CollarsBBOEING · BAC
✓ Owner approvedBACC30…M
M — First oversize collar
May be used for nominal only when approved data permits
PART NUMBER LEARNING
Understand this Part Number
Supported size positions are calculated below. Letter codes and suffixes are never guessed.
Example being read
BACC30…M- Recorded family
BACC30…MUse the collar family's own standard; do not apply a pin or rivet position rule to collar codes.
Automatic decoding stops here because the remaining format is not verified for this family.
Open the full Fastener Part Number Identification note →Quick-reference boundary
Do not select, install or substitute a fastener from this page alone. Confirm the complete part number, diameter, grip, material, finish, head style, effectivity and approved application against current controlled aircraft data and company procedures.