Square Head Machine Bolts

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304L Stainless Steel Square Head Machine Bolts, 316 Stainless Steel Square Head Machine Bolts, Duplex 2205 Square Head Machine Bolts , Duplex 2507 Square Head Machine Bolts,347 Stainless Steel Square Head Machine Bolts,Titanium Grade 5 Square Head Machine Bolts , 317L Stainless Steel Square Head Machine Bolts, 321 Stainless Steel Square Head Machine Bolts


About Head Machine Bolts

Square-head Machine bolts are utilized for fastening rod line equipment and lineup construction specialization services and products to both cross arm sticks as well as other constructions in addition to attaching the wood cross arms into the rod. Square-head system bolts possess an extra semi-cone stage along with also a ribbon span exceptional to rod lineup attachments based upon your ion span. Square headset system bolts also have a nut constructed.

The industry standard before hex bolts gained prominence was the square head machine bolts. The most common use for aesthetic now is to provide a rustic appearance in a new structure or to match existing attachments in an older structure  For these purposes, square lag screws are also used. Crossarm or machine bolts are frequently delivered to the utilities industry with an additional cone point.

Square Head Machine Bolts

316L Stainless Steel Square Head Machine Bolts, Step Bolts, Silicon Bronze 651 Square Head Machine Bolts , Duplex S31803 Square Head Machine Bolts, Titanium Grade 2 Square Head Machine Bolts , 304H Stainless Steel Square Head Machine Bolts, Ferralium 255 FG46 Square Head Machine Bolts

Information of Head Machine Bolts


DIN, ASTM, BS and all International Standards


+/-0.01mm to +/-0.05mm


3 mm to 200 mm |Custom Sizes


5 Pices


M3 - M56 | 3/6" to 12" | Custom Sizes

Special Grade

Stainless Steel 310 ,316,317,347


canton, pallet, Small Boxs / carton / pallet, or customer request

Top Manufacturers

SPAX® Screws, GKW, Unbrako, Kundan, APL, Sundaram Precision, Infasco, EBY Fastener Etc.

Head Machine Bolts Dimensions

Square Head Bolts Metric Coarse
Square Head Bolts UNC

Standard Thread Lengths

  • Bolt lengths < 6″: Thread length = (2 X diameter) 1/4″
  • Bolt lengths > 6″: Thread length = (2 X diameter) 1/2″

* ASME only defines head dimensions up to 1-1/2″. Dimensions for 1-3/4 and 2″ are approximate and not covered under the ASME dimensional specifications.

Dimensions per ASME B18.2.1 1996

Head Machine Bolts Specification


Boxes and Crates Shrink-wrapped
Carton boxes Wooden pallets
Wooden boxes Wooden crates
Testings (Destructive, Non Destructive)
Application Industries

Delivery Available

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