For Domestic (for India) Email: / Phone: +91 9833323564 / +91-22-6639 3672
For Export (for other than India) Email: / Phone: +91-9833323751 / +91-22-23634937
JF Engineering Products LLP

Heavy Hex Jam Nut Fasteners – ASTM A193/A194

ASTM A182/A307 Stainless Steel 304/304H/304L Heavy Hex Jam Nut Fasteners, ASTM A182 SS 316/316Ti Heavy Hex Jam Nut Fasteners, ASTM A193 SS 317/317L/321 Heavy Hex Jam Nut, Carbon Steel ASTM A194 B6/B7 Heavy Hex Jam Nut Fasteners, Alloy Steel ASTM A320 L7/L7A/L7B Heavy Hex Jam Nut Fasteners, Copper 110 Heavy Hex Jam Nut, Duplex steel S31803/ S32205 Heavy Hex Jam Nut fastener, Hastelloy C22/C276/B2 Heavy Hex Jam Nut, Incoloy 800/800H/800HT Heavy Hex Jam Nut Fasteners, Inconel 600/601 Heavy Hex Jam Nut, Monel 400/K500 Heavy Hex Jam Nut

Heavy Hex Jam Nuts are slightly larger and thicker than finished hex nuts. There are numerous grades and the heavy pattern is typically used for large diameter and high strength bolts. These nuts offer adequate strength for many applications but this nut style does not work in some condition as it does not provide a “One Size fits all” solution. JF Engineering offers the best solution in supplying the variety of heavy hex Jam nut having varieties of features:

  • Diameters: 3/8" - 2-3/4"
  • Grades: A563 (grades A, C, and DH), A194 grade 2H
  • Standards: ISO 4035,8675DIN 439b, IS 1364(part 4), JIS B1181
  • Mechanical Properties: cl. 6,8,As Per Customer Specifications
  • Surface Treatment: As Per Customer Specifications

If you are using the proper combination of fasteners that allows the reliable design even under heavy loads and extreme conditions.


- Diameters: 3/8" - 2-3/4"
- Grades: A563 (grades A, C, and DH), A194 grade 2H
- Standards: ISO 4035,8675DIN 439b, IS 1364(part 4), JIS B1181
- Mechanical Properties: cl. 6,8,As Per Customer Specifications
- Surface Treatment: As Per Customer Specifications

Technical Specification
Range Size M3 - M48 and also available in all customized sizes.
Material(All Grade) Stainless Steel
Grade: ASTM 182 , ASTM 193, ASTM 194, B8 (304), B8C (SS347), B8M (SS316), B8T (SS321), A2, A4, 304 / 304L / 304H, 310, 310S, 316 / 316L / 316H / 316 Ti, 317 / 317L, 321 / 321H, A193 B8T 347 / 347 H, 431, 410
Carbon Steel
Grade: ASTM 193, ASTM 194, B6, B7/ B7M, B16, 2, 2HM, 2H, Gr6, B7, B7M
Alloy Steel
Grade: ASTM 320 L7, L7A, L7B, L7C, L70, L71, L72, L73
Grade: C270000
Naval Brass
Grade: C46200, C46400
Grade: 110
Duplex & Super Duplex
Grade: S31803, S32205
Grade: C61300, C61400, C63000, C64200
Grade: Hastalloy B2, Hastalloy B3, Hastalloy C22, Hastalloy C276, Hastalloy X
Grade: Incoloy 800, Inconel 800H, 800HT
Grade: Inconel 600, Inconel 601, Inconel 625, Inconel 718
Grade: Monel 400, Monel K500, Monel R-405
High Tensile Bolt
Grade: 9.8, 12.9, 10.9, 19.9.3
Grade: 710, 715
Nickel Alloy
Grade: UNS 2200 (Nickel 200) / UNS 2201 (Nickel 201), UNS 4400 (Monel 400), UNS 8825 (Inconel 825), UNS 6600 (Inconel 600) / UNS 6601 (Inconel 601), UNS 6625 (Inconel 625),UNS 10276 (Hastelloy C 276), UNS 8020 (Alloy 20 / 20 CB 3)
Surface Finish Blackening, Cadmium zinc plated, Galvanized, Hot dip Galvanized, Nickel Plated, Buffing, etc.
Application All Industry
Die forging Closed die forging, open die forging, and hand forging.
Threads Metric, BSW, BSF, UNC, UNF, and as per costumers requirement.

Marking and Packing

Products are packaged to ensure that there is no damage during transit. In case of exports, standard export packaging is done in wooden cases. All pipes are marked with Grade, Lot No, Size, Degree and our trade mark. On special requests we can also, make custom marking on our products.

Quality Assurance

At JF Engineering Products LLP, all fasteners are subject to strict inspection at each stage of the production process, from starting material purchasing to product dispatch. They are visually examined for conformity to ASTM, ASME, MSS, DIN, EN, and JIS codes and standards. Upon request, official certified Inspection Agencies can be called in to witness the material reports, dimensions and quality conformity of products.

Test Certificates

Manufacturer Test Certificate as per EN 10204 / 3.1B, Raw Materials Certificate, 100% Radiography Test Report, Third Party Inspection Report

Shipping Policy

Delivery time and delivery dates are based on the "type and quantity" of steel ordered. Our sales team will provide a delivery schedule when quoting to you. On rare occasions the delivery schedule may change so please check with our sales department when placing any orders.

Orders will be sent out within 2-3 business days, and may take up to 5-10 business days in transit. If fastener is out of stock, orders may take up to 2-4 weeks to ship. JF Engineering Products LLP will notify buyer if this situation occurs..

Uses & Application

JF Engineering Products LLP take immensure pleasure in introducing itself as one of the leading Manufacturer & Exporter of high quality fasteners to meet the customer ultimate requirements in the fields of:

Chemical Oil Mills Petrochemical Mining Refineries Construction
Fertilizers Shipbuilding Power Plant Steel Plant Nuclear Power Offshore
Oil & Gas Defence Paper Ports Breweries Railway
Cement Engineering Co. Sugar & Government Org. etc.

Our Products