Flat washers are unique washers that have slightly larger inner diameters than fender washers. American metric washers size table metric washers per ansi b18. Washers provide a smooth bearing surface and are used under the head of a bolt and or a nut. Din 9021 dimensions, specifications, standard, weights. These custom produced, extra thick flat washers come in various sizes from 14 to 1 bolt size. Portland bolt has the ability to manufacture or provide nonstandard. A nylon washer is often placed under a machine screw to reduce noise and abrasion and offer electrical insulation. The following tables define the sizes for metric flat washers per iso 7089. They are used with a bolt or screw to evenly spread the load over a wider area. I n c i n c i n c i n c i n c i n c i n c i n c washers metric standard flat washers metric standard flat washers normal series,gradea iso 7089 nominal size id od t internal diameter outside diameter thickness max min max min max min 1. Iso hardware engineering data ansi hardware engineering data. These heat treated washers are for general purpose and structural use and are suitable for use with a325 and a490 structural bolts.
Flat washers are covered under the astm specification f844. Din 127 are available in two forms, type a and type b. The tolerances of the thickness and outside diameter of typeb washers are tighter than for uss and sae flat washers. Iso flat washer size table chart iso 7089 engineers edge.
Applications advantages designed for use with flat or oval head screws with countersunk angles of 82 or 100. Wrought requires certification from its vendors that steel used to manufacture washers is melted and manufactured in the u. Class 300 hv washers are also hardened and tempered. Standard uss and society of automotive engineers sae washers are stocked in plain and zinc plated finishes. Stainless steelself colour brassself colour dimensions for metric screws d nom d nom s nom m1. Astm f436 covers the chemical and mechanical requirements for hardened washers in diameters ranging from 14.
Din 9021 plain washer, outer diameter about 3 d dimensions, specifications, standard, weights, equivalent and download pdf. For use when extra thickness is needed or to reduce the risk of cupping. Description a thin, flat circular part with a centrally located hole. We offer flat washers measured in metric units for service professionals and doityourself enthusiasts who specifically need those types of washers. Material sae 1050 1065 or equivalent spring steel hardness rockwell c40 50 plating see appendixa for information on the plating of steel lock washers. Flat washers protect surfaces by evenly distributing torque when tightening a bolt or screw and prevent corrosion between a steel screw and an aluminum surface. Specification din 125 this table define the dimensional limits of metric washers din 125 metric hex head screw iso hex head bolts, iso 4014, iso 4016, iso 4017, iso 4018. Button head and flat head socket cap screws 52 socket set screws 53 hexagon keys and bits 54 socket head shoulder screws, dowel pins, and slotted set screws 55 square head set screws and socket pipe plugs 56 physical properties of sockets 56 point terminology 57 flange 12point screws 58 to 59 taper pins 510. Belleville bond sealing usssae dimensions counter sunk finishing dock fender flat lock lock washer specs neoprene. Astm f436 washers f436 washer dimensions wrought washer.
Washer sizes correspond to the screwbolt diameter they. Din125 flat washer dimensions west coast fasteners. Most washers bought, sold and used the united states are measured in inches or fractions of inches. Associated products belleville bond sealing usssae dimensions counter sunk finishing dock fender flat lock lock washer specs neoprene square bevel star.
The a in 125a denotes that this washer is not chamfered. Din 9021 plain washer, outer diameter about 3 d dimensions, specifications, standard, weights, equivalent and download pdf email. The outside diameter of this variety washer is approximately 712% smaller than that. The type b plain washers come in narrow, regular and wide series with proportions designed to distribute. Metric flat washers order metric flat washers online. Portland bolt has the ability to manufacture or provide nonstandard square, rectangular, or. If the order received does not meet these requirements, it may result in a supplier corrective action request, which could jeopardize your status as an approved vendor. Flat plain ansi type a washer size table chart engineers edge.
Flat round commercial washers metric mild steel black as1237 un0300. Flat washers are used to improve stress distribution. Washers uss wrought washers 61 stainless steel washers 62 to 63 s. A thin, flat circular part with a centrally located hole. Flat washers are primarily manufactured to this large range of standard. If a standard washer does not meet your requirements. Metric din 127 type b helical spring split lock washers. Flat washers are essential fasteners to keep on hand.
A thin, flat, circular metal part with a centrally located hole. Flat washers are used to improve stress distribution, and to span large clearance holes. Stainless steel flat washer dimensions all dimensions are approximate and for reference only. Flat washer dimension comparison charts on the fastenerdata website cover the international range of flat washers, british, global din and american ansi flat washers prime function is to spread the bearing face pressure clamp load under a bolt or nut over a larger surface area, preventing damage from the hexagon. The type b plain washers come in narrow, regular and wide series with proportions designed to distribute the load over larger areas of lower strength materials. Size, dimensional and tolerance data given is for type a plain flat washers, ansiasme b18. Applications advantages washers are for assembly around a bolt or screw, between the bearing surface of the fastener and the part to which it is attached. When compressed by tightening the nut, the washer bites into the substrate and exerts a spring force between the bolt and the substrate creating frictional resistance to rotation. Flat washers also prevent loosening due to vibration, stop the bolt or screw from pulling through, and can act as spacers. Applications advantages this is the most commonly used flat washer with low carbon bolts, screws and nuts. Unless specified, all dimensions are in millimeters some products are. Flat round commercial washers metric mild steel black as1237.
Additionally, they are used with bolts per a449, a354, a193, a320, f1554 and whenever specified. Sizes and availability for flat washer to din433 in metric measurements, in a2 stainless steel, a4 stainless steel, brass, steel 140 hv materials. These washers are unhardened and intended for general use. Washers are for assembly around a bolt or screw, between the bearing surface of the fastener and the part to which it is attached. A 304 stainless steel flat washer is a round outer diameter thin plate with a center hole inner diameter punched to the size of the bolt or screw size. Washers 64 brass washers 64 to 65 beveled washers 65 spring lock washers 66 to 68 tooth lock washers 69 to 611 belleville washers 612 anchors wedge anchors 71 dropin anchors 72 single expansion anchors 72 machine screw anchors 72.
Metric flat washers dimensions form a din 125 form b bs 4320 form c bs 4320 size od thickness od thickness od thickness m3 7 0. We offer a wide selection of uss and sae washers in a variety of standard and exotic materials. Type din 127 a have bent up tang at both ends of the washer. Customers frequently bought these along with nas620c10.
13 1367 384 1368 1339 1490 739 528 371 1267 1509 1128 5 338 982 1012 426 871 661 1015 1018 998 1060 1030 1219 1310 1126 1116 536 1107 624 1213