Types of Fasteners - Nut, Bolt, Screw, Washer

Types and Forms of Fasteners

Fasteners can be divided into two main categories - non-permanent fasteners and permanent fasteners. Non-permanent fasteners (they enable parts to be assembled and disassembled repeatedly) can further be divided into two groups: General fasteners and Threaded fasteners. They are the most widely used type of non-permanent fasteners since they can easily be removed then reused. Threaded fasteners are the principal devices used for assembling components and they are usually grouped into three main categories: Threads can be either external or internal: External Thread are on the outside of a member (such as the threads of bolts and screws). A chamfer on the end of the screw thread makes it easier to engage it into a hole or a nut. An external thread is usually cut using a die or a lathe. Internal Thread are on the inside of a member (such as the threads of nuts and holes). Usually, threaded holes have a chamfer on the side from which the screw will enter to make its engagement easier. An internal thread is usually cut using a tap.

Nut Fasteners

Nut is a type of Fastener widely used with grades like Inconel Nut, Monel Nut, Hastelloy Nut, Incoloy Nut, Stainless Steel Nut, Copper Nickel Nut, Titanium Nut, etc. A Nut is the counterpart of a bolt used together to clamp two or more parts having unthreaded holes together.

• Acorn Nut
• Bulkhead Nut
• Butterfly Nut
• Cap Nut
• Castle Nut
• Coupling Nut
• Domed Nut
• Flange Nut

• Hex Cap Nut
• Hex Domed Cap Nut
• Hex Flange Nut
• Hex Jam Nut
• Hex Machine Nut
• Hex Nut
• Hex Self Locking Nut
• Hex Slotted Thin Nut

• Nylon Locking Nut
• Slotted Nut
• Slotted Round Nut
• Spring Nut
• Square Nut
• T-nuts
• Thin Hex Nut
• Weld T-nuts

• Heavy Hex Nut
• Hexagon Nut
• Jam Nut
• Lock Nut
• Nylon Hex Jam Nut
• Nylon Insert Lock Nut
• Nylon Lock Nut
• Wing Nut

Bolt Fasteners

Bolt is a type of Fastener widely used with grades like Inconel Bolt, Monel Bolt, Hastelloy Bolt, Incoloy Bolt, Stainless Steel Bolt, Copper Nickel Bolt, Titanium Bolt, etc. A bolt has a head on one end and threads on the other end and it is paired with a nut.

• Anchor Bolt
• Carriage Bolt
• Eye Bolt
• Flange Bolt

• Hanger Bolt
• Hex Head Bolt
• J Bolt
• Machine Bolt

• Plow Bolt
• Lag Bolt
• Shoulder Bolt
• Square Head Bolt

• Tap Bolt
• U Bolt
• Elevator Bolt
• Stud Bolt

Screw Fasteners

Screw is a type of Fastener widely used with grades like Inconel Screw, Monel Screw, Hastelloy Screw, Incoloy Screw, Stainless Steel Screw, Copper Nickel Screw, Titanium Screw, etc. Screw are used to join two mating parts together, similar to bolts, they have the head on one end and threads on the other end. However, screws usually have longer threads than bolts, also they can be made with slotted heads.

• Allen Screws
• Button Head Screws
• Cap Screws
• Cheese Head Screws
• Countersunk Cap Screws
• Countersunk Head Screws

• Countersunk Screws
• Drywall Screws
• Flat Head Screws
• Grub Screws
• Hex Cap Screw
• Hex Screws

• Hexagon Screw
• Jack Screw
• Lag Screw
• Machine Screws
• Micro Screws
• Mirror Screws

• Pan Head Screws
• Self-tapping Screws
• Set Screws
• Sheet Metal Screws
• Slotted Screws
• Socket Screws

Washer Fasteners

Washer is a type of Fastener widely used with grades like Inconel Washer, Monel Washer, Hastelloy Washer, Incoloy Washer, Stainless Steel Washer, Copper Nickel Washer, Titanium Washer, etc. Washer are commonly used under the heads of bolts and screws and they are used under nuts as well. The most common type of washers is the Flat Washer, where it is used to increase the bearing areas of the head, and protect the material finish during assembly.

• Dock Washer
• Fender Washer
• Flat Washer
• Lock Washer

• External Tooth Lock Washer
• Internal Tooth Lock Washer
• Structural Washer
• Square Washer

• Spring Washer
• Plain Washer
• Teeth Washer
• Ogee Washer

• Fender Washer
• Bend Washer
• Split Lock Washer
• Hex Washer

Fasteners DIN Standards / Specifications

• DIN 970 Hexagon Nut
• DIN 929 Hexagon Weld Nut
• DIN931 Hex Head Cap Screw
• DIN 934 Hex Nut – Nylon
• DIN 935 Hex Castle Nut
• DIN 9021 Fender Washer
• DIN 912 Socket Cap Screw
• DIN 439 Hexagon Thin Nut
• DIN 936 Hexagon Jam Nut
• DIN 6797 Tooth Lock Washer
• DIN 555 Hexagon Nut
• DIN 558 Hex Head Screw
• DIN 580 Lifting Eye Bolt
• DIN 444 Eyebolts
• DIN 6923 Hex Flange Nut
• DIN 127 Spring Lock Washer
• DIN 5406 Lock Washer

