Custom 304 Stainless Steel Spider Caps

Custom 304 Stainless Steel Spider Caps

JG manufactures Custom 304 Stainless Steel Spider Caps as a matched two-piece precision assembly for OEM industrial equipment. Machined from solid AISI 304 stainless steel, the upper and lower blocks combine accurately aligned mounting holes, deep UNF threads and a symmetrical formed seat. The design requires coordinated machining of both halves so that the complete assembly closes evenly and maintains consistent clamping geometry.

Product Overview

The Custom 304 Stainless Steel Spider Caps are produced to drawing 16SG-7-B19. Each assembly consists of two nominal 2 x 3-1/4 x 5 inch stainless steel blocks. The finished pair incorporates four fastening positions and a central profile with 135-degree transitions, 1/4 inch typical radii and a controlled 7/16 inch profile height.

Manufacturing Process

1. 304 stainless steel block preparation and material verification
2. Datum establishment and precision CNC face milling
3. CNC rough and finish milling of the central stepped groove
4. Coordinated drilling of four holes through the matched upper block
5. Tap-drilling and 5/8-18 UNF thread machining in the lower block
6. Edge breaking, deburring and internal thread cleaning
7. Matched-pair dimensional and visual inspection
8. Protective cleaning and export packaging

Matched Two-Piece Hole Alignment

A major manufacturing challenge of the Custom 304 Stainless Steel Spider Caps is maintaining the four-hole pattern across both components. The top block uses 11/16 inch clearance holes, while the lower block uses 37/64 inch tap-drilled holes with 5/8-18 UNF threads to a specified depth of 1-1/8 inches. Common datums and coordinated setups help each bolt enter smoothly without forcing or cross-threading during assembly.

Controlled 135-Degree Groove Geometry

The central seating profile distinguishes the Custom 304 Stainless Steel Spider Caps from conventional rectangular clamping blocks. Both 135-degree transition faces must remain symmetrical about the centerline, blend into the specified 1/4 inch radii and hold the required profile height. Stable workholding and controlled finishing passes reduce mismatch, tool marks and local distortion.

Technical Specifications

Thread and Surface Quality Control

Every Custom 304 Stainless Steel Spider Caps assembly is checked for hole position, drill size, thread engagement, overall dimensions and profile conformity. Go/no-go thread gauges verify the 5/8-18 UNF threads. Machined faces are inspected for burrs, sharp edges, contamination and handling damage, while the matched components are protected from mixing during cleaning and packing.

Product Features

• Corrosion-resistant AISI 304 stainless steel construction
• Matched two-piece CNC-machined assembly
• Accurate four-hole alignment across both blocks
• Deep 5/8-18 UNF internal threads
• Symmetrical 135-degree central seating profile
• Burr-free holes, threads and machined edges
• Material traceability and dimensional reports available
• OEM production according to customer drawings

Applications

• Industrial clamping and support assemblies
• Custom machinery fixtures
• Stainless steel equipment and tooling
• OEM mechanical assemblies requiring matched caps
• Corrosion-resistant production equipment

OEM Stainless Steel Machining from JG

JG supplies Custom 304 Stainless Steel Spider Caps from prototype quantities through repeat production. Our engineering team controls material identification, paired-part datums, groove geometry, threaded-hole alignment and final inspection throughout the CNC machining process. Customers can request material certificates, dimensional inspection reports and full drawing-based manufacturing support.