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Belleville Lock Assembly Washer Option


Available in steel or stainless steel for all captive panel screws (any head style or thread size)

The Belleville washer material for steel screws is Heat Treated Spring Steel QQ-S-700/ASTM A 684

The Belleville material for stainless steel screws is Stainless Steel Type 301-304

Standard fastener products having a class 2A thread, once plated, may not enter 2A GO and NO-GO Gages.


  Thread  
  I.D.  
  'B'  
  O.D.  
  'A'  
  Thickness  
  'C'  
  Height  
  'H'  
  Bellville  
  Washer  
  Number  
  2-56
  .078
  .150
  .008
  .028
  24007
  4-40
  .097
  .203
  .010
  .030
  24023
  6-32
  .119
  .200
  .005
  .030
  24043
  8-32
  .156
  .312
  .025
  .040
  24087 (I.D. .156)  
  10-32
  .173
  .365
  .015
  .035
  24105
  1/4-20
  .234
  .562
  .030
  .050
  24165 (I.D. .234)  
  3/8-16
  .334
  .620
  .015
  .080
  24231

FINISHES

1
No finish
NO FINISH
6
Cadmium Plate Clear
CADMIUM PLATE 00-P-416-F-Type I-Class 2-Clear Chromate
7
Cadmium Commercial Plate,
CADMIUM PLATE COMMERCIAL - Type I, Class 3"
8
Cadmium Color Chromate Plate
CADMIUM PLATE 00-P-416-F-Type II - Class 3 - Color Chromate Finish
9
Nickel Plate, Grade G
NICKEL PLATE - QQN-290-A-Class 1, Grade G, (thickness - .0002- SB) (single layer coating fully bright)
11
Black oxide, Class 4
BLACK OXIDE - MIL-C-13924-C-AMEND #1 Class 4. For 300 series corrosion resistance steel alloys only.
12
Passivate, Type I
PASSIVATE - MIL-F-14072-C (ER) AMEND #1 - Type I. (Finish #E300 - Passivate per ASTM-A-380-96)
20
Tin Type II
"TIN PLATE (Electro Deposit) MIL-T-10727-C, Type I"
31
Zinc Plate Type I
ZINC PLATE - ASTM B633185 Type I - Class FEIZN5-SC-I (thickness .00025)
31a
Zinc Plate Type II
ZINC PLATE - Colored Chromate - ASTM B633185 Type II - FEIZN5- SC-1 (thickness -.00025)
32
Solder Plate .0003-.0001 Thick (Solder per QQ-S-571, Sn60) over Nickel Plat .0001-.0005
ZINC PLATE - Colored Chromate - ASTM B633185 Type II - FEIZN5- SC-1 (thickness -.00025)