bolt-circle geometry — incremental stages to seating torque.
Open engineering guideConfirm the material on the shop floor.
Samples ship ahead of a formal quote so engineering and QA can verify grade, finish, and dimensional conformance.
Per-alloy specs — chemistry, service temperature, finish.
SAE J429, ASME B18.3, and ASTM F593 proof-load bands by thread class.
UNF / UNC / Metric thread-geometry and tolerance references.
Surface prep, washer selection, lubrication, torque procedure.