Special alloy stud, nut & washer sets
For assemblies that specify studs, nuts and washers, the complete stack determines usable stud length and bearing dimensions. Order the components against one parts list, with the required quantities, grades, thread fits and inspection documents identified for each item.
- Set contents
- Stud + two nuts + washers
- Thread systems
- Metric · UNC · UNF · 8UN · UNJ
- Material pairing
- Component-by-component grades
- Traceability
- Heat and batch identification
- Materials
- Nickel alloys · Duplex steels · Titanium
EN 10204 3.1 MTC · Heat traceability
Stud, nut & washer sets material selection
Equipment & applications
Heat-exchanger heads
Assemble exchanger covers with studs, nuts and the washers shown on the joint drawing. Washer thickness is included in the stud projection and nut engagement calculation.
Deck equipment
Fasten deck-mounted support plates with a complete bearing stack. Washers spread contact across mounting holes while studs and nuts provide the clamping connection.
Assembly fixtures
Prepare complete clamping hardware for fixture plates. Stud length, nut height and washer footprint are matched to the plate stack and slot width.
Stud, nut & washer sets configurations & dimensions
Stud
Include both washers when calculating the clamped stack and usable stud projection. Their thickness can change the stud length needed to engage both nuts.
Nuts
Pair the nut grade, proof load and thread fit with the stud for the intended clamp load. Heavy-hex nuts also need enough radial clearance for the installation socket.
Washers
Use washers to provide the specified bearing footprint or replaceable seating surface. Bore clearance must accommodate the stud, while thickness must support the opening beneath the washer.
Dimension guide
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Product and thread standards
Raw Material Specifications
Other Materials & Specifications
Finished-Component Specifications
Other Materials & Specifications
Threads · Metric
Threads · Inch
Dimension Reference
Production & heat treatment
Studs & Mating Threads
Cut bar is prepared for full or end threading, using rolling for repeated profiles or cutting for special pitches. Usable stud length includes the washers and both nut engagements in the assembly stack.
Nut Forming & Washer Blanking
Small repeat nuts favour cold forming; large bodies and high-resistance alloys favour hot forging. Flat washers are cut or stamped from sheet or plate, then deburred so they seat against the nuts and equipment faces.
Heat Treatment & Bearing Strength
Inconel 718 components can be solution treated and aged for strength. Solution annealing restores C-276 after heavy forming. The stud, nuts and washers have different acceptance duties: tensile load, proof load and resistance to bearing deformation.
Set Assembly & Traceability
Inspection verifies thread compatibility, washer bore clearance and the complete stack dimensions. Components retain their own heat identities and are counted into the specified set quantities before packing.
Testing, MTC 3.1 & material traceability
Material certificate
Inconel 625 · historical coil-wire sample
Laboratory report
Inconel 718 · chemistry, tensile & hardness
Identified packing
Heat and batch records linked to the shipment
Additional inspection requirements +
PMI, third-party inspection and witness testing are available by order. Project inspection plans can include UT/PT and heat-treatment records.
Matching products for stud, nut & washer sets
Prepare your enquiry
- Material
- Grade / UNS · Condition
- Size
- Diameter · Length / height
- Thread
- Pitch / TPI · Form & class
- Quantity
- Pieces per size