Value Collection HN4XX03900-005BX M39x4 Hex Nut 316 Ss

Product Description

The VALUE COLLECTION HN4XX03900-005BX is an M39 x 4 hex nut manufactured from Grade 316 Austenitic Grade A4 stainless steel with a bright, uncoated finish. Conforming to DIN 934, this nut features a right-hand thread with a 6H thread fit class, making it suitable for precision metric fastener assemblies. At 60 mm across the flats and 31 mm in height, it is sized for heavy-duty bolting applications where corrosion resistance is critical. Plumbers, pipefitters, marine contractors, and structural fabricators working with stainless fastener systems are the primary installers of this hardware.

This hex nut is intended for use in corrosive environments where Grade 316 stainless steel provides superior resistance to chlorides, acids, and oxidizing agents compared to standard 304-grade hardware. Typical applications include marine structures, chemical processing equipment, food-service installations, and coastal plumbing systems. The M39 x 4 coarse-thread profile and DIN 934 standard make it compatible with metric threaded rod, bolts, and studs of the same pitch and thread class in industrial and commercial assemblies.

Key Features

• Grade 316 Austenitic Grade A4 stainless steel for high corrosion resistance in chloride and acidic environments
• DIN 934 fastener standard ensures dimensional interchangeability with metric hardware
• M39 x 4 right-hand thread with 6H fit class for accurate, controlled thread engagement
• 60 mm across flats allows use with standard heavy-hex wrenching tools
• Bright, uncoated finish maintains base material properties without added coating thickness

Compatibility

Designed as a metric-standard replacement or new-installation hex nut for M39 x 4 threaded fastener systems conforming to DIN 934 specifications.

Installation Notes

Installation should be performed by a qualified tradesperson familiar with metric fastener systems and applicable torque standards for the specific assembly. Ensure the mating bolt or threaded rod is also Grade 316 stainless or a compatible alloy to prevent galvanic corrosion. Lubricate threads with an anti-seize compound rated for stainless steel to reduce galling during tightening. Never use a nut that shows signs of thread damage, distortion, or contamination before installation.