Unifit Metalloys Inc.
Unifit Metalloys Inc.
Girgaon, Mumbai, Maharashtra
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Spring Washer

Approx. Price: Rs 50 / PieceGet Latest Price

Product Details:

Minimum Order Quantity1 Piece
Metric SizeM3 to M180
Inch Size3/8" to 5"
Length5MM to 3000MM, 0.05 MTR to 3 MTR
Surface FinishingPTFE Coated, Hot Dip Galvanized, Yellow Zinc Plated, Blue Zinc Plated, Black Zinc Plated
Surface FinishingZinc Cobalt Plated, Aluminium Zinc Flake Coated, Black Phosphate, Zinc Plated, Nickel Plated
Surface FinishingCadmium Plated, Chrome Plated, Copper Plated, Silver Plated, Tin Plated
Thread LengthHalf Thread, Full Thread, Double End Threaded, One End Threaded, Customized Thread Length
Thread LengthUNC / UNF / 8UN, BSW
Head TypeHex Head, Roun Head, Square Head, Socket Head, Allen Head, Countersunk
Bolt TypeHex Bolts, Heavy Hex Bolts, Hollow Hex Bolt, Hollow Allen Bolt, Machine Bolt, Socket Head Cap Screw
Bolt TypeAllen Head Cap Screw, Hex Flange Bolt, Eye Bolt, Lag Bolt, J Bolt, U Bolt, Shoulder Bolt, Elevator B
Bolt TypeHanger Bolt, Carriage Bolt, Anchor Bolt, Counter Sunk Bolt, Stud Bolt, Square Head Bolt
Bolt TypeFull Threaded Stud, Double End Threaded Stud
Nut TypeHex Nut, Heavy Hex Nut, Jam Nut, Coupling Nut, Hex Cap Nut, Hex Flange Nut, Hex Weld Nut, Square Nut
Nut TypeSquare Thin Nut, Square Weld Nut, Acorn Nut, Lifting Eye Nut, Wing Nut, T-Slot Nut, Nylock Nut
Nut TypeNylon Nut, Nylock Jam Nut, K Lock Nut, 2 Way Lock Nut, Slotted Castle Nut,
Washer TypePlain Washer, Flat Washer, Lock Washer, Spring Washer, Tab Washer, Shim Washer, Internal Tab Washer
Washer TypeSquare Washer, Square Beveled Washer, Hex Washer, External Tooth Lock Washer, Fender Washer
Washer TypeInternal Tooth Lock Washer, Curved Wave Washer, Conical Spring Washer, Self Locking Washer,
PackingPlastic Sleeve on Threads + Thermacol Roll + Plastic Roll
MakeUnifit Metalloys Inc, India
ASTM GradesASTM A193 B5 Bolts, ASTM A193 B6 Bolts, ASTM A193 B7 Bolts, ASTM A193 B7M Bolts
ASTM GradesASTM A193 B16 Bolts, ASTM A193 B8 Bolts
ASTM GradesASTM A193 B8 class 1 Bolts, ASTM A193 B8 class 2 Bolts, ASTM A193 B8 class 2B Bolts,
ASTM GradesASTM A193 B8A Bolts, ASTM A193 B8C Bolts
ASTM GradesASTM A193 B8C class 1 Bolts, ASTM A193 B8C class 2 Bolts, ASTM A193 B8CA Bolts,
ASTM GradesASTM A193 B8CLN Bolts, ASTM A193 B8CLN class 1 Bolts
ASTM GradesASTM A193 B8CLN class 1D Bolts, ASTM A193 BCLNA Bolts, ASTM A193 B8LN Bolts,
ASTM GradesASTM A193 B8LN class 1 Bolts, ASTM A193 B8LN class 1D Bolts
ASTM GradesASTM A193 B8LNA Bolts, ASTM A193 B8M Bolts, ASTM A193 B8M class 1 Bolts,
ASTM GradesASTM A193 B8M class 2 Bolts, ASTM A193 B8M2 Bolts
ASTM GradesASTM A193 B8M3 Bolts, ASTM A193 B8MA Bolts, ASTM A193 B8MLCuN Bolts,
ASTM GradesASTM A193 B8MLCuN Class 1B Bolts, ASTM A193 B8MLCuN Class 1D Bolts
