Description
Bossard Hex Nut M3 Left-Hand Thread Stainless Steel A4 ISO 4032 — BOLTON SKU 60304.
About the Bossard Hex Nut M3 Left-Hand Thread Stainless
This Bossard Hex Nut M3 Left-Hand Thread is a hexagon nut to the ISO 4032 pattern with the non-standard feature that defines it: an M3 x 0.5 left-hand (counter-clockwise) thread. A left-hand nut tightens when turned anticlockwise, so it is used on mating left-hand threaded studs and shafts where normal rotation would progressively loosen a right-hand nut — the classic remedy for fasteners on rotating or oscillating parts, and one half of a turnbuckle-style opposed-thread adjustment. Geometry otherwise follows the standard hex nut form, with a 5.5 mm width across flats for the M3 size driven by a 5.5 mm spanner or socket. The material is A4 austenitic stainless steel, the molybdenum-alloyed 316-type acid-resistant grade suited to marine and chemically exposed service, and the nut is produced by Bossard, the Swiss industrial fastener manufacturer. Left-hand nuts are conventionally paired only with left-hand external threads; the two hands are not interchangeable.
Key specifications
| Standard pattern | ISO 4032 hexagon nut |
|---|---|
| Thread | M3 x 0.5, left-hand (counter-clockwise) |
| Width across flats | 5.5 mm |
| Material | A4 austenitic stainless steel (316 type) |
| Manufacturer | Bossard |
Typical applications
Left-hand M3 nuts secure components on shafts and spindles whose service rotation would unscrew a right-hand nut, and they form the opposing end of push-pull rod and turnbuckle adjustments in linkages and control runs. The A4 grade carries these duties into marine, wash-down and chemically exposed installations.
Supplied by BOLTON Technical Equipment Supplies against request for quotation. Add this item to your RFQ basket to request pricing, lead time and documentation requirements (e.g. CoC, datasheets or test reports where applicable).
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