Simmonds Marshall Limited

We can supply a wide range of Bolts from our associated Companies. We supply forged fasteners that incorporate all the secondary operations involved, such as Turning, Grooving, Slotting, Knurling, Milling, Chamfering, Drilling, and Pointing. PRODUCT RANGE Description Diameter Length Standards Grade Forging Finish Hex HeadBolt/Sc M6 - M70 12MM to 300MM DIN, IS, BS, ISO, ASME 4.6, 6.8, 8.8, 10.9, 12.9 Cold / Hot Zn, Phos Flange Bolt/Sc M5 - M24 12 mm to 300 mm DIN, IS, BS, ISO, ASME 4.6, 6.8, 8.8, 10.9, 12.9 Cold / Hot Zn, Phos Socket Countersunk Head Screw M6 - M48 10mm to 300 mm DIN, IS, BS, ISO, ASME 4.6, 6.8, 8.8, 10.9, 12.9 Cold / Hot Zn, Phos Socket Head Cap Screw M5 - M48 15mm- 75mm DIN, IS, BS, ISO, ASME 8.8, 10.9, 12.9 Cold / Hot Zn, Blk, Phos Studs M10 - M30 50mm- 200mm ASTM A193 B7 Cold / Hot Zn, Blk

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. PRODUCT RANGE : Size Range : M6 Finishes Available : Bright Zinc, Zinc Blue, Zinc Yellow, Zinc Black, Zinc Green. Hexavalent or Trivalent chrome

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. PRODUCT RANGE : CASTLE 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 Thread Form : British / Unified / Metric Size Range : " to 2 Finishes Available : Bright Zinc, Zinc Blue, Zinc Yellow, Zinc Black. Hexavalent or Trivalent chrome.

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. PRODUCT RANGE Size Range : M5 to M33 (Metric Series) 1/4" to 1 1/4" (British/Unified Series) Finishes Available : Bright Zinc, Zinc Blue, Zinc Yellow, Zinc Black, Zinc Green. Hexavalent or Trivalent chrome. CLEVELOC NUTS withstand shocks, vibration and repeated load reversals. They are unaffected by immersion in oil, boiling water and a wide variety of solvents and corrosives, and by temperatures ranging from -70'C to +250'C. For speedy and improved assembly, with reduced costs. CLEVELOC FEATURES Rugged-Economic-One-Piece Nuts : Precision formed and processed on special-purpose plant for competitive costs. 

The 320 ton Maypress are capable of cold forging small and shallow components for the automobile manufacturers and their ancillaries. These are manufactured out of special steels and accuracy and finish as per customer requirements can be maintained by cold forging. The solid material flows plastically by the application of intensive pressure over its surface area and can form components of various configurations as required. Our presses can coin, extrude, upset, size, fine stamp, bend, draw and form . Thus our presses are capable to manufacture components, for bearing, chains, bicycles & electrical equipment industries besides automobile Industry. SIZE RANGE : Various configurations up to 45 Dia, weighing from 40 to 250 gms.

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. PRODUCT RANGE : Specification : As per customer design and finish. Size Range : M 12 to M 22 Finishes Available : Bright Zinc, Zinc Blue, Zinc Yellow, Zinc Black. Hexavalent or Trivalent chrome.

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.

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 : As per customer design and finish. Size Range : Metric Series ( M6 to M16 ) and British / Unified Series (1/ 2" To 7/ 8 ) Finishes Available : Bright Zinc, Zinc Blue, Zinc Yellow, Zinc Black. Hexavalent or Trivalent chrome.

THE NYLOC PRINCIPLE 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. PRODUCT RANGE PRODUCT RANGE : Specification : Din 982 / 985, BS 1083, BS 1768 Thread Form : Coarse / Fine BSW / BSF UNC / UNF / Metric Size Range : 1/4" to 2" Finishes Available : Bright Zinc, Zinc Blue, Zinc Yellow, Zinc Green. Hexavalent or Trivalent chrome TECHNICAL ADVANTAGES OF NYLOC SELF-LOCKING NUTS The technical factors which summarise the main advantages of Nyloc self-locking nuts are : Single unit assembly : The nut and its insert form a single unit pre-assembled in the factory. Infinite adjustment : The nut can be positioned and locked at any desired torque loading. Interchangeable : Equally effective on high or low limit bolts. Nyloc can be safely changed over during routine maintenance and overhaul. Exact adjustment : The nut remains positioned in any set position along the bolt thread. Predictable tightening torques : The even torque pattern makes it possible to calculate.

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 : Size Range : Metric M 6 to M 20 Finishes Available : Bright zinc, Zinc blue, Zinc yellow, Zinc Black. Hexavalent or Trivalent chrome.

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 Specifications : Metric JIS Size Range : M 5 to M 10 HEXAGON Specifications : DIN 929 Thread : Metric / Unified Size Range : M 5 to M 10

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 (British / Unified)