ASTM GradesASTM A193 B8MLCuN Class 2 Bolts, ASTM A193 B8MLCuNA Bolts, ASTM A193 B8MLN Bolts
ASTM GradesASTM A193 B8MLNA Bolts, ASTM A193 B8MN Bolts
ASTM GradesASTM A193 B8MN Class 1B Bolts, ASTM A193 B8MN Class 1D Bolts, ASTM A193 B8MN Class 2 Bolts,
ASTM GradesASTM A193 B8MNA Bolts, ASTM A193 B8N Bolts
ASTM GradesASTM A193 B8N Class 1B Bolts, ASTM A193 B8N Class 1D Bolts, ASTM A193 B8N Class 2 Bolts,
ASTM GradesASTM A193 B8NA Bolts, ASTM A193 B8P Bolts
ASTM GradesASTM A193 B8PA Bolts, ASTM A193 B8R Bolts, ASTM A193 B8R Class 1C Bolts,
ASTM GradesASTM A193 B8R Class 1D Bolts, ASTM A193 B8RA Bolts
ASTM GradesASTM A193 B8S Bolts, ASTM A193 B8SA Bolts, ASTM A193 B8T Bolts, ASTM A193 B8T Class 1 Bolts,
ASTM GradesASTM A193 B8T Class 2 Bolts, ASTM A193 B8TA Bolts
ASTM GradesASTM A307 GRADE A BOLTS, ASTM A307 GRADE B BOLTS
ASTM GradesASTM A320 Grade L7 Bolts, ASTM A320 Grade L7M Bolts, ASTM A320 Grade L43 Bolts
ASTM GradesASTM A320 Grade B8 Bolts, ASTM A320 Grade B8M Bolts, ASTM A320 Grade B8T Bolts
ASTM GradesASTM A320 Grade B8C Bolts
ASTM GradesASTM A325 Type 1 Bolts, ASTM A325 Type 2 Bolts, ASTM A325 Type 3 Bolts,
ASTM GradesASTM A453 Grade 660 Bolts, ASTM A453 Grade 651 Bolts,
ASTM GradesASTM A453 Grade 662 Bolts, ASTM A453 Grade 665 Bolts,
ASTM GradesASTM A453 Grade 668 Bolts, ASTM A1014 UNS N07718 Bolts
ASTM GradesASTM A1082 UNS S31100 Bolts, ASTM A1082 UNS S31260 Bolts, ASTM A1082 UNS S31803 Bolts
ASTM GradesASTM A1082 UNS S32101 Bolts, ASTM A1082 UNS S32202 Bolts, ASTM A1082 UNS S32205 Bolts
ASTM GradesASTM A1082 UNS S32304 Bolts, ASTM A1082 UNS S32506 Bolts, ASTM A1082 UNS S32550 Bolts
ASTM GradesASTM A1082 UNS S32750 Bolts, ASTM A1082 UNS S32760 Bolts, ASTM A1082 UNS S32906 Bolts
ASTM GradesASTM A1082 UNS S32950 Bolts, ASTM A1082 UNS S39277 Bolts, ASTM A1082 UNS S15700 Bolts
ASTM GradesASTM A1082 UNS S17400 Bolts, ASTM A1082 UNS S17600 Bolts, ASTM A1082 UNS S17700 Bolts
ASTM GradesASTM A1082 UNS S35500 Bolts
ASTM GradesASTM F468 UNS C11000 Bolts, ASTM F468 UNS C26000 Bolts,
ASTM GradesASTM F468 UNS C27000 Bolts, ASTM F468 UNS C46200 Bolts
ASTM GradesASTM F468 UNS C46400 Bolts, ASTM F468 UNS C51000 Bolts,
ASTM GradesASTM F468 UNS C61300 Bolts, ASTM F468 UNS C61400 Bolts
ASTM GradesASTM F468 UNS C63000 Bolts, ASTM F468 UNS C64200 Bolts,
ASTM GradesASTM F468 UNS C65100 Bolts, ASTM F468 UNS C65500 Bolts
ASTM GradesASTM F468 UNS C66100 Bolts, ASTM F468 UNS C67500 Bolts,
ASTM GradesASTM F468 UNS C71000 Bolts, ASTM F468 UNS C71500 Bolts
ASTM GradesASTM F468 UNS N10001 Bolts, ASTM F468 UNS N10276 Bolts,
ASTM GradesASTM F468 UNS N04400 Bolts, ASTM F468 UNS N05500 Bolts
ASTM GradesASTM F468 UNS N06059 Bolts, ASTM F468 UNS N06625 Bolts
ASTM GradesASTM F468 UNS N06686 Bolts, ASTM F468 UNS A92024 Bolts
ASTM GradesASTM F468 UNS A96061 Bolts, ASTM F468 UNS A97075 Bolts
