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Maximum Torque Values

Ceramco has established (maximum) service torque values for customers whose application(s) may be dependent on specific torque or preload requirements

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Solid Ceramic

Slotted Pan Head Machine Screws & Bolts - U.S. Inch  | → Metric

stock ceramic pan head slotted fasteners - U.S. InchU.S. inch pan head slotted solid ceramic bolts and machine screws are fully threaded. Our solid ceramic fasteners are manufactured conforming to ISO 9001:2015 practices and ideally suited for environments susceptible to corrosive agents, high temperatures or electrical discharge.

Manufactured in America. Ready to ship from our large inventory of fasteners.

No Free Samples

*Available sizes, compositions and lengths vary and may be dependent upon material properties and performance characteristics. Please check our website for the most up-to-date information.

Pan head slotted U.S. Inch fastener dimensional reference

To order fasteners:find the correct size, then select the composition you require.

    A B C D E
Size Com­posi­tion Head
Diam­eter
Head
Height
Head
Radius
Slot
Width
Slot
Depth
#0-80 alumina .104 - .116 .031 - .039 .020 Max .016 - .023 .014 - .022
zirconia
#2-56 alumina .155 - .167 .045 - .053 .035 Max .023 - .031 .022 - .031
zirconia
#4-40 alumina .205 - .219 .058 - .068 .042 Max .031 - .039 .030 - .040
zirconia
#5-40 alumina .231 - .245 .065 - .075 .044 Max .035 - .043 .034 - .045
zirconia
#6-32 alumina .256 - .270 .072 - .082 .046 Max .039 - .048 .037 - .050
zirconia
#8-32 alumina .306 - .322 .085 - .096 .052 Max .045 - .054 .045 - .058
zirconia
#10-24 alumina .357 - .373 .099 - .110 .061 Max .050 - .060 .053 - .068
zirconia
#10-32 alumina .357 - .373 .099 - .110 .061 Max .050 - .060 .053 - .068
zirconia
1/4"-20 alumina .473 - .492 .130 - .144 .087 Max .064 - .075 .070 - .087
zirconia
1/4"-28 alumina .473 - .492 .130 - .144 .087 Max .064 - .075 .070 - .087
zirconia
5/16"-18 alumina .594 - .615 .162 - .178 .099 Max .072 - .084 .085 - .106
zirconia
3/8"- 16 alumina .716 - .740 .195 - .212 .143 Max .081 - .094 .100 - .124
zirconia

Dimensions Per ANSI B18.6.3-1972 (R1991)

Important Information -Please Read

Alumina & zirconia (PSZ) fasteners

  1. The pitch diameter of male threads will not exceed the max allowable according to Class 2. Minimum allowable pitch diameter may be below that of Class 2, conversely for female threads. Due to shrink factor variances, the stack up tolerance cannot be controlled on the pitch. It is recommended that you not engage more than 5 to 10 threads on any male fastener.
  2. No warranty with respect to torque strength and tensile strength is extended or implied. Ceramic materials are inherently brittle and display catastrophic failure if impacted or stressed beyond material limits.

Heat Resistant Corrosion Resistant Non-conductive Non Out-Gassing

Stock ceramic fasteners from Ceramco, Inc. Specializing in custom ceramic parts of complex geometries. Learn More.

Immediate Assistanceis only a phone call away. If you have any questions or require additional information, please call Ceramco at: +1 (603) 447-2090, Monday - Friday, 8:00 am - 4:30 pm, U.S. Eastern.