Description
NUT HEX LOCK M6 STAINLESS STEEL A2 POLYAMIDE INSERT DIN 985 BN 637 1242407 — BOLTON SKU 60221.
About the 1242407 Nylon Insert Lock Nut, M6 A2
This is an M6 prevailing-torque hexagon lock nut in A2 stainless steel, made to the familiar DIN 985 pattern and carried by Bossard under reference BN 637. A ring of polyamide is captive in the top of the nut; as the mating thread cuts into the insert it generates prevailing torque that resists self-loosening under vibration, without damaging the bolt thread. Bossard classifies BN 637 as its prevailing-torque hex lock nut, thin type, with polyamide insert, offered in A2 stainless across a range of metric sizes. DIN 985 itself has been formally withdrawn in favour of ISO-series lock-nut standards, but the designation remains in universal commercial use and parts continue to be supplied against it. A2 (304-type) stainless provides good general corrosion resistance for indoor and most outdoor service. The polyamide insert makes these nuts re-usable a limited number of times and unsuitable for sustained high-temperature joints.
Key specifications
| Type | Prevailing-torque hexagon lock nut with polyamide insert |
|---|---|
| Standard / pattern | DIN 985 (withdrawn, still in commercial use) |
| Manufacturer reference | Bossard BN 637 |
| Thread size | M6 |
| Material | Stainless steel A2 |
| Locking element | Polyamide (nylon) insert |
Typical applications
Nylon-insert lock nuts are used wherever bolted joints see vibration — vehicle and UAV structures, machinery, enclosures and general plant assembly. Stainless versions are preferred for corrosion-exposed and marine-adjacent installations and are a staple of MRO fastener stocks.
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).
Browse more in MIL-Spec & Coded Fasteners.
Reviews
There are no reviews yet.