ASTM GradesASTM F468 UNS R50250 Bolts, ASTM F468 UNS R50400 Bolts
ASTM GradesASTM F468 UNS R56400 Bolts, ASTM F468 UNS R56401 Bolts, ASTM F468 UNS R52400 Bolts
ASTM GradesASTM F468 UNS R58640 Bolts, ASTM F468 UNS R55111 Bolts
ASTM GradesASTM F568M Grade Class 4.6 Bolts, ASTM F568M Grade Class 4.8 Bolts,
ASTM GradesASTM F568M Grade Class 5.8 Bolts, ASTM F568M Grade Class 8.8 Bolts
ASTM GradesASTM F568M Grade Class 8.8.3 Bolts, ASTM F568M Grade Class 9.8 Bolts,
ASTM GradesASTM F568M Grade Class 10.9 Bolts,
ASTM GradesASTM F568M Grade Class 10.9.3 Bolts, ASTM F568M Grade Class 12.9 Bolts
ASTM GradesASTM A194 Grade 8R Nuts, ASTM A194 Grade 8RA Nuts, ASTM A194 Grade 8S Nuts
ASTM GradesASTM A194 Grade 8SA Nuts, ASTM A194 Grade 8F Nuts
ASTM GradesASTM A194 Grade 2H Nuts, ASTM A194 Grade 2HM Nuts, ASTM A194 Grade 3 Nuts,
ASTM GradesASTM A194 Grade 4 Nuts, ASTM A194 Grade 6 Nuts
ASTM GradesASTM A194 Grade 6F Nuts, ASTM A194 Grade 7 Nuts, ASTM A194 Grade 7M Nuts
ASTM GradesASTM A194 Grade 16 Nuts, ASTM A194 Grade 8 Nuts
ASTM GradesASTM A194 Grade 8C Nuts, ASTM A194 Grade 8CLN Nuts, ASTM A194 Grade 8M Nuts,
ASTM GradesASTM A194 Grade 8T Nuts, ASTM A194 Grade 8P Nuts
ASTM GradesASTM A194 Grade 8N Nuts, ASTM A194 Grade 8MN Nuts, ASTM A194 Grade 8LN Nuts
ASTM GradesASTM A194 Grade 8MLN Nuts, ASTM A194 Grade MICuN Nuts
ASTM GradesASTM A194 Grade 9C Nuts, ASTM A194 Grade 8A Nuts, ASTM A194 Grade 8CA Nuts
ASTM GradesASTM A194 Grade 8CLNA Nuts, ASTM A194 Grade 8MA Nuts
ASTM GradesASTM A194 Grade 8TA Nuts, ASTM A194 Grade 8FA Nuts, ASTM A194 Grade 8PA Nuts,
ASTM GradesASTM A194 Grade 8NA Nuts, ASTM A194 Grade 8MNA Nuts
ASTM GradesASTM A194 Grade 8LNA Nuts, ASTM A194 Grade 8MLNA Nuts,
ASTM GradesASTM A194 Grade 8MLCuNA Nuts, ASTM A194 Grade 9CA Nuts
ASTM GradesASTM F467 UNS C11000 Nuts, ASTM F467 UNS C26000 Nuts,
ASTM GradesASTM F467 UNS C27000 Nuts, ASTM F467 UNS C46200 Nuts
ASTM GradesASTM F467 UNS C46400 Nuts, ASTM F467 UNS C51000 Nuts, ASTM F467 UNS C61300 Nuts
ASTM GradesASTM F467 UNS C61400 Nuts, ASTM F467 UNS C63000 Nuts
ASTM GradesASTM F467 UNS C64200 Nuts, ASTM F467 UNS C65100 Nuts, ASTM F467 UNS C65500 Nuts
ASTM GradesASTM F467 UNS C66100 Nuts
ASTM GradesASTM F467 UNS C67500 Nuts, ASTM F467 UNS C71000 Nuts, ASTM F467 UNS C71500 Nuts,
ASTM GradesASTM F467 UNS N10001 Nuts
ASTM GradesASTM F467 UNS N10276 Nuts, ASTM F467 UNS N04400 Nuts, ASTM F467 UNS N05500 Nuts
ASTM GradesASTM F467 UNS N06059 Nuts
ASTM GradesASTM F467 UNS N06625 Nuts, ASTM F467 UNS N06686 Nuts, ASTM F467 UNS A92024 Nuts,
ASTM GradesASTM F467 UNS A96061 Nuts
ASTM GradesASTM F467 UNS A97075 Nuts, ASTM F467 UNS R50250 Nuts, ASTM F467 UNS R50400 Nuts,
ASTM GradesASTM F467 UNS R56400 Nuts
ASTM GradesASTM F467 UNS R56401 Nuts, ASTM F467 UNS R52400 Nuts, ASTM F467 UNS R58640 Nuts
