1.4 Terminology
For definitions of terms relating to fasteners or component features thereof used in this Standard, refer to
ASME B18.12.
1.5 Referenced Standards
The following is a list of publications referenced in this Standard,
ASME 134.2, Preferred Metric Limits and Fits ASME Bl8.l2, (ilossary of Terms for Mechanical
ASME B18.18.IM. Inspection and Quality Assurance for General Purpose Fasteners
ASME B 18.24.3, Part Identifying Number (PIN) (‘ode System Standard flr B 1 8 Nonthreaded Products
ASME 846.1, Surface Texture
ASME Y 14.5M. Dimensioning and Tolerancing
ASME Y14.36, Surface Texture Symbols
Publisher: American Society of Mechanical Engineers
(ASME), Three Park Avenue. New York, NY 10016;
Order Department: 22 Law Drive, Box 2300. Fairfield,
Ni 07007
ISO 2341:1986, Clevis Pins With Head
Publisher: International Orgai,ization for Standardization (ISO), 1 rue. de Varembe, Case Postale 56, CH1 211, Geneve 20, Switzerland/S uisse
1.6 Designation
1.6.1 Pins conforming to this Standard shall be designated by the following data, preferably in the sequence shown:
(a) product name
(h) ASME document number
(c) type. A or B, preceded by a dash
(d) nominal shank diameter. D, preceded by a dash
(e) diameter tolerance class, if other than standard
(fl nominal pin length, L, preceded by ‘x”
(g) for type B, hole size. D1, if other than standard preceded by “x”
2.4 Points
The points of the pins shall be chamtèred 30 deg to the point diameters. D,,, specified in Table I.
2.5 Hole Location for Type B Pins
2.5.1 Length Between Hole Centers. The standard nominal lengths, L,,, between hole ceiiters are specified in Table 2, and are recommended for use with the standard hole sizes. The tolerances on the length between hole centers are specified in Table 4.
If larger than standard holes are specified, it may be necessary to specify a shorter length, L,,. between hole centers to mainlain adequate material between the edge of the hole and the end of the pin, or to avoid a sharp edge between the countersunk hole and the end chamfer. See Appendix A.
2.5.2 Position of Hole. The axis of the hole shall he within the positional tolerance specified in Table 5 with respect to the axis of the pin, determined over a length from the center of the hole equal to the nominal pin diameter, 1), at maximum material condition, and perpendicular to the axis of the pin within 2 deg.
2.6 Material and Hardness
Unhardened clevis pins shall he furnished unless hardened is specified.
2.6.1 Unhardened Clevis Pins. Unhardened steel clevis pins shall he made from steel with a maximum carbon content of 0.28%, and shall have hardness of
125—245 HV, 119—234 HIl, or 69—99 HRI3.
2.6.2 Hardened Clevis Pins. Hardened steel clevis pins shall he marked with a capital “H” on one end. tinless otherwise specified by the purchaser, hardened clevis pins may he either through hardened or case hardened as follows:
(a) Through hardened clevis pins shall be made from SAE 52100, AISI E52 100. UNS G52986, or equivalent alloy steel, and shall have a hardness of 550—65() HV3O,
52—58 IIRC, or 517—611 HB.
(b) Case hardened clevis pins shall be made from low carbon steel, such as SAE/AISI 1010, UNS GlO 100, or SAFJAISI 12L14, UNS G12l44. or equivalent, and shall have a surface hardness of 600—700 1-IVI or 88— 90 HRI5N, and a minimum hardness at case depth of
0.25—0.4 mm of 550 HVI or 87 HRI5N.
2.7 Workmanship
Clevis pins shall be free froni burrs, sharp edges, loose scale, and all other detrimental defcts.