Mil-Carb MC® Grade 8 Washers

Mil Carb Grade 8 Washers are used whenever high-strength hardened steel bolts specify the use of High Strength Mil-Carb Washers with the exclusive MC®, MC2® , or MCx mark of a quality product identification.

Dimensions listed are to ANSI specifications. Grade 8 washers maintain the integrity of high-strength fastener assemblies in OEM or replacement applications. To be used with SAE Grade 5, Grade 8, or better bolts.

Fabricated from prime quality medium carbon steel. Through hardened (quenched and tempered) R/C 38-45, and electro zinc-plated.

MC® Grade 8 washers are available in 1/4″ through 1-1/2″ bolt sizes in U.S. Standard dimensions and 1/4″ through 2″ bolt sizes in SAE dimensions. Other sizes are available through special order.

Certificates of compliance are available upon request.

U.S Standard Dimensions

Bolt SizeOutside DiameterInside DiameterThicknessApprox Lbs per M PcsApprox Pcs per Carton
1/4.734.313.055/.0656.47,500
5/16.875.375.064/.080105,000
3/81.000.438.064/.080133,500
7/161.250.500.064/.080212,500
1/21.375.563.100/.116381,500
9/161.500.625.100/.116461,100
5/81.750.688.122/.13877700
3/42.000.813.122/.13899500
7/82.250.938.136/.160138350
12.5001.063.136/.160169300
1-1/82.7501.250.136/.160198250
1-1/43.0001.375.136/.160235200
1-3/83.2501.500.136/.160274185
1-1/23.5001.625.136/.160317150

S.A.E Dimensions

Bolt SizeOutside DiameterInside DiameterThicknessApprox Lbs per M PcsApprox Pcs per Carton
1/4.625.281.055/.0654.510,000
5/16.688.344.055/.0655.110,000
3/8.813.406.055/.0657.17,000
7/16.922.469.055/.0659.05,000
1/21.063.531.100/.11620.42,425
9/161.188.594.100/.11623.72,250
5/81.313.656.122/.13838.31,340
3/41.469.813.122/.13844.21,120
7/81.750.938.136/.15272.0695
12.0001.063.136/.16091.0555
1-1/82.2501.250.136/.160114435
1-1/42.5001.375.136/.160142350
1-3/82.7501.500.136/.160173289
1-1/23.0001.625.136/.160208240
1-3/43.3751.875.178/.196325150
23.7502.125.178/.196394125