ASTM GradesASTM F467 UNS R55111 Nuts
ASTM GradesStainless Steel 304 (UNS S30400 / W.Nr 1.4301),Stainless Steel 304L (UNS S30403 / W.Nr 1.4306)
ASTM GradesStainless Steel 304H (UNS S30409 / W.Nr 1.4948), Stainless Steel 316 (UNS S31600 / W.Nr 1.4401)
Stainless Steel GradesStainless Steel 316L (UNS S31603 / W.Nr 1.4404), Stainless Steel 316H (UNS S31609 / W.Nr.1.4919)
Stainless Steel GradesStainless Steel 317L (UNS S31700 / W.Nr 1.4438)
Stainless Steel GradesStainless Steel 904L (UNS N08904 / W.Nr 1.4539 / URANUS B6)
Stainless Steel GradesStainless Steel 321 (UNS S32100 / W.Nr 1.4541) , Stainless Steel 347 (UNS S34700 / W.Nr 1.4550)
Stainless Steel GradesStainless Steel 316Ti (UNS S31635 / W.Nr 1.4571) , Stainless Steel 310S (UNS S31008 / W.Nr 1.4845)
Stainless Steel GradesStainless Steel 347H (UNS S34709 / W.Nr 1.4961) ,Stainless Steel 321H (UNS S32109 / W.Nr 1.4878)
Stainless Steel GradesStainless Steel 410 (UNS S41000 / W.Nr 1.4006), Stainless Steel 420 (UNS S42000 / W.Nr 1.4021)
Duplex Steel GradeDuplex 31803 (UNS S31803 / W.Nr 1.4462 / F51), Duplex 32205 (UNS S32205 / W.Nr 1.4462 / F51)
Super Duplex Steel GradeSuper Duplex 32760 (UNS S32760 / W.Nr 1.4501/ F53), Super Duplex 2507 (UNS S32750 / W.Nr 1.4410/ F53
Nickel GradeNickel 200 (UNS N02200 / W.Nr 2.4066), Nickel 201 (UNS N02201 / W.Nr 2.4068)
Hastelloy GradesHastelloy C276 (UNS N10276 / W.Nr 2.4819), Hastelloy C22 (UNS N06022 / W.Nr 2.4602)
Monel GradesMonel 400 (UNS N04400 / W.Nr 2.4360), Monel K500 (UNS N05500 / W.Nr 2.4375)
Inconel GradesInconel 600 (UNS N06600 / W.Nr 2.4816), Inconel 601 (UNS N06601 / W.Nr 2.4851)
Inconel GradesInconel 625 (UNS N06625 / W.Nr 2.4856)
Inconel GradesInconel 718 (UNS N07718 / W.Nr 2.4668), Inconel 825 (UNS N08825 / W.Nr 2.4858)
Inconel GradesInconel 800 (UNS N08800 / W.Nr 1.4876) Inconel 800H (UNS N08810 / W.Nr 1.4958),
Inconel GradesInconel 800HT (UNS N08811 / W.Nr 1.4959)
Incoloy GradeIncoloy 800 (UNS N08800 / W.Nr 1.4876) Incoloy 800H (UNS N08810 / W.Nr 1.4958)
Incoloy GradeIncoloy 800HT (UNS N08811 / W.Nr 1.4959)
Titanium GradesTitanium Grade 2 (UNS R50400 / W.Nr 3.7035), Titanium Grade 5 (UNS R56400 / W.Nr 3.7164/65)
Titanium GradesTitanium Grade 7 (UNS R52400 / W.Nr 3.7235)
Cupro-Nickel GradesCupro-Nickel 90/10 (UNS C70600 / W.Nr 2.0872), Cupro-Nickel 70/30 (UNS S71500 / NES780)
Special GradesAlloy 20 (UNS N08020 / W.Nr 2.4660), SMO 254 (UNS S31254 / W.Nr 1.4547)
Alloy Steel GradesAlloy Steel F1 (UNS K11522 / W.Nr 1.5415), Alloy Steel F5 (UNS K41545 / W.Nr 1.7362),
Alloy Steel GradesAlloy Steel F9 (UNS K90941 / W.Nr 1.7386),
Alloy Steel GradesAlloy Steel F11 (UNS K11597 / W.Nr 1.7335), Alloy Steel F12 (UNS K11562 / W.Nr 1.7338),
Alloy Steel GradesAlloy Steel F91 (UNS K91560 / W.Nr 1.4903)
Alloy Steel GradesAlloy Steel F22 (UNS K21590 / W.Nr 1.7380)

