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DIN 439 B Hex Jam Nut

DIN 439 B Hex Jam Nuts have internal machine screw threads and are the same width as full-size hex nuts but are thinner—their nominal (maximum) thickness is about 0.5 times their nominal size (denoted as ~0.5d) instead of 0.8 like full-size nuts. Consequently, an M10 jam nut is 5 mm thick instead of 8 mm. While their reduced size saves space and makes them a perfect companion for small machine screws, their strength is also reduced: Class 04 and 05 for steel instead of Class 6 and higher (thin nuts are classified as Style 0 by ISO 898-2 so their Class is specified as a two-digit number with "0" as the first digit to indicate reduced loadability). Other materials include stainless steel and brass. Along with coarse thread, fine and extra fine threads can be supplied. Plain finish, susceptible to rust, and zinc plated are typical finishes for steel. Thread tolerance for plain finish and plated steel, stainless steel and brass is 6H; right-hand threads are standard. DIN 439 B Hex Jam Nuts are similar to ISO 4035, ISO 8675 and ANSI B18.2.4.5M. Never use a nut Class that doesn't match or exceed the Class of the screw. If your application requires the strength of a full-size hex nut, consider DIN 934.

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Code Product Qty. Package Qty. Carton  
NCC551-500 M1.6-0.35 Hex Jam Nut ~ 0.5d High DIN 439B, Class 04, Zinc Plated
NDK551-500 M1.6-0.35 Hex Jam Nut ~ 0.5d High DIN 439B, Brass
NCA555-500 M1.7-0.35 Hex Jam Nut ~ 0.5d High DIN 439B, Class 04, Plain Finish (no rust protection)
NCA563-500 M2-0.4 Hex Jam Nut ~ 0.5d High DIN 439B, Class 04, Plain Finish (no rust protection)
NCC563-500 M2-0.4 Hex Jam Nut ~ 0.5d High DIN 439B, Class 04, Zinc Plated
NCE563-500 M2-0.4 Hex Jam Nut ~ 0.5d High DIN 439B, Class 04, Zinc Yellow Plated
NDA563-500 M2-0.4 Hex Jam Nut ~ 0.5d High DIN 439B, A2 Stainless Steel
NDK563-500 M2-0.4 Hex Jam Nut ~ 0.5d High DIN 439B, Brass
NCA576-500 M2.5-0.45 Hex Jam Nut ~ 0.5d High DIN 439B, Class 04, Plain Finish (no rust protection)
NCC576-500 M2.5-0.45 Hex Jam Nut ~ 0.5d High DIN 439B, Class 04, Zinc Plated
NCE576-500 M2.5-0.45 Hex Jam Nut ~ 0.5d High DIN 439B, Class 04, Zinc Yellow Plated
NDA576-500 M2.5-0.45 Hex Jam Nut ~ 0.5d High DIN 439B, A2 Stainless Steel
NDK576-500 M2.5-0.45 Hex Jam Nut ~ 0.5d High DIN 439B, Brass
NCC580-500 M2.6-0.45 Hex Jam Nut ~ 0.5d High DIN 439B, Class 04, Zinc Plated
NCC586-500 M3-0.5 Hex Jam Nut ~ 0.5d High DIN 439B, Class 04, Zinc Plated
NDA586-500 M3-0.5 Hex Jam Nut ~ 0.5d High DIN 439B, A2 Stainless Steel
NDE586-500 M3-0.5 Hex Jam Nut ~ 0.5d High DIN 439B, A4 Stainless Steel
NDK586-500 M3-0.5 Hex Jam Nut ~ 0.5d High DIN 439B, Brass
NCA595-500 M3.5-0.6 Hex Jam Nut ~ 0.5d High DIN 439B, Class 04, Plain Finish (no rust protection)
NCC595-500 M3.5-0.6 Hex Jam Nut ~ 0.5d High DIN 439B, Class 04, Zinc Plated
NCE595-500 M3.5-0.6 Hex Jam Nut ~ 0.5d High DIN 439B, Class 04, Zinc Yellow Plated
NDK595-500 M3.5-0.6 Hex Jam Nut ~ 0.5d High DIN 439B, Brass
NCH601-500 M4-0.5 Fine Thread Hex Jam Nut ~ 0.5d High DIN 439B, Class 04, Zinc Plated
NCA602-500 M4-0.7 Hex Jam Nut ~ 0.5d High DIN 439B, Class 04, Plain Finish (no rust protection)
NCC602-500 M4-0.7 Hex Jam Nut ~ 0.5d High DIN 439B, Class 04, Zinc Plated

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