Industrial fastener supplier Gauteng Bambalela Bolts

By: Bambalela  11-11-2011
Keywords: Fasteners, Nuts, mild steel

The stocked items include a full range of fasteners, and fastener-related products in various materials, and grades of steel, amounting to in excess of 8 000 line items.

  • stainless steel fasteners (Grade 304 and 316);

  • hexagon socket head cap screws;

  • high tensile steel bolts (Din 931/933 Grade 8.8, 10.9, 12.9);

  • mild steel bolts (Din 558/601 Grade 4.8);

  • high tensile and mild steel set screws (Din 931/933 Grade 8.8, 10.9, 12.9);

  • high tensile and mild steel nuts;

  • nyloc nuts, Cleveloc nuts and half-lock nuts;

  • flat washers and taper washers;

  • spring washers and car body washers;

  • star-lock washers;

  • stainless and carbon steel threaded rods;

  • full range of Din 960 and Din 961 fine pitch grade 8.8 bolts, sets and nuts;

  • Special bolts as large as M56 x 400 mm;

  • Large nuts up to M72 straight off the shelf;

  • Cheese head, Countersunk, Pan Pozi and Pan Combi zinc plated machine
    screws;

  • Foundation Bolts, U-Bolts, Hook bolts and J-Bolts made to your requested
    sizes.

TERMINOLOGY

PRODUCT INFO:

BOLTS VS SETS

DIN 931 Hexagon Bolt is partially threaded. It is measured from underneath the head to the end of the bolt.


DIN 933 Hexagon Set Screw is a bolt that is fully threaded. It is measured from underneath the head to the end of the bolt.

T.P.I. and PITCH OF THREADS

T.P.I (Threads Per Inch)is used to measuring the thread if Imperial bolts while PITCH is used for measuring thread of Metric bolts.

T.P.I = 3 if the distance below = 1 inch

PITCH = distance from top of one thread to top of next thread

HOW TO CALCULATE THREAD LENGTH

METRIC

To calculate thread length of any type of METRIC BOLT the following formula is used:

2x diameter +6 for up to 125mm long

2x diameter +12 for 125mm to 200mm long

2x diameter +25 for more than 200mm long

e.g. bolt M30 X 180 long = 30 x 2 + 12 = 72mm therefore standard thread length = 72mm

IMPERIAL

To calculate thread length of any type of IMPERIAL BOLT the following formula is used:

2x diameter + 1/4 for up to 6"

2x diameter + 1/2 for over 6"

e.g. imperial bolt 1/2" x 5" thread length = 2x 1/2" = 1 + 1/4 = 1.1/4

Therefore the standard thread length = 1.1/4

NUTS

A wide variety of nuts are manufactured world wide.

HEXAGON NUTS

The Hex nut is a full nut and is the standard nut used in the fastener industry. It is supplied in a variety of materials.

DIN 555 material mild steel 4.8

   

DIN 934 material HI-Tensile 8.8 Metric fine

 

DIN 934 material HI-Tensile 8.8

   

Keywords: Bolts, Fasteners, High Tensile Steel Bolts, mild steel, Nuts, Stainless steel Fasteners,