Unifit Metalloys Inc is manufacture and stock spring washers in every material such as Brass, Copper, Aluminium, Fibre, Mild Steel (M.S.), Stainless Steel (Grade 201,202,304,316, 316L, 400 etc), Carbon Steel, Spring Steel, High Tensile Steel, Rubber, Plastic, Teflon Etc. Washers are available as per Din, Indian Standards (I.S.), Japanese Standards (J.S.), British Standards (B.S.) & American Standards. Special Washers can be manufactured as per I.D., O.D. & thickness requirement, as per your drawing or as per the sample you provide.

These are also known as Lock washers and are available in Flat and Square Sections.
Material in Stock: - Mild Steel(M.S.), Stainless Steel (S.S.) grade 202, 304, 316, Brass

 

Operation

 

Deflecting under a load, a spring washer is very much like a compression spring. As such, the deflection rate of a wave washer is conditional of the washer's dimensions and materials. Thicker, taller spring washers can sustain more load. When under stress, the raised irregularities of the disc spring flatten to a predetermined degree. Spring washers are either under static or dynamic load. In a static load application, the basic function of the washer is to retain load and the elastic load rating of the washer material may be exceeded. For a dynamic load, the washer functions as a flexing spring and the yield limit must not be exceeded or permanent disfiguration will occur.

 

Spring washers undergo elastic deformation which is reversible and is determined by the material of construction. If the washer is overstressed or near the end of its cycle life, it will experience plastic deformation where some of its deflection is irreversible; this is the first sign of washer fatigue.

 

 

Spring washers have a small footprint and are valued in small machines where a coil spring would be unsuitable. Spring washers can also deflect in a linear, progressive, or regressive means and these devices show a symmetrical deflection around the washer's axis. Spring washers can be stacked to create spring sets or series where deflection and load capacity can vary without materially affecting the forces involved. 


Production

 

 

Production methods of spring washers include stamping, machining, hot forged, rolled, or some combination of these. The following infographic explains common production protocol for spring washers according to material and application requirements.

