Cage nut or washer nut is a nut with an attached, free-spinning washer. Stainless steel construction offers corrosion resistance; however, consider other environmental factors when selecting materials for specific applications. Stainless Steel Cage Nuts in sizes M4 and M6 are reliable, versatile, and convenient fasteners used in various industries, particularly in securing equipment in rack systems or cabinets where accessible installation points are limited. Their captive design provides an efficient and secure fastening solution without requiring access to both sides of the mounting surface. It is used to make assembly more convenient. Common washer types are star-type lock washers, conical, and flat washers.
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Marking | Standard | Chemistry | Proof Load | Hardness | |||||||
304 | None | None | None | None | |||||||
8 | ASTM A194 | Type 304 stainless steel | Heavy Hex, 80 ksi Hex, 75 ksi | HRB 60 - 105 | |||||||
8A | ASTM A194 | Type 304 stainless steel | Heavy Hex, 80 ksi Hex, 75 ksi | HRB 60 - 90 | |||||||
F594C | ASTM F594 | Type 304 stainless steel | 100 ksi | HRB 95 - HRC 32 | |||||||
F594D | ASTM F594 | Type 304 stainless steel | 85 ksi | HRB 80 - HRC 32 | |||||||
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316 | None | None | None | None | |||||||
8M | ASTM A194 | Type 316 stainless steel | Heavy Hex, 80 ksi Hex, 75 ksi | HRB 60 - 105 | |||||||
8MA | ASTM A194 | Type 316 stainless steel | Heavy Hex, 80 ksi Hex, 75 ksi | HRB 60 - 90 | |||||||
F594G | ASTM A594 | Type 316 stainless steel | 100 ksi | HRB 95 - HRC 32 | |||||||
F594H | ASTM F594 | Type 316 stainless steel | 85 ksi | HRB 80 - HRC 32 |