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When selecting finishes, select the RoHS compliant finishes. They are better for the environment and less expensive!

 

ST-1200 Line - Size 7 Studs

The information on the ST-1200 Size 7 products are provided for existing applications. For new applications, please use the Size 65 products.

Standard Parts
Component Material Finish1
Stud Hardened Steel Zinc Trivalent Clear .0003 thick. Trivalent Chromate Clear with Sealer (RoHS Compliant)
Specification(s): ASTM-B-633, Type III, SC 2, Clear
Suffix: -Z3CT
D-ring hard music wire Zinc Trivalent Clear .0003 thick. Trivalent Chromate Clear with Sealer (RoHS Compliant)
Specification(s): ASTM-B-633, Type III, SC 2, Clear
Suffix: -Z3CT
Wing carbon steel Zinc Trivalent Clear .0003 thick. Trivalent Chromate Clear with Sealer (RoHS Compliant)
Specification(s): ASTM-B-633, Type III, SC 2, Clear
Suffix: -Z3CT
Optional Stainless Steel
Stud and Wing 303 Stainless Steel Natural
D-Ring 400 series Stainless Steel Natural
1 Optional Finishes: Change the plating suffix on the part number from "Z3CT" to the desired plating. See finishes pages.

Stud Dimensions

SLOTTED: 121J-7*-Z3CTPHILLIPS: 121J-P7*-Z3CTHEX: 121J-H7*-Z3CT
Stud Picture Stud Picture Stud Picture

Click here for the Engineering Drawing
121J-7 Revision A

Stud Dimension Drawing Stud Dimension Drawing Stud Dimension Drawing
Stud Picture
Slotted
Part Number
Stud Picture
Phillips
Part Number
Stud Picture
Hex Recess
Part Number
Undercut Dimension (U) Grip Length (G)
Steel Steel Steel (inch) (mm) (inch) (mm)
121J-735-Z3CT121J-P735-Z3CT121J-H735-Z3CT.1754.45.3508.89
121J-740-Z3CT121J-P740-Z3CT121J-H740-Z3CT.1904.83.40010.16
121J-750-Z3CT121J-P750-Z3CT121J-H750-Z3CT.2506.35.50012.70
121J-760-Z3CT121J-P760-Z3CT121J-H760-Z3CT.3007.62.60015.24
121J-770-Z3CT121J-P770-Z3CT121J-H770-Z3CT.3508.89.70017.78
121J-780-Z3CT121J-P780-Z3CT121J-H780-Z3CT.45011.43.80020.32
121J-790-Z3CT121J-P790-Z3CT121J-H790-Z3CT.55013.97.90022.86
121J-7100-Z3CT121J-P7100-Z3CT121J-H7100-Z3CT.65016.511.00025.40
121J-7110-Z3CT121J-P7110-Z3CT121J-H7110-Z3CT.65016.511.10027.94
121J-7120-Z3CT121J-P7120-Z3CT121J-H7120-Z3CT.65016.511.20030.48
WING: 121J-W7*-Z3CT
Stud Picture

Click here for the Engineering Drawing
121J-W7 Revision A

Stud Dimension Drawing
Stud Picture
Wing
Part Number
Undercut Dimension (U) Grip Length (G)
Steel (inch) (mm) (inch) (mm)
121J-W735-Z3CT.1754.45.3508.89
121J-W740-Z3CT.1904.83.40010.16
121J-W750-Z3CT.2506.35.50012.70
121J-W760-Z3CT.3007.62.60015.24
121J-W770-Z3CT.3508.89.70017.78
121J-W780-Z3CT.45011.43.80020.32
121J-W790-Z3CT.55013.97.90022.86
121J-W7100-Z3CT.65016.511.00025.40
121J-W7110-Z3CT.65016.511.10027.94
121J-W7120-Z3CT.65016.511.20030.48
FLUSH: 126J-7*-Z3CT
Stud Picture
Stud Dimension Drawing
Stud Picture
Flush
Part Number
Undercut Dimension (U) Grip Length (G)
Steel (inch) (mm) (inch) (mm)
126J-750-Z3CT.2506.35.50012.70
126J-760-Z3CT.3007.62.60015.24
126J-770-Z3CT.3508.89.70017.78
126J-780-Z3CT45011.43.80020.32
126J-790-Z3CT.55013.97.90022.86
126J-7100-Z3CT.65016.511.00025.40
126J-7110-Z3CT.65016.511.10027.94
126J-7120-Z3CT.65016.511.20030.48
KNURLED: 1211-7*-Z3CTTAMPER RESIST: 1230-7*-Z3CTRING: 122J-R7*-Z3CT
Stud Picture Stud Picture Stud Picture

Click here for the Engineering Drawing
122J-R7 Revision B

Stud Dimension Drawing Stud Dimension Drawing Stud Dimension Drawing
Stud Picture
Knurled
Part Number
Stud Picture
Tamper Resist
Part Number
Stud Picture
Ring
Part Number
Undercut Dimension (U) Grip Length (G)
Steel Steel Steel (inch) (mm) (inch) (mm)
1211-735-Z3CT1230-735-Z3CT122J-R735-Z3CT.1754.45.3508.89
1211-740-Z3CT1230-740-Z3CT122J-R740-Z3CT.1904.83.40010.16
1211-750-Z3CT1230-750-Z3CT122J-R750-Z3CT.2506.35.50012.70
1211-760-Z3CT1230-760-Z3CT122J-R760-Z3CT.3007.62.60015.24
1211-770-Z3CT1230-770-Z3CT122J-R770-Z3CT.3508.89.70017.78
1211-780-Z3CT1230-780-Z3CT122J-R780-Z3CT.45011.43.80020.32
1211-790-Z3CT1230-790-Z3CT122J-R790-Z3CT.55013.97.90022.86
1211-7100-Z3CT1230-7100-Z3CT122J-R7100-Z3CT.65016.511.00025.40
1211-7110-Z3CT1230-7110-Z3CT122J-R7110-Z3CT.65016.511.10027.94
1211-7120-Z3CT1230-7120-Z3CT122J-R7120-Z3CT.65016.511.20030.48

* is the "Stud Grip". For example, 121J-740 is an oval head stud with a "Stud Grip" of 40.

The undercut is a part of the stud which is smaller in diameter than the stud shank. The undercut is located directly under the head. This decreased diameter is where the retainer fits to prevent the stud from coming out of the mounting hole.

Note: For all raised head styles, the "G" (Grip) and "U" (Undercut) dimensions are measured to the underside of the head. For the flush head style, the "G" (Grip) and "U" (Undercut) dimensions are measured to the top of the head.