 

Specifications

 

Washer Dimensions

 

Dimensions of a spring washer are critical to its successful implementation since they are valued for their small size. Like all springs, their dimensions also change depending upon the deflection.

 

  • Outer diameter (OD) is the straight-line width across the washer to its furthest edges.
  • Inner diameter (ID) is the width across the bored hole of the washer.
  • Diameter across slots (DAS) is the measurement of the washer minus the sloped flanges; this is only applicable in belleville washers and may be the same as the inner diameter.
  • Diameter of center rotation (DCR) is distance between the center points of the washer flanges. It is essentially the pitch of the washer.
  • Cone height (CH) is the measurement of the washer between its lowest and highest points while at rest. This should never be more than 40% of the plate thickness
  • Plate thickness (T) is the width of the material used for the washer's construction.
  • Washer envelope is the space allocated for a washer's deflection, as the washer's diameters enlarge when under load.

 

 

 

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Lock Washer

Approx. Price: Rs 50 / PieceGet Latest Price
General Information

Standards
Unifit Metalloys Inc is a Manufacuring,Supplying & Stockist of 
helical spring lock washers qualify under the major standards requirements established by ASME (the American Society of Mechanical Engineers) and DOD (Department of Defense) for components of this type.

Military Specifications
MS35338-, MS35340-, MS51416-, MS51415-, MS51848-, MS122029 thru MS122036, NAS1640, NAS1676 Also Ordnance series 12387272 – XX, 12387302 – XX

AMERICAN SOCIETY OF MECHANICAL ENGINEERS: ASME B 18.13, ASME B 18.21.1, ASME B 18.21.2M

MATERIALS

  • Carbon Steel – SAE 1055 – 1065
  • Boron Steel – 10B55 – 10B65
  • Alloy Steel – SAE 4037
  • Stainless Steel – SAE 304, SAE 316, SAE 420
  • Aluminum Alloy – ASTM-B 211, 7075
  • Phosphor Bronze – ASTM-B 159, Copper Alloy NO.510
  • Silicon Bronze – ASTM-B 99, Copper Alloy NO.651 or 655
  • Monel K500 – QQ – N – 286

Finishes
When carbon steel helical spring washers are required for galvanizing, this must be indicated on the order or inquiry. ASME standards call for such washers to be coiled to limits 0.020″ in excess of conventional standards. Galvanizing is not recommended for washers under a 1/4″ nominal size.

Helical washers are available in the following finishes:

  • Mechanical Zinc
  • Electro Zinc
  • Mechanical Galvanized
  • Hot Dip Galvanized,
  • Phosphate Coating
  • Black Oxide

Other materials and finishes are available on special request. Mechanical Finish will limit exposure to hydrogen embrittlement unless otherwise specified.

Hardness Testing

 

Figure 3

In preparing a helical spring washer for hardness testing, it should first be twisted to remove the helix and form a near flat surface.

Due to the trapezoidal cross section of the washer, both sides must be filed or ground flat to assure accu­rate readings. This also removes decarburization and plating from the surface. Care must be taken to assure that surface temperature does not exceed 250°F during this operation. (See figure 3.)

An essential requirement of the Rockwell test is that the penetrator be perpendicular to the surface of the test piece and that the test piece not move, in the slightest degree, as the test load is applied. One point of hardness represents a depth of only 0.00008″. A movement of only .001″ could cause an error of over 10 Rockwell numbers.

Penetration should be made in the center of the washer’s flattened surface and readings should not be taken too close together. If the indentation is made too close to the edge of the test washer, the material will yield, giving incorrect low readings. Also, the area surrounding the indent will be cold worked. Subsequent indentations, if made in the cold worked area, will give incorrect readings-usually higher that the virgin material. Also, test penetrations should be made on only one side of the washer.

The thickness of the test sample will determine the correct testing weight to use. Refer to Rockwell test charts to determine proper weight and scale use. To insure the most accurate read­ings, use the maximum weight possible. However, caution should be taken not to use a weight greater that the width and thickness will accommodate



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