• DIN 125 Flat Washer For Hexagon Bolt
• DIN 479 Square Head Set Screw
• DIN 601 Hexagon Head Bolt With Nut
• DIN 603 Carriage Bolt With Hex Nut
• DIN 7980 High Collar Lock Washer
• DIN 6912 Low Head Socket Cap Screw
• DIN 913 Socket Set Screw Flat Point
• DIN 914 Socket Set Screw Cone Point
• DIN 915 Socket Set Screw Dog Point
• DIN 916 Socket Set Screw Cup Point
• DIN 128 Curved / Wave Lock Washer
• DIN 137 Curved / Wave Spring Washer
• DIN 315 Wing Nut With Round Wings
• DIN 316 Wing Screw With Round Wings
• DIN 6921 Hexagon Flange Bolt
• DIN 404 Slotted Capstan Screw
• DIN 126 Plain Washer For Hexagon Bolt

• DIN 1587 Hexagon Domed Cap Nut / Acorn Nut
• DIN 417 Slotted Set Screw With Long Dog Point
• DIN 427 Slotted Headless Screw With Flat Point
• DIN 433 Flat Washer For Cheese Head Screw
• DIN 438 Slotted Set Screw With Cup Point
• DIN 551 Slotted Set Screw With Flat Point
• DIN 553 Slotted Set Screw With Cone Point
• DIN 7985 Phillips Pan Head Machine Screw
• DIN 7984 Hexagon Socket Thin Head Cap Screw
• DIN 7991 Flat Head Countersunk Socket Cap Screw
• DIN 84 Slotted Cheese Head Machine Screw
• DIN 85 Slotted Pan Head Machine Screw – Nylon
• DIN 921 Slotted Pan Head Screw With Large Head
• DIN 923 Slotted Pan Head Screw With Shoulder
• DIN 963 Slotted Flat Head Countersunk Screw
• DIN 965 Phillips Flat Head Machine Screw
• DIN 966 Phillips Oval Countersunk Machine Screw

Fasteners ISO Standards / Specifications

• ISO 4035 Hexagon Thin Nut
• ISO 4036 Hexagon Jam Nut
• ISO 4034 Hexagon Nut
• ISO 4018 Hex Head Screw
• ISO 1665 Hex Flange Bolt
• ISO 1661 Hex Flange Nut
• ISO 7093 Fender Washer
• ISO 4762 Socket Cap Screw
• ISO 4032 Hex Nut – Nylon
• ISO 4032 Hexagon Nut
• ISO 4014 Hex Head Cap Screw

• ISO 4026 Socket Set Screw Flat Point
• ISO 4027 Socket Set Screw Cone Point
• ISO 4028 Socket Set Screw Dog Point
• ISO 4029 Socket Set Screw Cup Point
• ISO 4017 Hexagon Head Screw
• ISO 4016 Hexagon Head Bolt With Nut
• ISO 7089 Flat Washer For Hexagon Bolt
• ISO 7090 Flat Washer For Hexagon Bolt
• ISO 7046 Phillips Flat Head Screw
• ISO 7045 Phillips Pan Head Machine Screw
• ISO 7091 Flat Washer For Hex Head Bolt

• ISO 7435 Slotted Set Screw With Long Dog Point
• ISO 2342 Slotted Headless Screw With Flat Point
• ISO 7092 Flat Washer For Cheese Head Screw
• ISO 7436 Slotted Set Screw With Cup Point
• ISO 4766 Slotted Set Screw With Flat Point
• ISO 7434 Slotted Set Screw With Cone Point
• ISO 10642 Flat Head Countersunk Socket Cap Screw
• ISO 1207 Slotted Cheese Head Machine Screw
• ISO 1580 Slotted Pan Head Machine Screw – Nylon
• ISO 2009 Slotted Flat Head Countersunk Machine Screw
• ISO 7047 Phillips Oval Countersunk Machine Screw

Fasteners ASTM Standards / Specifications

• ASTM A307 Bolt Fasteners
• ASTM A354 Bolt Fasteners
• ASTM A449 Bolt Fasteners
• ASTM F594 Nut Fasteners
• Astm F467 Nut Fasteners
• ASTM F468 Bolt Fasteners
• ASTM F468 Bolt Fasteners
• ASTM F593 Bolt Fasteners
• ASTM A563 Nut Fasteners
• ASTM F2281 Bolt Fasteners

• ASTM F3125 Bolt Fasteners
• ASTM A194 Nut & Bolt Fasteners
• ASTM A449 Hex Cap Screw Fasteners
• ASTM F468 Hex Cap Screw Fasteners
• ASTM F468 Hex Cap Screw Fasteners
• ASTM F738M Screw Fasteners
• ASTM F959 Washer Fasteners
• ASTM F593 Hex Cap Screw Fasteners
• ASTM F738M Metric Bolt Fasteners
• ASTM F836 Metric Nut Fasteners

• ASTM A354 Externally Threaded Fasteners
• ASTM F436 Hardened Steel Washer Fasteners
• ASTM F835 Flat Countersunk Head Cap Screw
• ASTM F468 Socket Head Cap Screw Fasteners
• ASTM F468 Socket Head Cap Screw Fasteners
• ASTM A574 Socket Head Cap Screw Fasteners
• ASTM F837 Socket Head Cap Screw Fasteners
• ASTM F844 Plain / Flat Washer Fasteners
• ASTM F879 Flat Countersunk Head Cap Screw
• ASTM F2281 Hex Cap Screw Fasteners