ZERON 100 Bolts

January 29, 2017 by · Leave a Comment 

ZERON® 100 is a highly alloyed super duplex stainless steel for use in aggressive environments. The combination of properties makes ZERON® 100 the optimum choice in a range of industries. ZERON® 100 is highly resistant to corrosion in a wide range of organic and inorganic acids. The copper content gives excellent resistance to corrosion in many non-oxidizing acids. This alloy is also highly resistant to strong alkalis. ZERON® 100 is not recommended for uses which involve extended exposure to temperatures greater than 300°C (572°F) as there is a substantial reduction in toughness.

660 Bolts

January 28, 2017 by · Leave a Comment 

Grade 660 Bolts

ASTM A453 Grade 660 covers four grades of bolting materials Classes A, B, C, and D  for use in High Strength, Heat Resistance Steel
service such as 660 bolts for pressure vessel and flanges. 

Sigma custom manufaters 660 bolting in Hex bolts, hex nuts, screws, washers, studs, and stud bolts.

L7M Bolts

January 27, 2017 by · Leave a Comment 

ASTM L7M Custom Bolts

ASTM A320 Grade L7M bolting is designned for low temperature sour gas service where there is high concertration of Hydrogen Sulfide gases present in prodcution situation. Per the specification at Sigma Fasteners we have our own heat treating furnace and hardness testing equipmet for onsite L7M modification and hardness testing. All L7M bolts require 100% hardness testing and at Sigma we keep it in house for complete control over the quality your products demand.

B7M Bolt

January 25, 2017 by · Leave a Comment 

ASTM B7M Custom Bolts

ASTM A193 Grade B7M bolting is designned for sour gas service where there is high concertration of Hydrogen Sulfide gases present in prodcution situation. Per the specification at Sigma Fasteners we have our own heat treating furnace and hardness testing equipmet for onsite B7M modification and hardness testing. All B7M bolts require 100% hardness testing and at Sigma we keep it in house for complete control over the quality your products demand.

Socket Head Cap Screws

January 22, 2017 by · Leave a Comment 

Socket Head Cap Screws

Socket Head Cap Screws

Standard and custom manufactured socket head cap screws.

Standard Socket Head Cap Screws

Sigma distributes quality fasteners – socket head cap screws, metric socket screws, flat head socket screws or button head socket screws. Also known as Allen head cap screws.

Custom and Modified Socket Head Cap Screws

If you specification requires a modified or custom socket head cap screw Sigma will deliver.

ASTM Material Selection Chart B7, B7M, L7, L7M, 660, 718 Inconel, 17-4 ph, MP35N

Available coated, plated and plain.