28-400
For 28-400, specification type is neck_finish; description is 28 mm neck, 400 series (1 thread turn); primary dimension is T max 27.64 mm, T min 27.12 mm; secondary dimension is E max 25.25 mm, E min 24.74 mm; equivalence or compatibility note is 1 Thread turn, recorded from its source on 2026-08-12.
- Specification ID
- 28-400
- Specification type
- neck_finish our reading
- Description
- 28 mm neck, 400 series (1 thread turn)
- Primary dimension
- T max 27.64 mm, T min 27.12 mm
- Secondary dimension
- E max 25.25 mm, E min 24.74 mm
- Equivalence or compatibility note
- 1 Thread turn
- Additional data
- 400H max 10.47 mm, 400H min 9.78 mm; S max 1.55 mm, S min 0.79 mm; I min 15.60 mm; 6 threads/in.
Values marked our reading are our classification of what the source says — the source does not print them in those words. The quote below is the evidence for each one; judge it yourself.
What the source says
28 | 27.64 | 27.12 | 25.25 | 24.74 | 10.47 | 9.78 | 18.36 | 17.06 | 27.86 | 27.10 | 1.55 | 0.79 | 15.60 | 6
— contapack.com.au, retrieved 2026-08-12
Source
- contapack.com.auhttps://www.contapack.com.au/SPI-Neck-Finishes.html