Specification
Where to buy| Item | Value |
|---|---|
| Type | Structural panel fastener, stud bolt assembly |
| Status | Manufacturer part. Check the manufacturer for any later revision before ordering. |
Part numbers
Part numbers commonly stocked. The standard governs and may list others.
1/4 (.2500-28, 2 lead)4 part numbers
| Part no. | Grip G min - max, in (rings: finish) | Length, in | A dia, in | C dia, in | D dia, in |
|---|---|---|---|---|---|
| CA21037-4-2HS | .150 - .290 | .972 | .440 / .430 | .375 | .2495 / .2470 |
| CA21037-4-4HS | .291 - .430 | 1.112 | .440 / .430 | .375 | .2495 / .2470 |
| CA21037-4-6HS | .431 - .570 | 1.252 | .440 / .430 | .375 | .2495 / .2470 |
| CA21037-4-8HS | .571 - .710 | 1.392 | .440 / .430 | .375 | .2495 / .2470 |
3/8 (.3750-24, 2 lead)4 part numbers
| Part no. | Grip G min - max, in (rings: finish) | Length, in | A dia, in | C dia, in | D dia, in |
|---|---|---|---|---|---|
| CA21037-6-2HS | .150 - .290 | 1.170 | .564 / .554 | .505 | .3745 / .3730 |
| CA21037-6-4HS | .291 - .430 | 1.210 | .564 / .554 | .505 | .3745 / .3730 |
| CA21037-6-6HS | .431 - .570 | 1.350 | .564 / .554 | .505 | .3745 / .3730 |
| CA21037-6-8HS | .571 - .710 | 1.490 | .564 / .554 | .505 | .3745 / .3730 |
1/42 part numbers
| Part no. | Grip G min - max, in (rings: finish) | Length, in | A dia, in | C dia, in | D dia, in |
|---|---|---|---|---|---|
| CA21037-4R | Passivated | — | A dia ref. .355 | — | — |
| CA21037C-4R | Cad plated, Type II Class 2 | — | A dia ref. .355 | — | — |
3/82 part numbers
| Part no. | Grip G min - max, in (rings: finish) | Length, in | A dia, in | C dia, in | D dia, in |
|---|---|---|---|---|---|
| CA21037-6R | Passivated | — | A dia ref. .480 | — | — |
| CA21037C-6R | Cad plated, Type II Class 2 | — | A dia ref. .480 | — | — |
Part number
What each code means
| Part | Meaning |
|---|---|
| Format | CA21037-<size>-<grip>HS |
| Example | CA21037-4-2HS — 1/4 size, grip .150-.290, hex socket recess |
Notes from the standard
- First dash: size (-4 = 1/4, -6 = 3/8); second dash: grip. The listing sample reads CA21037-4-10 HS, with HS the hex socket recess.
- Length shown is for the size of the first dash. A and D are max / min as listed.
- Retaining ring rows are CA21037-#R: ring A diameter reference is shown in the A column and finish in the first column.
Where to buy
AmericaDistributor coming soonOur partner for this region is on its way
EuropeDistributor coming soonOur partner for this region is on its way
OceaniaDistributor coming soonOur partner for this region is on its way
Distributors coming soon.
Sources
- CA21037 — Stud Bolt Assembly and Retaining Ring, Structural Panel Fastener (Mark IV) — nominal sizes and part numbers.
Educational reference only. not approved data. Always consult the applicable SRM, AMM, or AC 43.13-1B and your certifying authority.