Hex & Lock Nuts Supplier

Nuts

Bayou City Bolt carries a complete line of Hex Nuts and Heavy Hex Nuts. These nuts are available in both US Standard and Metric. 2H and A325 Heavy Structural Nuts are stocked as well. In addition, we also stock specialty nuts, such as Castle, Coupling and Eye Nuts.

  • Acme Nut
  • Acorn Nut
  • Allen Nut
  • Cage Nut
  • Cap Nut
  • Castle Nut
  • Coupling Nut
  • Eye Nut
  • Flange Nut
  • Hex Nut
  • Hi Nut
  • Left Hand Thread Nut
  • Slotted Nut
  • Square Nut
  • Tee Nut
  • Wing Nut

Locknuts

Bayou City Bolt carries a variety of Lock Nuts. These nuts are available in both US Standard and Metric. In addition to the standard Nylon Insert Locknuts, interference locknuts such as Type-C and Stover are in stock. We also carry Flexlock nuts in thin and full height.

  • Anco Lock Nuts
  • Flexlock Nuts
  • Nylon Insert Locknuts
  • Type C Locknuts
  • Two Way Locknuts
  • Stover Locknuts

 

A nut is a type of fastener with a threaded hole. Nuts are almost always used opposite a mating bolt to fasten parts together. The two components work together by a combination of friction between the threads, a slight stretch of the bolt, and compression of the mating parts.

Nuts are graded with strength ratings compatible with their respective bolts; for example, an ISO property class 10 nut will be able to support the bolt proof strength load of an ISO property class 10.9 bolt without stripping. Likewise, an SAE class 5 nut can support the proof load of an SAE Grade 5 bolt, and so on. Typically hex nuts proof load should be matched with the mating hex bolts tensile strength.

A nylon insert lock nut is a kind of nut that includes a nylon collar insert. The insert is placed at the end of the nut and its inner diameter (ID) is slightly smaller than the major diameter of the screw. The insert deforms elastically over the threads of the screw, but threads are not cut into the nylon. The nylon insert locks the nut in two ways. It forces the bottom face of the screw threads against the top face of the nut threads, increasing the friction between the two, and applies a compressive force against the screw itself.

Heavy hex nuts are slightly larger and thicker than finish hex nuts. There are numerous grades and the heavy pattern is typically used for large diameter and high strength bolts.

SpecificationMaterialNominal SizeProof Load Stress psiHardness Rockwell Min/MaxGrade Identification Marking
ASTM A563 Grade A Carbon Steel 1/4 - 4 90000 B68/C32 Grade Identification Markings for Nuts
ASTM A563 Grade A Heavy Carbon Steel 1 - 4 100,000 B68/C32 Grade Identification Markings for Nuts
ASTM A563 Grade C Heavy Carbon Steel May be Quenched and Tempered 1/4 - 4 144,000 B78/C38 Grade Identification Markings for Nuts
ASTM A563 GRADE DH HEAVY HEX Carbon Steel Quenched and Tempered 1 /4 - 4 175,000 C24/C38 Grade Identification Markings for Nuts
ASTM A194 GRADE 2H HEAVY HEX Medium Carbon Steel 1/4 - 1 1/2 175,000 C24/C35 Grade Identification Markings for Nuts
ASTM A194 GRADE 2HM HEAVY HEX Medium Carbon Steel Quenched and Tempered 1/4 - 1 1/2     Grade Identification Markings for Nuts

We offer the lowest minimums in the industry, and sell by the piece or in
bulk - you buy only the fasteners you need!

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