SIMMONDS MARSHALL LIMITED Fort, Mumbai, Maharashtra

1. COLLAR WHEEL NUTS 2. TAPERED WHEEL NUTS 3. ASSEMBLY WHEEL NUTS 4. DOME CAP WHEEL NUTS 5. NYLOC WHEEL NUTS These nuts are manufactured for heavy and light commercial vehicles, Cars, Tractors and Two Wheelers as per vehicle manufacturers’ specifications. These nuts serve the useful purpose of securing the wheels and are approved not only by the vehicle manufacturers but also by Automotive Research Association of India.   PRODUCT RANGE : Specification : As per manufacturer’s design and specification. Size Range : above M10(Metric) & above ½ “(British / Unified) Finishes Available :

Weld nuts are projection welded directly on the sheet metal parts to be assembled. These nuts permit Blind Assembly and other components. Thus it can be applied in High Speed production methods on Automatic Welding Machines.   PRODUCT RANGE : SQUARE Specification :  Metric JIS Size Range :  M 5 to M 10 Finishes Available :    HEXAGON Specification :  DIN 929 Thread :  Metric / Unified Size Range :  M 5 to M 10

These Self Locking nuts having metal inserts, either made of carbon steel or stainless steel which run over the thread of the mating component generating the self locking effect.   PRODUCT RANGE : Specification :  Customer Prints Size Range :  M5 to M22 (Metric Series) Finishes Available :  Bright zinc, Zinc blue, Zinc yellow, Zinc Black. Hexavalent or Trivalent chrome. Characteristics : Locking Element (Friction Ring) –Special Stainless Steel Ring Superior Locking High Re-usability Uniform Performance Being All Metal Product, the Nuts are Highly Resistant to Heat and Cold (-70° C to +250° C)

These Self Locking nuts having metal inserts, either made of carbon steel or stainless steel which run over the thread of the mating component generating the self locking effect.

1. These nuts incorporate a special moulded Nylon Insert, the internal diameter of which is smaller by a predetermined degree than the bolt thread. 2. The tightening of the bolt forces the leading threads of the bolt into the Nylon insert which yields under this pressure to form a thread. 3. Due to the resistance applied by the nylon insert the working sides of the nut and bolt threads are in close contact and create friction. “Friction” which builds up, is maintained on the entire length of the sides of the nut and bolt threads which normally carry the load when the nut is fully tightened. 4. The Nyloc nut is locked and made completely vibration proof by two independent forces : a) The close contact and friction set up and maintained between the entire length of the working face of the threads, due to the encircling “Wedge” effect of the Nylon insert. b) The Nylon insert being highly compressed “grips” the bolt threads with a sustained and considerable inward pressure.

There are no thread interruptions or pitch errors to react unfavourably or to induce galling on the bolt threads. The two locking elements utilize most of the collar portion of the nut and the threads that come within its depth. The elliptical form of the locking collar with its distribution over wide areas of the locking pressure, ensures a high fatigue life with necessary flexibility to give consistent performance and dependability in service. These locking elements are designed to create gradually increasing areas of pressure and friction on the bolt threads.

These nuts are used for rigid metal and flexible hose pipes used in fuel and hydraulic lines. The internal critical dimensions are maintained to ensure reliable and leak proof joints.    

FLANGE NUTS – PLAIN & SERRATED The necessity of using a washer is eliminated as the bearing surface of the face of the nut is larger thereby effecting a stronger grip. Serrated Nuts are used to reduce the loosening effect as whilst tightening these nuts force a grip on the mating component.   PRODUCT RANGE : Specification : DIN 6923 / CUSTOMER STANDARDS Thread form : Metric British / Unified sizes Size Range :  M6 to M16 Finishes Available : Bright Zinc, Zinc Blue, Zinc Yellow, Zinc Black. Hexavalent or Trivalent chrome.

DOME NUTS – ONE PIECE CONSTRUCTION These are either Nyloc Self-Locking or Plain nuts. With metal caps they provide a leak-proof seal, which protects the bolt ends and prevent protruding bolt threads from causing any damage. They also act as an elegant decorative fastener, which enhances appearance.   PRODUCT RANGE : Specification : Customer Prints Size Range : Metric Series ( M6 to M25 ) and Unified / Imperial Series (1/2″ To 7/8” ) Finishes Available : Bright Zinc, Zinc Blue, Zinc Yellow, Zinc Black. Hexavalent or Trivalent chrome. Characteristics : Formed or Cut threads Leak Proof Seal Enhances Appearance

Endeavouring to save on natural resources, various components have been developed which are hither to manufactured through machining route with the new range of 6 station PKO Cold Formers. Symmetrical components in round, square and hexagon shape with or without collar (flange) and threads are now cold forged with close tolerances and high productivity. These components are well accepted and appreciated by OE manufacturers due to great cost saving potentials besides fulfilling their high volume demands.   PRODUCT RANGE : Specification : As per customer Designs Size Range : Diameter – 5mm – 34mm ,  Collar Dia: 42mm max,  Length: 6mm – 40mm Finishes Available : Zinc, Zinc Alkali, Zinc Nickel, Dacro Yellow, Clear, black, green passivation in trivalent & hexavalent.

The Cleveloc nut is a low cost one-piece self-locking nut with superior locking and re-usability characteristics. The locking collar is an integral part of the nut and is formed into a geometrically developed ellipse. This provides two locking elements of consistently uniform shape and thread contour which permit the bolt threads to engage smoothly during assembly. There are no thread interruptions or pitch errors to react unfavourably or to induce galling on the bolt threads. The two locking elements utilize most of the collar portion of the nut and the threads that come within its depth. The elliptical form of the locking collar with its distribution over wide areas of the locking pressure, ensures a high fatigue life with necessary flexibility to give consistent performance and dependability in service. These locking elements are designed to create gradually increasing areas of pressure and friction on the bolt threads. Further tightening forces the locking elements to engage more fully with the bolt threads and this increasing resistance to the entry of the bolt brings the full length of the nut threads into close contact with the working faces of the bolt threads. Further friction is created and both forces combine to give a smooth, progressive and increasing self-locking action.

They are another form of Lock Nuts used where there is vibration in application and possibility of loosening exists. They are locked by the use of a cotter pin in a pre-determined hole in the mating bolt.   Specification :  DIN 935 / 937 Thread Form : Metric Size Range : M12 To M48 Finishes Available : Bright Zinc, Zinc Blue, Zinc Yellow, Zinc Black, Zinc Green. Hexavalent or Trivalent chrome.   SLOTTED Specification: Thread Form :  British / Unified / Metric Size Range :  ½ ” to 2 “ Finishes Available : Bright Zinc, Zinc Blue, Zinc Yellow, Zinc Black. Hexavalent or Trivalent chrome.

A Nyloc Self Locking Nut is inserted in a clip which is used for bolting for component to a panel edge which has no guide holes.   Specification: Size Range : M6 Finishes Available : Bright Zinc, Zinc Blue, Zinc Yellow, Zinc Black, Zinc Green. Hexavalent or Trivalent chrome