Description
NUT HEX NYLOCK M3X4 SST A2 DIN985 — BOLTON SKU 58903.
About the 1242377 Fastener
Part 1242377 is an M3 nylon-insert hex lock nut manufactured to DIN 985 in A2 stainless steel, as stated in the product designation. DIN 985 is the standard for prevailing-torque hexagon nuts with a non-metallic (polyamide) insert: as the mating screw thread enters the collar it forms a thread in the nylon ring, and the resulting friction resists loosening under vibration without adhesives or lock washers. Nuts of this pattern — commonly called nyloc or nylock nuts — are rated for a limited number of re-uses, because the insert deforms a little each time a thread is driven through it. The A2 marking under the ISO 3506 fastener grading system denotes general-purpose austenitic stainless steel, giving corrosion resistance for indoor and general outdoor service. Detailed dimensions and property class follow the manufacturer’s catalogue entry for this article number and can be supplied with quotation documentation on request.
Key specifications
| Type | Hex lock nut, nylon insert (prevailing torque) |
|---|---|
| Standard | DIN 985 |
| Thread | M3 |
| Material | Stainless steel, grade A2 (ISO 3506) |
| Locking element | Polyamide (nylon) insert |
| Manufacturer article | 1242377 |
Typical applications
Nylon-insert lock nuts secure bolted joints exposed to vibration in airframes, UAV structures, vehicles and industrial machinery. At M3 they are typical of avionics tray fixings, bracketry, panel hardware and small mechanism assemblies. They are standard stores hardware in MRO workshops and equipment assembly lines wherever fasteners must not back off in service.
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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