FASTENER IDENTIFICATION
Fastener Part Number Identification
A family-safe guide to supported shank-diameter and maximum-grip or length codes without guessing unverified letters.
Key reference points
- Identify the basic fastener family before applying any positional rule.
- For the supported examples, the first size number is shank diameter in 1/32 in and the next applicable grip or length number is in 1/16 in.
- Treat material, alloy, finish, oversize and suffix letters as family-specific until the controlling standard verifies their meaning.
- BACB30YP6K3 reads as BACB30YP family, 6/32 in diameter, family code K and 3/16 in grip or length.
- BACR15GF6D6 reads as BACR15GF family, 6/32 in diameter, family code D and 6/16 in length.
- Do not apply pin or rivet rules to collar, nut or washer codes unless that family's standard confirms them.
Training-reference boundary
This summary is not approved repair or maintenance data. Do not inspect, classify, select material, alter structure or perform a repair from this page alone. Use the current applicable SRM, AMM, engineering order, drawing and company procedures.