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COUNTERSUNK WASHERS

Quick Overview

The countersunk style is designed to be used with flat-head screws. A washer is a thin plate with a hole that is normally used to distribute the load of a threaded fastener, such as a screw or nut. Stainless Steel - With the addition of 12% chromium to iron, stainless steel is formed. The chromium protects the iron against most corrosion or red-colored rust; thus the term "stainless" steel. The ability of stainless to form a thin layer of protection on its outside surface, called a "passive film" is its most important characteristic in preventing corrosion. "18-8" - 300 series stainless steel having approximately 18% chromium and 8% nickel. The term "18- 8" is used interchangeably to characterize fasteners made of 302,303,304,305 and other variables of these grades with close chemical compositions. There is little overall difference in corrosion resistance between the 18-8 types. 18-8 has superior corrosion resistance in comparison to 400 series stainless, and is generally non-magnetic. Bulk material handling equipments can provide Cold Forged & Hot Forged Countersunk Washers/Non Standard Special Countersunk Washers with complete material compliance as both Metric & Imperial Inch sizes. Types of coating for countersunk washers/non standard special countersunk washers that can be offered are electro zinc plating, hot dip galvanizing, ptfe fluorocarbon coating, aluminizing, ceramic filled fluorocarbon coating, nickel plating, zinc coating, electro zinc cobalt plating, electro zinc nickel plating, phosphate coating, electro less nickel plating, electro cadmium plating, dacromert 320 / 500 coating, pickled passivated, silver plating, chrome plating, etc. Countersunk Washers/Non Standard Special Countersunk Washers can be avail in various grade materials as mention below:
  • Carbon Steel:Grade 8.8, 10.9, 12
  • Alloy Steel: ASTM A182 F1, F5, F9, F11, F12, F22, F91, F92, AISI 4130, 4140, 4340, EN19, EN24, ASTM A193 B7, ASTM A193, A194, A593, A594, A563, A490, A453, A449, A325, A320, A307, B564, F568, F436, F1554, EN 3506-1, ASTM B16, B5
  • Stainless Steel (SS): 409, 410, 420, 430, 416, 304, 304l, 316l, 316, 310, 347, 347H, 321, 321H, 317, 317L, 316LN, 446C, AISI 660, 254SMO, Alloy 254
  • Precipitation Hardening Steel (PH): 15-5PH, 17-4PH, 17-7PH, 13-8 MO
  • Duplex Steel (DSS): 2205, F51, UNS S31803, S32205
  • Super Duplex Steel (SDSS):2507, F53, UNS S32750, Zeron 100, F55, UNS S32760
  • Inconel: Alloy 600, 601, 617, 625, 690, 702, 706, 713C, 718, 722, 725, 738, X750, 751, 901, 903, 925, 945
  • Incoloy:Alloy 800, 800H, 800HT, 825, 27-7Mo, UNS S31277
  • Monel: Alloy 400, 500
  • Hastelloy: Alloy C22, C276, X
  • Copper(Cupro) Nickel: CU-NI 90/10, CU-NI 70/30
  • Nitronic: Super Alloy 32, 33, 40, 50, 60, UNS S20400, UNS S24100, UNS S24000, UNS S21900, UNS S20910, XM-19, UNS S21800, Alloy 218
  • Nimonic: Alloy 75, 80A, 90
  • High Speed Tool Steel (HSS): M2, M42, Tungsten Carbide
  • Maraging (Vascomax) Steel: C200, C250, C300, C350
  • Invar: Super Alloy 36, 42, 46, 48, 52, 59, NILO 36, 42, 46, 48, 50, Nicrofer 5923, Pernifer 36, 40, 46, 48, 50
  • Kovar: Alloy F15, NILO K, Pernifer 2918
  • Other Super Nickel Alloys: Alloy A286, ASTM A286 GRADE 660A, ASTM A286 GRADE 660B, ASTM A286 GRADE 660C, ASTM A286 GRADE 660D, UNS S66286, WS 1.4980, Waspaloy, AL6XN, UNS S08367, Custom 450, UNS S45000, Sanicro 28, Alloy 20, Alloy 330,
  • Titanium: Alloy Grade 1, 2, 3, 4, 5, 6, 7, 8, 9, 11, 12
  • Aluminum: Alloy 7075, 6061, 2024
  • High Temperature Alloys: 25CrMo4, DUREHETE 1055, DUREHETE 900 T22, 21CrMoV5.7, DUREHETE 950 T31

Additional Information:

  • Item Code: countersunk-washers- non-standard- special-countersunk- washers
  • Pay Mode Terms: L/C (Letter of Credit), T/T (Bank Transfer)
  • Delivery Time: Immediate if ready stock
  • Packaging Details: Wooden Box, Plastic Bags, Wooden crating or as per clients request.