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Carbon Steel Flange Lock Nut

We manufacturer fasteners with size range from M10 to M100  Hex Nuts, Heavy Hex Nut, Cap Nut, Acorn Nut, Serrated Flange Nut, Coupling Nut, Square Nut, Castle Nut, Wing Nut, Flange Lock Nut, Flex Lock Nut, High Nut, Kep Nut, Jam Nut, Nylon Lock Nut, Slotted Nut, Reversible Lock Nut, Custom Nut, T Nuts & other customized Nuts as per Client's requirement.We produce Hot Forged and Coled Formed Nuts Fasteners.

Scope

The ASTM A194 specification covers carbon, alloy and stainless steel nuts intended for use in high-pressure and/or high-temperature service. Unless otherwise specified, the American National Standard Heavy Hex Series (ANSI B 18.2.2) shall be used. Nuts up to and including 1 inch nominal size shall be UNC Series Class  2B fit. Nuts over 1 inch nominal size shall be either UNC Series Class 2B fit or 8 UN Series Class 2B fit. High strength ASTM A194 grade 2H nuts are common in the marketplace and are often substituted for ASTM A563 grade DH nuts due to the limited availability of DH nuts in certain diameters and finishes.

A194 Grades

2Carbon steel nuts
2HQuenched & tempered carbon steel nuts
2HMQuenched & tempered carbon steel nuts, 100% hardness tested
4Quenched & tempered carbon-molybdenum nuts
7Quenched & tempered alloy steel nuts
7MQuenched & tempered alloy steel nuts, 100% hardness tested
7LQuenched & tempered alloy steel nuts, Charpy impact tested
8Stainless AISI 304 nuts
8MStainless AISI 316 nuts

A194 Mechanical Properties

Grade Identification Marking5 Specification Material Nominal Size, In. Tempering Temp. °F Proof Load Stress, ksi Hardness Rockwell See Note
Min Max
2ASTM A194 Grade 2Medium Carbon Steel1/4 - 401501593521,2,3
2HASTM A194 Grade 2HMedium Carbon Steel, Quenched and Tempered1/4 - 4850175C24C381,2
2HMASTM A194 Grade 2HMMedium Carbon Steel, Quenched and Tempered1/4 - 411501501592371,2,3
4ASTM A194 Grade 4Medium Carbon Alloy Steel, Quenched and Tempered1/4 - 41100175C24C381,2
7ASTM A194 Grade 7Medium Carbon Alloy Steel, Quenched and Tempered1/4 - 41100175C24C381,2
7MASTM A194 Grade 7MMedium Carbon Alloy Steel, Quenched and Tempered1/4 - 411501501592371,2,3
8ASTM A194 Grade 8Stainless AISI 3041/4 - 4-801263004
8MASTM A194 Grade 8MStainless AISI 3161/4 - 4-801263004
NOTES:
  1. The markings shown for all grades of A194 nuts are for cold formed and hot forged nuts. When nuts are machined from bar stock, the nut must additionally be marked with the letter 'B'. The letters H and M indicate heat treated nuts.
  2. Properties shown are those of coarse and 8-pitch thread nuts.
  3. Hardness numbers are Brinell Hardness.
  4. Nuts that are carbide-solution treated require additional letter A - 8A or 8MA.
  5. All nuts shall bear the manufacturer’s identification mark. Nuts shall be legibly marked on one face to indicate the grade and process of the manufacturer. Marking of wrench flats or bearing surfaces is not permitted unless agreed upon between manufacturer and purchaser. Nuts coated with zinc have an asterisk (*) marked after the grade symbol. Nuts coated with cadmium shall have a plus sign (+) marked after the grade symbol.
  6. Other less common grades exist, but are not listed here.

A194 Chemical Properties

Element 2, 2H, and 2HM 4 7 and 7M (AISI 4140) 8 (AISI 304) 8M (AISI 316)
Carbon0.40% min0.40 - 0.50%0.37 - 0.49%0.08% max0.08% max
Manganese1.00% max0.70 - 0.90%0.65 - 1.10%2.00% max2.00% max
Phosphorus, max0.040%0.035%0.035%0.045%0.045%
Sulfur, max0.050%0.040%0.040%0.030%0.030%
Silicon0.40% max0.15 - 0.35%0.15 - 0.35%1.00% max1.00% max
Chromium0.75 - 1.20%18.0 - 20.0%16.0 - 18.0%
Nickel8.0 - 11.0%10.0 - 14.0%
Molybdenum0.20 - 0.30%0.15 - 0.25%2.00 - 3.00%

 

Nut Type

Hex NutsHeavy Hex NutCap NutAcorn NutSerrated Flange Nut
Coupling NutSquare NutCastle NutWing NutFlange Lock Nut
Flex Lock NutHigh NutKep NutJam NutNylon Lock Nut
Slotted NutReversible Lock NutCustom NutT Nuts 

 

Carbon Steel Flange Lock Nut Application Industries

Sunflex Metal Industries are engaged in manufacturing of robust quality of Carbon Steel Flange Lock Nut. These Carbon Steel Flange Lock Nut are widely used in the following industries:

Carbon Steel Flange Lock Nut Mining Industries
Carbon Steel Flange Lock Nut Transport Industries- Rail and Road
Carbon Steel Flange Lock Nut Construction Industries / Building Systems
Carbon Steel Flange Lock Nut Manufacturing Industries
Carbon Steel Flange Lock Nut Agriculture Industries
Carbon Steel Flange Lock Nut Energy Industries
Carbon Steel Flange Lock Nut Water Industries
Carbon Steel Flange Lock Nut Automotive Industries
Carbon Steel Flange Lock Nut Ship Building Industries
Carbon Steel Flange Lock Nut Nuclear Power Plant
Carbon Steel Flange Lock Nut Paper & Pulp Industries
Carbon Steel Flange Lock Nut Sugar Industries
Carbon Steel Flange Lock Nut Engineering Cement Industries
Carbon Steel Flange Lock Nut Petro-Chemical Industries
Carbon Steel Flange Lock Nut Food Industries
Carbon Steel Flange Lock Nut Oil & Gas Industries
Carbon Steel Flange Lock Nut Chemical & Pharmaceutical Industries

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